FM / netfilter

/usr/include/linux/netfilter

Name	Size	Mode	Actions
ipset/	-	0755	rm
nfnetlink.h	2457	0644	edit dl rm
nfnetlink_acct.h	900	0644	edit dl rm
nfnetlink_compat.h	2444	0644	edit dl rm
nfnetlink_conntrack.h	6186	0644	edit dl rm
nfnetlink_cthelper.h	1206	0644	edit dl rm
nfnetlink_cttimeout.h	2951	0644	edit dl rm
nfnetlink_hook.h	1689	0644	edit dl rm
nfnetlink_log.h	3105	0644	edit dl rm
nfnetlink_osf.h	2665	0644	edit dl rm
nfnetlink_queue.h	3497	0644	edit dl rm
nf_conntrack_common.h	4588	0644	edit dl rm
nf_conntrack_ftp.h	438	0644	edit dl rm
nf_conntrack_sctp.h	597	0644	edit dl rm
nf_conntrack_tcp.h	1415	0644	edit dl rm
nf_conntrack_tuple_common.h	896	0644	edit dl rm
nf_log.h	538	0644	edit dl rm
nf_nat.h	1587	0644	edit dl rm
nf_synproxy.h	576	0644	edit dl rm
nf_tables.h	56433	0644	edit dl rm
nf_tables_compat.h	731	0644	edit dl rm
xt_addrtype.h	1084	0644	edit dl rm
xt_AUDIT.h	718	0644	edit dl rm
xt_bpf.h	935	0644	edit dl rm
xt_cgroup.h	740	0644	edit dl rm
xt_CHECKSUM.h	563	0644	edit dl rm
xt_CLASSIFY.h	217	0644	edit dl rm
xt_cluster.h	374	0644	edit dl rm
xt_comment.h	230	0644	edit dl rm
xt_connbytes.h	577	0644	edit dl rm
xt_connlabel.h	360	0644	edit dl rm
xt_connlimit.h	575	0644	edit dl rm
xt_CONNMARK.h	199	0644	edit dl rm
xt_connmark.h	901	0644	edit dl rm
xt_CONNSECMARK.h	301	0644	edit dl rm
xt_conntrack.h	2557	0644	edit dl rm
xt_cpu.h	199	0644	edit dl rm
xt_CT.h	853	0644	edit dl rm
xt_dccp.h	483	0644	edit dl rm
xt_devgroup.h	429	0644	edit dl rm
xt_DSCP.h	697	0644	edit dl rm
xt_dscp.h	701	0644	edit dl rm
xt_ecn.h	736	0644	edit dl rm
xt_esp.h	418	0644	edit dl rm
xt_hashlimit.h	3256	0644	edit dl rm
xt_helper.h	188	0644	edit dl rm
xt_HMARK.h	933	0644	edit dl rm
xt_IDLETIMER.h	1001	0644	edit dl rm
xt_ipcomp.h	485	0644	edit dl rm
xt_iprange.h	581	0644	edit dl rm
xt_ipvs.h	680	0644	edit dl rm
xt_l2tp.h	739	0644	edit dl rm
xt_LED.h	470	0644	edit dl rm
xt_length.h	221	0644	edit dl rm
xt_limit.h	673	0644	edit dl rm
xt_LOG.h	642	0644	edit dl rm
xt_mac.h	227	0644	edit dl rm
xt_MARK.h	184	0644	edit dl rm
xt_mark.h	260	0644	edit dl rm
xt_multiport.h	721	0644	edit dl rm
xt_nfacct.h	421	0644	edit dl rm
xt_NFLOG.h	556	0644	edit dl rm
xt_NFQUEUE.h	779	0644	edit dl rm
xt_osf.h	1703	0644	edit dl rm
xt_owner.h	535	0644	edit dl rm
xt_physdev.h	553	0644	edit dl rm
xt_pkttype.h	188	0644	edit dl rm
xt_policy.h	1051	0644	edit dl rm
xt_quota.h	400	0644	edit dl rm
xt_RATEEST.h	390	0644	edit dl rm
xt_rateest.h	859	0644	edit dl rm
xt_realm.h	220	0644	edit dl rm
xt_recent.h	1058	0644	edit dl rm
xt_rpfilter.h	320	0644	edit dl rm
xt_sctp.h	2329	0644	edit dl rm
xt_SECMARK.h	648	0644	edit dl rm
xt_set.h	1827	0644	edit dl rm
xt_socket.h	640	0644	edit dl rm
xt_state.h	331	0644	edit dl rm
xt_statistic.h	716	0644	edit dl rm
xt_string.h	664	0644	edit dl rm
xt_SYNPROXY.h	498	0644	edit dl rm
xt_TCPMSS.h	235	0644	edit dl rm
xt_tcpmss.h	253	0644	edit dl rm
xt_TCPOPTSTRIP.h	407	0644	edit dl rm
xt_tcpudp.h	1250	0644	edit dl rm
xt_TEE.h	333	0644	edit dl rm
xt_time.h	730	0644	edit dl rm
xt_TPROXY.h	575	0644	edit dl rm
xt_u32.h	752	0644	edit dl rm
x_tables.h	4466	0644	edit dl rm

Edit: /usr/include/linux/netfilter/nfnetlink_osf.h (2665B)

#ifndef _NF_OSF_H
#define _NF_OSF_H

#include <linux/types.h>
#include <linux/ip.h>
#include <linux/tcp.h>

#define MAXGENRELEN	32

#define NF_OSF_GENRE	(1 << 0)
#define NF_OSF_TTL	(1 << 1)
#define NF_OSF_LOG	(1 << 2)
#define NF_OSF_INVERT	(1 << 3)

#define NF_OSF_LOGLEVEL_ALL		0	/* log all matched fingerprints */
#define NF_OSF_LOGLEVEL_FIRST		1	/* log only the first matced fingerprint */
#define NF_OSF_LOGLEVEL_ALL_KNOWN	2	/* do not log unknown packets */

#define NF_OSF_TTL_TRUE			0	/* True ip and fingerprint TTL comparison */

/* Check if ip TTL is less than fingerprint one */
#define NF_OSF_TTL_LESS			1

/* Do not compare ip and fingerprint TTL at all */
#define NF_OSF_TTL_NOCHECK		2

#define NF_OSF_FLAGMASK		(NF_OSF_GENRE | NF_OSF_TTL | \
				 NF_OSF_LOG | NF_OSF_INVERT)
/* Wildcard MSS (kind of).
 * It is used to implement a state machine for the different wildcard values
 * of the MSS and window sizes.
 */
struct nf_osf_wc {
	__u32	wc;
	__u32	val;
};

/* This struct represents IANA options
 * http://www.iana.org/assignments/tcp-parameters
 */
struct nf_osf_opt {
	__u16			kind, length;
	struct nf_osf_wc	wc;
};

struct nf_osf_info {
	char	genre[MAXGENRELEN];
	__u32	len;
	__u32	flags;
	__u32	loglevel;
	__u32	ttl;
};

struct nf_osf_user_finger {
	struct nf_osf_wc	wss;

__u8	ttl, df;
	__u16	ss, mss;
	__u16	opt_num;

char	genre[MAXGENRELEN];
	char	version[MAXGENRELEN];
	char	subtype[MAXGENRELEN];

/* MAX_IPOPTLEN is maximum if all options are NOPs or EOLs */
	struct nf_osf_opt	opt[MAX_IPOPTLEN];
};

struct nf_osf_nlmsg {
	struct nf_osf_user_finger	f;
	struct iphdr			ip;
	struct tcphdr			tcp;
};

/* Defines for IANA option kinds */
enum iana_options {
	OSFOPT_EOL = 0,		/* End of options */
	OSFOPT_NOP,		/* NOP */
	OSFOPT_MSS,		/* Maximum segment size */
	OSFOPT_WSO,		/* Window scale option */
	OSFOPT_SACKP,		/* SACK permitted */
	OSFOPT_SACK,		/* SACK */
	OSFOPT_ECHO,
	OSFOPT_ECHOREPLY,
	OSFOPT_TS,		/* Timestamp option */
	OSFOPT_POCP,		/* Partial Order Connection Permitted */
	OSFOPT_POSP,		/* Partial Order Service Profile */

/* Others are not used in the current OSF */
	OSFOPT_EMPTY = 255,
};

/* Initial window size option state machine: multiple of mss, mtu or
 * plain numeric value. Can also be made as plain numeric value which
 * is not a multiple of specified value.
 */
enum nf_osf_window_size_options {
	OSF_WSS_PLAIN	= 0,
	OSF_WSS_MSS,
	OSF_WSS_MTU,
	OSF_WSS_MODULO,
	OSF_WSS_MAX,
};

enum nf_osf_attr_type {
	OSF_ATTR_UNSPEC,
	OSF_ATTR_FINGER,
	OSF_ATTR_MAX,
};

/*
 * Add/remove fingerprint from the kernel.
 */
enum nf_osf_msg_types {
	OSF_MSG_ADD,
	OSF_MSG_REMOVE,
	OSF_MSG_MAX,
};

#endif /* _NF_OSF_H */

cmd: