The C and C++ Include Header Files

/usr/include/linux/netfilter/nfnetlink_osf.h


$ cat -n /usr/include/linux/netfilter/nfnetlink_osf.h

     1	#ifndef _NF_OSF_H
     2	#define _NF_OSF_H
     3	
     4	#include <linux/types.h>
     5	#include <linux/ip.h>
     6	#include <linux/tcp.h>
     7	
     8	#define MAXGENRELEN	32
     9	
    10	#define NF_OSF_GENRE	(1 << 0)
    11	#define NF_OSF_TTL	(1 << 1)
    12	#define NF_OSF_LOG	(1 << 2)
    13	#define NF_OSF_INVERT	(1 << 3)
    14	
    15	#define NF_OSF_LOGLEVEL_ALL		0	/* log all matched fingerprints */
    16	#define NF_OSF_LOGLEVEL_FIRST		1	/* log only the first matced fingerprint */
    17	#define NF_OSF_LOGLEVEL_ALL_KNOWN	2	/* do not log unknown packets */
    18	
    19	#define NF_OSF_TTL_TRUE			0	/* True ip and fingerprint TTL comparison */
    20	
    21	/* Check if ip TTL is less than fingerprint one */
    22	#define NF_OSF_TTL_LESS			1
    23	
    24	/* Do not compare ip and fingerprint TTL at all */
    25	#define NF_OSF_TTL_NOCHECK		2
    26	
    27	#define NF_OSF_FLAGMASK		(NF_OSF_GENRE | NF_OSF_TTL | \
    28					 NF_OSF_LOG | NF_OSF_INVERT)
    29	/* Wildcard MSS (kind of).
    30	 * It is used to implement a state machine for the different wildcard values
    31	 * of the MSS and window sizes.
    32	 */
    33	struct nf_osf_wc {
    34		__u32	wc;
    35		__u32	val;
    36	};
    37	
    38	/* This struct represents IANA options
    39	 * http://www.iana.org/assignments/tcp-parameters
    40	 */
    41	struct nf_osf_opt {
    42		__u16			kind, length;
    43		struct nf_osf_wc	wc;
    44	};
    45	
    46	struct nf_osf_info {
    47		char	genre[MAXGENRELEN];
    48		__u32	len;
    49		__u32	flags;
    50		__u32	loglevel;
    51		__u32	ttl;
    52	};
    53	
    54	struct nf_osf_user_finger {
    55		struct nf_osf_wc	wss;
    56	
    57		__u8	ttl, df;
    58		__u16	ss, mss;
    59		__u16	opt_num;
    60	
    61		char	genre[MAXGENRELEN];
    62		char	version[MAXGENRELEN];
    63		char	subtype[MAXGENRELEN];
    64	
    65		/* MAX_IPOPTLEN is maximum if all options are NOPs or EOLs */
    66		struct nf_osf_opt	opt[MAX_IPOPTLEN];
    67	};
    68	
    69	struct nf_osf_nlmsg {
    70		struct nf_osf_user_finger	f;
    71		struct iphdr			ip;
    72		struct tcphdr			tcp;
    73	};
    74	
    75	/* Defines for IANA option kinds */
    76	enum iana_options {
    77		OSFOPT_EOL = 0,		/* End of options */
    78		OSFOPT_NOP,		/* NOP */
    79		OSFOPT_MSS,		/* Maximum segment size */
    80		OSFOPT_WSO,		/* Window scale option */
    81		OSFOPT_SACKP,		/* SACK permitted */
    82		OSFOPT_SACK,		/* SACK */
    83		OSFOPT_ECHO,
    84		OSFOPT_ECHOREPLY,
    85		OSFOPT_TS,		/* Timestamp option */
    86		OSFOPT_POCP,		/* Partial Order Connection Permitted */
    87		OSFOPT_POSP,		/* Partial Order Service Profile */
    88	
    89		/* Others are not used in the current OSF */
    90		OSFOPT_EMPTY = 255,
    91	};
    92	
    93	/* Initial window size option state machine: multiple of mss, mtu or
    94	 * plain numeric value. Can also be made as plain numeric value which
    95	 * is not a multiple of specified value.
    96	 */
    97	enum nf_osf_window_size_options {
    98		OSF_WSS_PLAIN	= 0,
    99		OSF_WSS_MSS,
   100		OSF_WSS_MTU,
   101		OSF_WSS_MODULO,
   102		OSF_WSS_MAX,
   103	};
   104	
   105	enum nf_osf_attr_type {
   106		OSF_ATTR_UNSPEC,
   107		OSF_ATTR_FINGER,
   108		OSF_ATTR_MAX,
   109	};
   110	
   111	/*
   112	 * Add/remove fingerprint from the kernel.
   113	 */
   114	enum nf_osf_msg_types {
   115		OSF_MSG_ADD,
   116		OSF_MSG_REMOVE,
   117		OSF_MSG_MAX,
   118	};
   119	
   120	#endif /* _NF_OSF_H */