aboutsummaryrefslogtreecommitdiffstats
path: root/sys/netinet/ip_nat.h
blob: f0cb517bb007f1ae234d33cbab355e2fceb3eb13 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
 * Copyright (C) 1995-1997 by Darren Reed.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and due credit is given
 * to the original author and the contributors.
 *
 * @(#)ip_nat.h	1.5 2/4/96
 * $Id: ip_nat.h,v 2.0.2.23.2.1 1997/11/05 11:08:18 darrenr Exp $
 */

#ifndef	__IP_NAT_H__
#define	__IP_NAT_H__

#ifndef SOLARIS
#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#endif

#if defined(__STDC__) || defined(__GNUC__)
#define	SIOCADNAT	_IOW('r', 80, struct ipnat)
#define	SIOCRMNAT	_IOW('r', 81, struct ipnat)
#define	SIOCGNATS	_IOR('r', 82, struct natstat)
#define	SIOCGNATL	_IOWR('r', 83, struct natlookup)
#define SIOCGFRST	_IOR('r', 84, struct ipfrstat)
#define SIOCGIPST	_IOR('r', 85, struct ips_stat)
#define	SIOCFLNAT	_IOWR('r', 86, int)
#define	SIOCCNATL	_IOWR('r', 87, int)
#else
#define	SIOCADNAT	_IOW(r, 80, struct ipnat)
#define	SIOCRMNAT	_IOW(r, 81, struct ipnat)
#define	SIOCGNATS	_IOR(r, 82, struct natstat)
#define	SIOCGNATL	_IOWR(r, 83, struct natlookup)
#define SIOCGFRST	_IOR(r, 84, struct ipfrstat)
#define SIOCGIPST	_IOR(r, 85, struct ips_stat)
#define	SIOCFLNAT	_IOWR(r, 86, int)
#define	SIOCCNATL	_IOWR(r, 87, int)
#endif

#define	NAT_SIZE	367
#ifndef	APR_LABELLEN
#define	APR_LABELLEN	16
#endif

typedef	struct	nat	{
	u_long	nat_age;
	int	nat_flags;
	u_long	nat_sumd;
	u_long	nat_ipsumd;
	void	*nat_data;
	struct	in_addr	nat_inip;
	struct	in_addr	nat_outip;
	struct	in_addr	nat_oip;	/* other ip */
	U_QUAD_T	nat_pkts;
	U_QUAD_T	nat_bytes;
	u_short	nat_oport;	/* other port */
	u_short	nat_inport;
	u_short	nat_outport;
	u_short	nat_use;
	u_char	nat_state[2];
	struct	ipnat	*nat_ptr;
	struct	nat	*nat_next;
	struct	nat	*nat_hnext[2];
	struct	nat	**nat_hstart[2];
	void	*nat_ifp;
	int	nat_dir;
} nat_t;

typedef	struct	ipnat	{
	struct	ipnat	*in_next;
	void	*in_ifp;
	void	*in_apr;
	u_int	in_space;
	u_int	in_use;
	struct	in_addr	in_nextip;
	u_short	in_pnext;
	u_short	in_flags;
	u_short	in_port[2];
	struct	in_addr	in_in[2];
	struct	in_addr	in_out[2];
	int	in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
	char	in_ifname[IFNAMSIZ];
	char	in_plabel[APR_LABELLEN];	/* proxy label */
	char	in_p;	/* protocol */
	u_short	in_dport;
} ipnat_t;

#define	in_pmin		in_port[0]	/* Also holds static redir port */
#define	in_pmax		in_port[1]
#define	in_nip		in_nextip.s_addr
#define	in_inip		in_in[0].s_addr
#define	in_inmsk	in_in[1].s_addr
#define	in_outip	in_out[0].s_addr
#define	in_outmsk	in_out[1].s_addr

#define	NAT_OUTBOUND	0
#define	NAT_INBOUND	1

#define	NAT_MAP		0x01
#define	NAT_REDIRECT	0x02
#define	NAT_BIMAP	(NAT_MAP|NAT_REDIRECT)

#define	IPN_CMPSIZ	(sizeof(struct in_addr) * 4 + sizeof(u_short) * 3 + \
			 sizeof(int) + IFNAMSIZ + APR_LABELLEN + sizeof(char))

typedef	struct	natlookup {
	struct	in_addr	nl_inip;
	struct	in_addr	nl_outip;
	struct	in_addr	nl_realip;
	int	nl_flags;
	u_short	nl_inport;
	u_short	nl_outport;
	u_short	nl_realport;
} natlookup_t;

typedef	struct	natstat	{
	u_long	ns_mapped[2];
	u_long	ns_rules;
	u_long	ns_added;
	u_long	ns_expire;
	u_long	ns_inuse;
	u_long	ns_logged;
	u_long	ns_logfail;
	nat_t	**ns_table[2];
	ipnat_t	*ns_list;
} natstat_t;

#define	IPN_ANY		0x00
#define	IPN_TCP		0x01
#define	IPN_UDP		0x02
#define	IPN_TCPUDP	0x03
#define	IPN_DELETE	0x04
#define	IPN_ICMPERR	0x08


typedef	struct	natlog {
	struct	in_addr	nl_origip;
	struct	in_addr	nl_outip;
	struct	in_addr	nl_inip;
	u_short	nl_origport;
	u_short	nl_outport;
	u_short	nl_inport;
	u_short	nl_type;
	int	nl_rule;
	U_QUAD_T	nl_pkts;
	U_QUAD_T	nl_bytes;
} natlog_t;


#define	NL_NEWMAP	NAT_MAP
#define	NL_NEWRDR	NAT_REDIRECT
#define	NL_EXPIRE	0xffff


extern	void	ip_natsync __P((void *));
extern	u_long	fr_defnatage;
extern	u_long	fr_defnaticmpage;
extern	nat_t	*nat_table[2][NAT_SIZE];
#if defined(__NetBSD__) || defined(__OpenBSD__)
extern	int	nat_ioctl __P((caddr_t, u_long, int));
#else
extern	int	nat_ioctl __P((caddr_t, int, int));
#endif
extern	nat_t	*nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_short, int));
extern	nat_t	*nat_outlookup __P((void *, int, struct in_addr, u_short,
				 struct in_addr, u_short));
extern	nat_t	*nat_inlookup __P((void *, int, struct in_addr, u_short,
				struct in_addr, u_short));
extern	nat_t	*nat_lookupredir __P((natlookup_t *));
extern	nat_t	*nat_lookupmapip __P((void *, int, struct in_addr, u_short,
				   struct in_addr, u_short));
extern	nat_t	*nat_icmpinlookup __P((ip_t *, fr_info_t *));
extern	nat_t	*nat_icmpin __P((ip_t *, fr_info_t *, int *));

extern	int	ip_natout __P((ip_t *, int, fr_info_t *));
extern	int	ip_natin __P((ip_t *, int, fr_info_t *));
extern	void	ip_natunload __P((void)), ip_natexpire __P((void));
extern	void	nat_log __P((struct nat *, u_short));
extern	void	fix_incksum __P((u_short *, u_long));
extern	void	fix_outcksum __P((u_short *, u_long));
#endif /* __IP_NAT_H__ */