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/* $OpenBSD: ip_nat.h,v 1.7 1997/06/23 19:03:50 kstailey Exp $ */
/*
* (C)opyright 1995 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
* $DRId: ip_nat.h,v 2.0.1.9 1997/03/20 10:20:50 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
typedef struct nat {
u_long nat_age;
int nat_flags;
u_long nat_sumd;
u_long nat_ipsumd;
struct in_addr nat_inip;
struct in_addr nat_outip;
struct in_addr nat_oip; /* other ip */
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];
} nat_t;
typedef struct ipnat {
struct ipnat *in_next;
void *in_ifp;
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];
} 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_INBOUND 0
#define NAT_OUTBOUND 1
#define NAT_MAP 0
#define NAT_REDIRECT 1
#define IPN_CMPSIZ (sizeof(struct in_addr) * 4 + sizeof(u_short) * 3 + \
sizeof(int) + IFNAMSIZ)
typedef struct natlookup {
struct in_addr nl_inip;
struct in_addr nl_outip;
u_short nl_inport;
u_short nl_outport;
} natlookup_t;
typedef struct natstat {
u_long ns_mapped[2];
u_long ns_added;
u_long ns_expire;
u_long ns_inuse;
nat_t **ns_table[2];
ipnat_t *ns_list;
} natstat_t;
#define IPN_ANY 0
#define IPN_TCP 1
#define IPN_UDP 2
#define IPN_TCPUDP 3
extern nat_t *nat_table[2][NAT_SIZE];
extern int nat_ioctl __P((caddr_t, u_long, int));
extern nat_t *nat_outlookup __P((int, struct in_addr, u_short, struct in_addr,
u_short));
extern nat_t *nat_inlookup __P((int, struct in_addr, u_short, struct in_addr,
u_short));
extern nat_t *nat_lookupredir __P((natlookup_t *));
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));
extern void ip_natexpire __P((void));
#endif /* __IP_NAT_H__ */
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