/* $FreeBSD: releng/10.2/sys/contrib/ipfilter/netinet/ip_nat.h 255332 2013-09-06 23:11:19Z cy $ */
/*
* Copyright (C) 2012 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* @(#)ip_nat.h 1.5 2/4/96
* $FreeBSD: releng/10.2/sys/contrib/ipfilter/netinet/ip_nat.h 255332 2013-09-06 23:11:19Z cy $
* Id: ip_nat.h,v 2.90.2.20 2007/09/25 08:27:32 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__) || defined(_AIX51)
#define SIOCADNAT _IOW('r', 60, struct ipfobj)
#define SIOCRMNAT _IOW('r', 61, struct ipfobj)
#define SIOCGNATS _IOWR('r', 62, struct ipfobj)
#define SIOCGNATL _IOWR('r', 63, struct ipfobj)
#define SIOCPURGENAT _IOWR('r', 100, struct ipfobj)
#else
#define SIOCADNAT _IOW(r, 60, struct ipfobj)
#define SIOCRMNAT _IOW(r, 61, struct ipfobj)
#define SIOCGNATS _IOWR(r, 62, struct ipfobj)
#define SIOCGNATL _IOWR(r, 63, struct ipfobj)
#define SIOCPURGENAT _IOWR(r, 100, struct ipfobj)
#endif
#undef LARGE_NAT /* define this if you're setting up a system to NAT
* LARGE numbers of networks/hosts - i.e. in the
* hundreds or thousands. In such a case, you should
* also change the RDR_SIZE and NAT_SIZE below to more
* appropriate sizes. The figures below were used for
* a setup with 1000-2000 networks to NAT.
*/
#ifndef NAT_SIZE
# ifdef LARGE_NAT
# define NAT_SIZE 2047
# else
# define NAT_SIZE 127
# endif
#endif
#ifndef RDR_SIZE
# ifdef LARGE_NAT
# define RDR_SIZE 2047
# else
# define RDR_SIZE 127
# endif
#endif
#ifndef HOSTMAP_SIZE
# ifdef LARGE_NAT
# define HOSTMAP_SIZE 8191
# else
# define HOSTMAP_SIZE 2047
# endif
#endif
#ifndef NAT_TABLE_MAX
/*
* This is newly introduced and for the sake of "least surprise", the numbers
* present aren't what we'd normally use for creating a proper hash table.
*/
# ifdef LARGE_NAT
# define NAT_TABLE_MAX 180000
# else
# define NAT_TABLE_MAX 30000
# endif
#endif
#ifndef NAT_TABLE_SZ
# ifdef LARGE_NAT
# define NAT_TABLE_SZ 16383
# else
# define NAT_TABLE_SZ 2047
# endif
#endif
#ifndef APR_LABELLEN
#define APR_LABELLEN 16
#endif
#define NAT_HW_CKSUM 0x80000000
#define NAT_HW_CKSUM_PART 0x40000000
#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */
struct ipstate;
struct ap_session;
/*
* This structure is used in the active NAT table and represents an
* active NAT session.
*/
typedef struct nat {
ipfmutex_t nat_lock;
struct nat *nat_next;
struct nat **nat_pnext;
struct nat *nat_hnext[2];
struct nat **nat_phnext[2];
struct hostmap *nat_hm;
void *nat_data;
struct nat **nat_me;
struct ipstate *nat_state;
struct ap_session *nat_aps; /* proxy session */
frentry_t *nat_fr; /* filter rule ptr if appropriate */
struct ipnat *nat_ptr; /* pointer back to the rule */
void *nat_ifps[2];
void *nat_sync;
ipftqent_t nat_tqe;
int nat_mtu[2];
u_32_t nat_flags;
u_32_t nat_sumd[2]; /* ip checksum delta for data segment*/
u_32_t nat_ipsumd; /* ip checksum delta for ip header */
u_32_t nat_mssclamp; /* if != zero clamp MSS to this */
i6addr_t nat_odst6;
i6addr_t nat_osrc6;
i6addr_t nat_ndst6;
i6addr_t nat_nsrc6;
U_QUAD_T nat_pkts[2];
U_QUAD_T nat_bytes[2];
union {
udpinfo_t nat_unu;
tcpinfo_t nat_unt;
icmpinfo_t nat_uni;
greinfo_t nat_ugre;
} nat_unold, nat_unnew;
int nat_use;
int nat_pr[2]; /* protocol for NAT */
int nat_dir;
int nat_ref; /* reference count */
u_int nat_hv[2];
char nat_ifnames[2][LIFNAMSIZ];
int nat_rev; /* 0 = forward, 1 = reverse */
int nat_dlocal;
int nat_v[2]; /* 0 = old, 1 = new */
u_int nat_redir; /* copy of in_redir */
} nat_t;
#define nat_osrcip nat_osrc6.in4
#define nat_odstip nat_odst6.in4
#define nat_nsrcip nat_nsrc6.in4
#define nat_ndstip nat_ndst6.in4
#define nat_osrcaddr nat_osrc6.in4.s_addr
#define nat_odstaddr nat_odst6.in4.s_addr
#define nat_nsrcaddr nat_nsrc6.in4.s_addr
#define nat_ndstaddr nat_ndst6.in4.s_addr
#define nat_age nat_tqe.tqe_die
#define nat_osport nat_unold.nat_unt.ts_sport
#define nat_odport nat_unold.nat_unt.ts_dport
#define nat_nsport nat_unnew.nat_unt.ts_sport
#define nat_ndport nat_unnew.nat_unt.ts_dport
#define nat_oicmpid nat_unold.nat_uni.ici_id
#define nat_nicmpid nat_unnew.nat_uni.ici_id
#define nat_type nat_unold.nat_uni.ici_type
#define nat_oseq nat_unold.nat_uni.ici_seq
#define nat_nseq nat_unnew.nat_uni.ici_seq
#define nat_tcpstate nat_tqe.tqe_state
#define nat_die nat_tqe.tqe_die
#define nat_touched nat_tqe.tqe_touched
/*
* Values for nat_dir
*/
#define NAT_INBOUND 0
#define NAT_OUTBOUND 1
#define NAT_ENCAPIN 2
#define NAT_ENCAPOUT 3
#define NAT_DIVERTIN 4
#define NAT_DIVERTOUT 5
/*
* Definitions for nat_flags
*/
#define NAT_TCP 0x0001 /* IPN_TCP */
#define NAT_UDP 0x0002 /* IPN_UDP */
#define NAT_ICMPERR 0x0004 /* IPN_ICMPERR */
#define NAT_ICMPQUERY 0x0008 /* IPN_ICMPQUERY */
#define NAT_SEARCH 0x0010
#define NAT_SLAVE 0x0020 /* Slave connection for a proxy */
#define NAT_NOTRULEPORT 0x0040 /* Don't use the port # in the NAT rule */
#define NAT_TCPUDP (NAT_TCP|NAT_UDP)
#define NAT_TCPUDPICMP (NAT_TCP|NAT_UDP|NAT_ICMPERR)
#define NAT_TCPUDPICMPQ (NAT_TCP|NAT_UDP|NAT_ICMPQUERY)
#define NAT_FROMRULE (NAT_TCP|NAT_UDP)
/* 0x0100 reserved for FI_W_SPORT */
/* 0x0200 reserved for FI_W_DPORT */
/* 0x0400 reserved for FI_W_SADDR */
/* 0x0800 reserved for FI_W_DADDR */
/* 0x1000 reserved for FI_W_NEWFR */
/* 0x2000 reserved for SI_CLONE */
/* 0x4000 reserved for SI_CLONED */
/* 0x8000 reserved for SI_IGNOREPKT */
#define NAT_DEBUG 0x800000
typedef struct nat_addr_s {
i6addr_t na_addr[2];
i6addr_t na_nextaddr;
int na_atype;
int na_function;
} nat_addr_t;
#define na_nextip na_nextaddr.in4.s_addr
#define na_nextip6 na_nextaddr.in6
#define na_num na_addr[0].iplookupnum
#define na_type na_addr[0].iplookuptype
#define na_subtype na_addr[0].iplookupsubtype
#define na_ptr na_addr[1].iplookupptr
#define na_func na_addr[1].iplookupfunc
/*
* This structure represents an actual NAT rule, loaded by ipnat.
*/
typedef struct ipnat {
ipfmutex_t in_lock;
struct ipnat *in_next; /* NAT rule list next */
struct ipnat **in_pnext; /* prior rdr next ptr */
struct ipnat *in_rnext; /* rdr rule hash next */
struct ipnat **in_prnext; /* prior rdr next ptr */
struct ipnat *in_mnext; /* map rule hash next */
struct ipnat **in_pmnext; /* prior map next ptr */
struct ipftq *in_tqehead[2];
void *in_ifps[2];
void *in_apr;
char *in_comment;
mb_t *in_divmp;
void *in_pconf;
U_QUAD_T in_pkts[2];
U_QUAD_T in_bytes[2];
u_long in_space;
u_long in_hits;
int in_size;
int in_use;
u_int in_hv[2];
int in_flineno; /* conf. file line number */
int in_stepnext;
int in_dlocal;
u_short in_dpnext;
u_short in_spnext;
/* From here to the end is covered by IPN_CMPSIZ */
u_char in_v[2]; /* 0 = old, 1 = new */
u_32_t in_flags;
u_32_t in_mssclamp; /* if != 0 clamp MSS to this */
u_int in_age[2];
int in_redir; /* see below for values */
int in_pr[2]; /* protocol. */
nat_addr_t in_ndst;
nat_addr_t in_nsrc;
nat_addr_t in_osrc;
nat_addr_t in_odst;
frtuc_t in_tuc;
u_short in_ppip; /* ports per IP. */
u_short in_ippip; /* IP #'s per IP# */
u_short in_ndports[2];
u_short in_nsports[2];
int in_ifnames[2];
int in_plabel; /* proxy label. */
int in_pconfig; /* proxy label. */
ipftag_t in_tag;
int in_namelen;
char in_names[1];
} ipnat_t;
/*
* MAP-IN MAP-OUT RDR-IN RDR-OUT
* osrc X == src == src X
* odst X == dst == dst X
* nsrc == dst X X == dst
* ndst == src X X == src
*/
#define in_dpmin in_ndports[0] /* Also holds static redir port */
#define in_dpmax in_ndports[1]
#define in_spmin in_nsports[0] /* Also holds static redir port */
#define in_spmax in_nsports[1]
#define in_ndport in_ndports[0]
#define in_nsport in_nsports[0]
#define in_dipnext in_ndst.na_nextaddr.in4
#define in_dipnext6 in_ndst.na_nextaddr
#define in_dnip in_ndst.na_nextaddr.in4.s_addr
#define in_dnip6 in_ndst.na_nextaddr
#define in_sipnext in_nsrc.na_nextaddr.in4
#define in_snip in_nsrc.na_nextaddr.in4.s_addr
#define in_snip6 in_nsrc.na_nextaddr
#define in_odstip in_odst.na_addr[0].in4
#define in_odstip6 in_odst.na_addr[0]
#define in_odstaddr in_odst.na_addr[0].in4.s_addr
#define in_odstmsk in_odst.na_addr[1].in4.s_addr
#define in_odstmsk6 in_odst.na_addr[1]
#define in_odstatype in_odst.na_atype
#define in_osrcip in_osrc.na_addr[0].in4
#define in_osrcip6 in_osrc.na_addr[0]
#define in_osrcaddr in_osrc.na_addr[0].in4.s_addr
#define in_osrcmsk in_osrc.na_addr[1].in4.s_addr
#define in_osrcmsk6 in_osrc.na_addr[1]
#define in_osrcatype in_osrc.na_atype
#define in_ndstip in_ndst.na_addr[0].in4
#define in_ndstip6 in_ndst.na_addr[0]
#define in_ndstaddr in_ndst.na_addr[0].in4.s_addr
#define in_ndstmsk in_ndst.na_addr[1].in4.s_addr
#define in_ndstmsk6 in_ndst.na_addr[1]
#define in_ndstatype in_ndst.na_atype
#define in_ndstafunc in_ndst.na_function
#define in_nsrcip in_nsrc.na_addr[0].in4
#define in_nsrcip6 in_nsrc.na_addr[0]
#define in_nsrcaddr in_nsrc.na_addr[0].in4.s_addr
#define in_nsrcmsk in_nsrc.na_addr[1].in4.s_addr
#define in_nsrcmsk6 in_nsrc.na_addr[1]
#define in_nsrcatype in_nsrc.na_atype
#define in_nsrcafunc in_nsrc.na_function
#define in_scmp in_tuc.ftu_scmp
#define in_dcmp in_tuc.ftu_dcmp
#define in_stop in_tuc.ftu_stop
#define in_dtop in_tuc.ftu_dtop
#define in_osport in_tuc.ftu_sport
#define in_odport in_tuc.ftu_dport
#define in_ndstnum in_ndst.na_addr[0].iplookupnum
#define in_ndsttype in_ndst.na_addr[0].iplookuptype
#define in_ndstptr in_ndst.na_addr[1].iplookupptr
#define in_ndstfunc in_ndst.na_addr[1].iplookupfunc
#define in_nsrcnum in_nsrc.na_addr[0].iplookupnum
#define in_nsrctype in_nsrc.na_addr[0].iplookuptype
#define in_nsrcptr in_nsrc.na_addr[1].iplookupptr
#define in_nsrcfunc in_nsrc.na_addr[1].iplookupfunc
#define in_odstnum in_odst.na_addr[0].iplookupnum
#define in_odsttype in_odst.na_addr[0].iplookuptype
#define in_odstptr in_odst.na_addr[1].iplookupptr
#define in_odstfunc in_odst.na_addr[1].iplookupfunc
#define in_osrcnum in_osrc.na_addr[0].iplookupnum
#define in_osrctype in_osrc.na_addr[0].iplookuptype
#define in_osrcptr in_osrc.na_addr[1].iplookupptr
#define in_osrcfunc in_osrc.na_addr[1].iplookupfunc
#define in_icmpidmin in_nsports[0]
#define in_icmpidmax in_nsports[1]
/*
* Bit definitions for in_flags
*/
#define IPN_ANY 0x00000
#define IPN_TCP 0x00001
#define IPN_UDP 0x00002
#define IPN_TCPUDP (IPN_TCP|IPN_UDP)
#define IPN_ICMPERR 0x00004
#define IPN_TCPUDPICMP (IPN_TCP|IPN_UDP|IPN_ICMPERR)
#define IPN_ICMPQUERY 0x00008
#define IPN_TCPUDPICMPQ (IPN_TCP|IPN_UDP|IPN_ICMPQUERY)
#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR)
#define IPN_AUTOPORTMAP 0x00010
#define IPN_FILTER 0x00020
#define IPN_SPLIT 0x00040
#define IPN_ROUNDR 0x00080
#define IPN_SIPRANGE 0x00100
#define IPN_DIPRANGE 0x00200
#define IPN_NOTSRC 0x00400
#define IPN_NOTDST 0x00800
#define IPN_NO 0x01000
#define IPN_DYNSRCIP 0x02000 /* dynamic src IP# */
#define IPN_DYNDSTIP 0x04000 /* dynamic dst IP# */
#define IPN_DELETE 0x08000
#define IPN_STICKY 0x10000
#define IPN_FRAG 0x20000
#define IPN_FIXEDSPORT 0x40000
#define IPN_FIXEDDPORT 0x80000
#define IPN_FINDFORWARD 0x100000
#define IPN_IN 0x200000
#define IPN_SEQUENTIAL 0x400000
#define IPN_PURGE 0x800000
#define IPN_PROXYRULE 0x1000000
#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_SIPRANGE|IPN_SPLIT|\
IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST|IPN_NO|\
IPN_FRAG|IPN_STICKY|IPN_FIXEDDPORT|IPN_ICMPQUERY|\
IPN_DIPRANGE|IPN_SEQUENTIAL|IPN_PURGE)
/*
* Values for in_redir
*/
#define NAT_MAP 0x01
#define NAT_REDIRECT 0x02
#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT)
#define NAT_MAPBLK 0x04
#define NAT_REWRITE 0x08
#define NAT_ENCAP 0x10
#define NAT_DIVERTUDP 0x20
#define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */
#define USABLE_PORTS (65536 - MAPBLK_MINPORT)
#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_v))
typedef struct natlookup {
i6addr_t nl_inipaddr;
i6addr_t nl_outipaddr;
i6addr_t nl_realipaddr;
int nl_v;
int nl_flags;
u_short nl_inport;
u_short nl_outport;
u_short nl_realport;
} natlookup_t;
#define nl_inip nl_inipaddr.in4
#define nl_outip nl_outipaddr.in4
#define nl_realip nl_realipaddr.in4
#define nl_inip6 nl_inipaddr.in6
#define nl_outip6 nl_outipaddr.in6
#define nl_realip6 nl_realipaddr.in6
typedef struct nat_save {
void *ipn_next;
struct nat ipn_nat;
struct ipnat ipn_ipnat;
struct frentry ipn_fr;
int ipn_dsize;
char ipn_data[4];
} nat_save_t;
#define ipn_rule ipn_nat.nat_fr
typedef struct natget {
void *ng_ptr;
int ng_sz;
} natget_t;
/*
* This structure gets used to help NAT sessions keep the same NAT rule (and
* thus translation for IP address) when:
* (a) round-robin redirects are in use
* (b) different IP add
*/
typedef struct hostmap {
struct hostmap *hm_hnext;
struct hostmap **hm_phnext;
struct hostmap *hm_next;
struct hostmap **hm_pnext;
struct ipnat *hm_ipnat;
i6addr_t hm_osrcip6;
i6addr_t hm_odstip6;
i6addr_t hm_nsrcip6;
i6addr_t hm_ndstip6;
u_32_t hm_port;
int hm_ref;
int hm_hv;
int hm_v;
} hostmap_t;
#define hm_osrcip hm_osrcip6.in4
#define hm_odstip hm_odstip6.in4
#define hm_nsrcip hm_nsrcip6.in4
#define hm_ndstip hm_ndstip6.in4
#define hm_osrc6 hm_osrcip6.in6
#define hm_odst6 hm_odstip6.in6
#define hm_nsrc6 hm_nsrcip6.in6
#define hm_ndst6 hm_ndstip6.in6
/*
* Structure used to pass information in to nat_newmap and nat_newrdr.
*/
typedef struct natinfo {
ipnat_t *nai_np;
u_32_t nai_sum1;
u_32_t nai_sum2;
struct in_addr nai_ip; /* In host byte order */
u_short nai_port;
u_short nai_nport;
u_short nai_sport;
u_short nai_dport;
} natinfo_t;
typedef struct nat_stat_side {
u_int *ns_bucketlen;
nat_t **ns_table;
u_long ns_added;
u_long ns_appr_fail;
u_long ns_badnat;
u_long ns_badnatnew;
u_long ns_badnextaddr;
u_long ns_bucket_max;
u_long ns_clone_nomem;
u_long ns_decap_bad;
u_long ns_decap_fail;
u_long ns_decap_pullup;
u_long ns_divert_dup;
u_long ns_divert_exist;
u_long ns_drop;
u_long ns_encap_dup;
u_long ns_encap_pullup;
u_long ns_exhausted;
u_long ns_icmp_address;
u_long ns_icmp_basic;
u_long ns_icmp_mbuf;
u_long ns_icmp_notfound;
u_long ns_icmp_rebuild;
u_long ns_icmp_short;
u_long ns_icmp_size;
u_long ns_ifpaddrfail;
u_long ns_ignored;
u_long ns_insert_fail;
u_long ns_inuse;
u_long ns_log;
u_long ns_lookup_miss;
u_long ns_lookup_nowild;
u_long ns_new_ifpaddr;
u_long ns_memfail;
u_long ns_table_max;
u_long ns_translated;
u_long ns_unfinalised;
u_long ns_wrap;
u_long ns_xlate_null;
u_long ns_xlate_exists;
u_long ns_ipf_proxy_fail;
u_long ns_uncreate[2];
} nat_stat_side_t;
typedef struct natstat {
nat_t *ns_instances;
ipnat_t *ns_list;
hostmap_t *ns_maplist;
hostmap_t **ns_maptable;
u_int ns_active;
u_long ns_addtrpnt;
u_long ns_divert_build;
u_long ns_expire;
u_long ns_flush_all;
u_long ns_flush_closing;
u_long ns_flush_queue;
u_long ns_flush_state;
u_long ns_flush_timeout;
u_long ns_hm_new;
u_long ns_hm_newfail;
u_long ns_hm_addref;
u_long ns_hm_nullnp;
u_long ns_log_ok;
u_long ns_log_fail;
u_int ns_hostmap_sz;
u_int ns_nattab_sz;
u_int ns_nattab_max;
u_int ns_orphans;
u_int ns_rules;
u_int ns_rules_map;
u_int ns_rules_rdr;
u_int ns_rultab_sz;
u_int ns_rdrtab_sz;
u_32_t ns_ticks;
u_int ns_trpntab_sz;
u_int ns_wilds;
u_long ns_proto[256];
nat_stat_side_t ns_side[2];
#ifdef USE_INET6
nat_stat_side_t ns_side6[2];
#endif
} natstat_t;
typedef struct natlog {
i6addr_t nl_osrcip;
i6addr_t nl_odstip;
i6addr_t nl_nsrcip;
i6addr_t nl_ndstip;
u_short nl_osrcport;
u_short nl_odstport;
u_short nl_nsrcport;
u_short nl_ndstport;
int nl_action;
int nl_type;
int nl_rule;
U_QUAD_T nl_pkts[2];
U_QUAD_T nl_bytes[2];
u_char nl_p[2];
u_char nl_v[2];
u_char nl_ifnames[2][LIFNAMSIZ];
} natlog_t;
#define NL_NEW 0
#define NL_CLONE 1
#define NL_PURGE 0xfffc
#define NL_DESTROY 0xfffd
#define NL_FLUSH 0xfffe
#define NL_EXPIRE 0xffff
#define NAT_HASH_FN(_k,_l,_m) (((_k) + ((_k) >> 12) + _l) % (_m))
#define NAT_HASH_FN6(_k,_l,_m) ((((u_32_t *)(_k))[3] \
+ (((u_32_t *)(_k))[3] >> 12) \
+ (((u_32_t *)(_k))[2]) \
+ (((u_32_t *)(_k))[2] >> 12) \
+ (((u_32_t *)(_k))[1]) \
+ (((u_32_t *)(_k))[1] >> 12) \
+ (((u_32_t *)(_k))[0]) \
+ (((u_32_t *)(_k))[0] >> 12) \
+ _l) % (_m))
#define LONG_SUM(_i) (((_i) & 0xffff) + ((_i) >> 16))
#define LONG_SUM6(_i) (LONG_SUM(ntohl(((u_32_t *)(_i))[0])) + \
LONG_SUM(ntohl(((u_32_t *)(_i))[1])) + \
LONG_SUM(ntohl(((u_32_t *)(_i))[2])) + \
LONG_SUM(ntohl(((u_32_t *)(_i))[3])))
#define CALC_SUMD(s1, s2, sd) { \
(s1) = ((s1) & 0xffff) + ((s1) >> 16); \
(s2) = ((s2) & 0xffff) + ((s2) >> 16); \
/* Do it twice */ \
(s1) = ((s1) & 0xffff) + ((s1) >> 16); \
(s2) = ((s2) & 0xffff) + ((s2) >> 16); \
/* Because ~1 == -2, We really need ~1 == -1 */ \
if ((s1) > (s2)) (s2)--; \
(sd) = (s2) - (s1); \
(sd) = ((sd) & 0xffff) + ((sd) >> 16); }
#define NAT_SYSSPACE 0x80000000
#define NAT_LOCKHELD 0x40000000
/*
* This is present in ip_nat.h because it needs to be shared between
* ip_nat.c and ip_nat6.c
*/
typedef struct ipf_nat_softc_s {
ipfmutex_t ipf_nat_new;
ipfmutex_t ipf_nat_io;
int ipf_nat_doflush;
int ipf_nat_logging;
int ipf_nat_lock;
int ipf_nat_inited;
int ipf_nat_table_wm_high;
int ipf_nat_table_wm_low;
u_int ipf_nat_table_max;
u_int ipf_nat_table_sz;
u_int ipf_nat_maprules_sz;
u_int ipf_nat_rdrrules_sz;
u_int ipf_nat_hostmap_sz;
u_int ipf_nat_maxbucket;
u_int ipf_nat_last_force_flush;
u_int ipf_nat_defage;
u_int ipf_nat_defipage;
u_int ipf_nat_deficmpage;
ipf_v4_masktab_t ipf_nat_map_mask;
ipf_v6_masktab_t ipf_nat6_map_mask;
ipf_v4_masktab_t ipf_nat_rdr_mask;
ipf_v6_masktab_t ipf_nat6_rdr_mask;
nat_t **ipf_nat_table[2];
nat_t *ipf_nat_instances;
ipnat_t *ipf_nat_list;
ipnat_t **ipf_nat_list_tail;
ipnat_t **ipf_nat_map_rules;
ipnat_t **ipf_nat_rdr_rules;
ipftq_t *ipf_nat_utqe;
hostmap_t **ipf_hm_maptable ;
hostmap_t *ipf_hm_maplist ;
ipftuneable_t *ipf_nat_tune;
ipftq_t ipf_nat_udptq;
ipftq_t ipf_nat_udpacktq;
ipftq_t ipf_nat_icmptq;
ipftq_t ipf_nat_icmpacktq;
ipftq_t ipf_nat_iptq;
ipftq_t ipf_nat_pending;
ipftq_t ipf_nat_tcptq[IPF_TCP_NSTATES];
natstat_t ipf_nat_stats;
} ipf_nat_softc_t ;
#define ipf_nat_map_max ipf_nat_map_mask.imt4_max
#define ipf_nat_rdr_max ipf_nat_rdr_mask.imt4_max
#define ipf_nat6_map_max ipf_nat6_map_mask.imt6_max
#define ipf_nat6_rdr_max ipf_nat6_rdr_mask.imt6_max
#define ipf_nat_map_active_masks ipf_nat_map_mask.imt4_active
#define ipf_nat_rdr_active_masks ipf_nat_rdr_mask.imt4_active
#define ipf_nat6_map_active_masks ipf_nat6_map_mask.imt6_active
#define ipf_nat6_rdr_active_masks ipf_nat6_rdr_mask.imt6_active
extern frentry_t ipfnatblock;
extern void ipf_fix_datacksum __P((u_short *, u_32_t));
extern void ipf_fix_incksum __P((int, u_short *, u_32_t, u_32_t));
extern void ipf_fix_outcksum __P((int, u_short *, u_32_t, u_32_t));
extern int ipf_nat_checkin __P((fr_info_t *, u_32_t *));
extern int ipf_nat_checkout __P((fr_info_t *, u_32_t *));
extern void ipf_nat_delete __P((ipf_main_softc_t *, struct nat *, int));
extern void ipf_nat_deref __P((ipf_main_softc_t *, nat_t **));
extern void ipf_nat_expire __P((ipf_main_softc_t *));
extern int ipf_nat_hashtab_add __P((ipf_main_softc_t *,
ipf_nat_softc_t *, nat_t *));
extern void ipf_nat_hostmapdel __P((ipf_main_softc_t *, hostmap_t **));
extern int ipf_nat_hostmap_rehash __P((ipf_main_softc_t *,
ipftuneable_t *, ipftuneval_t *));
extern nat_t *ipf_nat_icmperrorlookup __P((fr_info_t *, int));
extern nat_t *ipf_nat_icmperror __P((fr_info_t *, u_int *, int));
#if defined(__OpenBSD__)
extern void ipf_nat_ifdetach __P((void *));
#endif
extern int ipf_nat_init __P((void));
extern nat_t *ipf_nat_inlookup __P((fr_info_t *, u_int, u_int,
struct in_addr, struct in_addr));
extern int ipf_nat_in __P((fr_info_t *, nat_t *, int, u_32_t));
extern int ipf_nat_insert __P((ipf_main_softc_t *, ipf_nat_softc_t *,
nat_t *));
extern int ipf_nat_ioctl __P((ipf_main_softc_t *, caddr_t, ioctlcmd_t,
int, int, void *));
extern void ipf_nat_log __P((ipf_main_softc_t *, ipf_nat_softc_t *,
struct nat *, u_int));
extern nat_t *ipf_nat_lookupredir __P((natlookup_t *));
extern nat_t *ipf_nat_maplookup __P((void *, u_int, struct in_addr,
struct in_addr));
extern nat_t *ipf_nat_add __P((fr_info_t *, ipnat_t *, nat_t **,
u_int, int));
extern int ipf_nat_out __P((fr_info_t *, nat_t *, int, u_32_t));
extern nat_t *ipf_nat_outlookup __P((fr_info_t *, u_int, u_int,
struct in_addr, struct in_addr));
extern u_short *ipf_nat_proto __P((fr_info_t *, nat_t *, u_int));
extern void ipf_nat_rule_deref __P((ipf_main_softc_t *, ipnat_t **));
extern void ipf_nat_setqueue __P((ipf_main_softc_t *, ipf_nat_softc_t *,
nat_t *));
extern void ipf_nat_setpending __P((ipf_main_softc_t *, nat_t *));
extern nat_t *ipf_nat_tnlookup __P((fr_info_t *, int));
extern void ipf_nat_update __P((fr_info_t *, nat_t *));
extern int ipf_nat_rehash __P((ipf_main_softc_t *, ipftuneable_t *,
ipftuneval_t *));
extern int ipf_nat_rehash_rules __P((ipf_main_softc_t *, ipftuneable_t *,
ipftuneval_t *));
extern int ipf_nat_settimeout __P((struct ipf_main_softc_s *,
ipftuneable_t *, ipftuneval_t *));
extern void ipf_nat_sync __P((ipf_main_softc_t *, void *));
extern nat_t *ipf_nat_clone __P((fr_info_t *, nat_t *));
extern void ipf_nat_delmap __P((ipf_nat_softc_t *, ipnat_t *));
extern void ipf_nat_delrdr __P((ipf_nat_softc_t *, ipnat_t *));
extern int ipf_nat_wildok __P((nat_t *, int, int, int, int));
extern void ipf_nat_setlock __P((void *, int));
extern void ipf_nat_load __P((void));
extern void *ipf_nat_soft_create __P((ipf_main_softc_t *));
extern int ipf_nat_soft_init __P((ipf_main_softc_t *, void *));
extern void ipf_nat_soft_destroy __P((ipf_main_softc_t *, void *));
extern int ipf_nat_soft_fini __P((ipf_main_softc_t *, void *));
extern int ipf_nat_main_load __P((void));
extern int ipf_nat_main_unload __P((void));
extern ipftq_t *ipf_nat_add_tq __P((ipf_main_softc_t *, int));
extern void ipf_nat_uncreate __P((fr_info_t *));
#ifdef USE_INET6
extern nat_t *ipf_nat6_add __P((fr_info_t *, ipnat_t *, nat_t **,
u_int, int));
extern void ipf_nat6_addrdr __P((ipf_nat_softc_t *, ipnat_t *));
extern void ipf_nat6_addmap __P((ipf_nat_softc_t *, ipnat_t *));
extern void ipf_nat6_addencap __P((ipf_nat_softc_t *, ipnat_t *));
extern int ipf_nat6_checkout __P((fr_info_t *, u_32_t *));
extern int ipf_nat6_checkin __P((fr_info_t *, u_32_t *));
extern void ipf_nat6_delmap __P((ipf_nat_softc_t *, ipnat_t *));
extern void ipf_nat6_delrdr __P((ipf_nat_softc_t *, ipnat_t *));
extern int ipf_nat6_finalise __P((fr_info_t *, nat_t *));
extern nat_t *ipf_nat6_icmperror __P((fr_info_t *, u_int *, int));
extern nat_t *ipf_nat6_icmperrorlookup __P((fr_info_t *, int));
extern nat_t *ipf_nat6_inlookup __P((fr_info_t *, u_int, u_int,
struct in6_addr *, struct in6_addr *));
extern u_32_t ipf_nat6_ip6subtract __P((i6addr_t *, i6addr_t *));
extern frentry_t *ipf_nat6_ipfin __P((fr_info_t *, u_32_t *));
extern frentry_t *ipf_nat6_ipfout __P((fr_info_t *, u_32_t *));
extern nat_t *ipf_nat6_lookupredir __P((natlookup_t *));
extern int ipf_nat6_newmap __P((fr_info_t *, nat_t *, natinfo_t *));
extern int ipf_nat6_newrdr __P((fr_info_t *, nat_t *, natinfo_t *));
extern nat_t *ipf_nat6_outlookup __P((fr_info_t *, u_int, u_int,
struct in6_addr *, struct in6_addr *));
extern int ipf_nat6_newrewrite __P((fr_info_t *, nat_t *, natinfo_t *));
extern int ipf_nat6_newdivert __P((fr_info_t *, nat_t *, natinfo_t *));
extern int ipf_nat6_ruleaddrinit __P((ipf_main_softc_t *, ipf_nat_softc_t *, ipnat_t *));
#endif
#endif /* __IP_NAT_H__ */
Charlie Root