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Diffstat (limited to 'sys/netinet/ip_nat.h')
| -rw-r--r-- | sys/netinet/ip_nat.h | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/sys/netinet/ip_nat.h b/sys/netinet/ip_nat.h new file mode 100644 index 0000000..eeeebec --- /dev/null +++ b/sys/netinet/ip_nat.h @@ -0,0 +1,247 @@ +/* + * Copyright (C) 1995-1998 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 2.1.2.1 1999/08/14 04:47:54 darrenr Exp $ + * $FreeBSD$ + */ + +#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 + +#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. + */ +#define NAT_SIZE 127 +#define RDR_SIZE 127 +#define NAT_TABLE_SZ 127 +#ifdef LARGE_NAT +#undef NAT_SIZE +#undef RDR_SIZE +#undef NAT_TABLE_SZ +#define NAT_SIZE 2047 +#define RDR_SIZE 2047 +#define NAT_TABLE_SZ 16383 +#endif +#ifndef APR_LABELLEN +#define APR_LABELLEN 16 +#endif + +#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ + +typedef struct nat { + u_long nat_age; + int nat_flags; + u_32_t nat_sumd; + u_32_t nat_ipsumd; + void *nat_data; + void *nat_aps; /* proxy session */ + frentry_t *nat_fr; /* filter rule ptr if appropriate */ + 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_tcpstate[2]; + u_char nat_p; /* protocol for NAT */ + struct ipnat *nat_ptr; /* pointer back to the rule */ + 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; + struct ipnat *in_rnext; + struct ipnat *in_mnext; + void *in_ifp; + void *in_apr; + u_long in_space; + u_int in_use; + u_int in_hits; + struct in_addr in_nextip; + u_short in_pnext; + u_short in_ppip; /* ports per IP */ + u_short in_ippip; /* IP #'s per IP# */ + u_short in_flags; /* From here to in_dport must be reflected */ + u_short in_port[2]; /* correctly in IPN_CMPSIZ */ + struct in_addr in_in[2]; + struct in_addr in_out[2]; + struct in_addr in_src[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 in_srcip in_src[0].s_addr +#define in_srcmsk in_src[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 NAT_MAPBLK 0x04 + +#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_flags)) + +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; + void *ns_apslist; + u_int ns_nattab_sz; + u_int ns_rultab_sz; + u_int ns_rdrtab_sz; + nat_t *ns_instances; +} natstat_t; + +#define IPN_ANY 0x00 +#define IPN_TCP 0x01 +#define IPN_UDP 0x02 +#define IPN_TCPUDP (IPN_TCP|IPN_UDP) +#define IPN_DELETE 0x04 +#define IPN_ICMPERR 0x08 +#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) +#define IPN_AUTOPORTMAP 0x10 +#define IPN_RANGE 0x20 +#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_RANGE) + + +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 + +#define NAT_HASH_FN(k,m) (((k) + ((k) >> 12)) % (m)) + +#define LONG_SUM(in) (((in) & 0xffff) + ((in) >> 16)) + +#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); } + + +extern u_int ipf_nattable_sz; +extern u_int ipf_natrules_sz; +extern u_int ipf_rdrrules_sz; +extern void ip_natsync __P((void *)); +extern u_long fr_defnatage; +extern u_long fr_defnaticmpage; +extern nat_t **nat_table[2]; +extern nat_t *nat_instances; +extern ipnat_t **nat_rules; +extern ipnat_t **rdr_rules; +extern natstat_t nat_stats; +#if defined(__NetBSD__) || defined(__OpenBSD__) || (__FreeBSD_version >= 300003) +extern int nat_ioctl __P((caddr_t, u_long, int)); +#else +extern int nat_ioctl __P((caddr_t, int, int)); +#endif +extern int nat_init __P((void)); +extern nat_t *nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_int, int)); +extern nat_t *nat_outlookup __P((void *, u_int, u_int, struct in_addr, + struct in_addr, u_32_t)); +extern nat_t *nat_inlookup __P((void *, u_int, u_int, struct in_addr, + struct in_addr, u_32_t)); +extern nat_t *nat_maplookup __P((void *, u_int, struct in_addr, + struct in_addr)); +extern nat_t *nat_lookupredir __P((natlookup_t *)); +extern nat_t *nat_icmpinlookup __P((ip_t *, fr_info_t *)); +extern nat_t *nat_icmpin __P((ip_t *, fr_info_t *, u_int *)); + +extern int ip_natout __P((ip_t *, fr_info_t *)); +extern int ip_natin __P((ip_t *, fr_info_t *)); +extern void ip_natunload __P((void)), ip_natexpire __P((void)); +extern void nat_log __P((struct nat *, u_int)); +extern void fix_incksum __P((u_short *, u_32_t)); +extern void fix_outcksum __P((u_short *, u_32_t)); + +#endif /* __IP_NAT_H__ */ |
