diff options
Diffstat (limited to 'sys/contrib/ipfilter/netinet/ip_nat.h')
| -rw-r--r-- | sys/contrib/ipfilter/netinet/ip_nat.h | 215 |
1 files changed, 164 insertions, 51 deletions
diff --git a/sys/contrib/ipfilter/netinet/ip_nat.h b/sys/contrib/ipfilter/netinet/ip_nat.h index 49f5d50..f1a339f 100644 --- a/sys/contrib/ipfilter/netinet/ip_nat.h +++ b/sys/contrib/ipfilter/netinet/ip_nat.h @@ -1,12 +1,12 @@ /* - * Copyright (C) 1995-1997 by Darren Reed. + * Copyright (C) 1995-2000 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 2.0.2.23.2.3 1998/05/23 18:52:44 darrenr Exp $ + * $Id: ip_nat.h,v 2.17.2.1 2000/05/15 06:50:14 darrenr Exp $ */ #ifndef __IP_NAT_H__ @@ -17,71 +17,104 @@ #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) +#define SIOCADNAT _IOW('r', 60, struct ipnat *) +#define SIOCRMNAT _IOW('r', 61, struct ipnat *) +#define SIOCGNATS _IOWR('r', 62, struct natstat *) +#define SIOCGNATL _IOWR('r', 63, struct natlookup *) #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) +#define SIOCADNAT _IOW(r, 60, struct ipnat *) +#define SIOCRMNAT _IOW(r, 61, struct ipnat *) +#define SIOCGNATS _IOWR(r, 62, struct natstat *) +#define SIOCGNATL _IOWR(r, 63, struct natlookup *) #endif -#define NAT_SIZE 367 +#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 HOSTMAP_SIZE 127 +#define NAT_TABLE_SZ 127 +#ifdef LARGE_NAT +#undef NAT_SIZE +#undef RDR_SIZE +#undef NAT_TABLE_SZ +#undef HOSTMAP_SIZE 127 +#define NAT_SIZE 2047 +#define RDR_SIZE 2047 +#define NAT_TABLE_SZ 16383 +#define HOSTMAP_SIZE 8191 +#endif #ifndef APR_LABELLEN #define APR_LABELLEN 16 #endif +#define NAT_HW_CKSUM 0x80000000 + +#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */ + +struct ap_session; typedef struct nat { u_long nat_age; int nat_flags; - u_32_t nat_sumd; + u_32_t nat_sumd[2]; u_32_t nat_ipsumd; void *nat_data; + struct ap_session *nat_aps; /* proxy session */ + struct frentry *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_oport; /* other port */ u_short nat_inport; u_short nat_outport; u_short nat_use; - u_char nat_state[2]; - struct ipnat *nat_ptr; + u_char nat_tcpstate[2]; + u_char nat_p; /* protocol for NAT */ + struct ipnat *nat_ptr; /* pointer back to the rule */ + struct hostmap *nat_hm; struct nat *nat_next; struct nat *nat_hnext[2]; struct nat **nat_hstart[2]; void *nat_ifp; int nat_dir; + char nat_ifname[IFNAMSIZ]; +#if SOLARIS || defined(_sgi) + kmutex_t nat_lock; +#endif } nat_t; typedef struct ipnat { struct ipnat *in_next; + struct ipnat *in_rnext; + struct ipnat **in_prnext; + struct ipnat *in_mnext; + struct ipnat **in_pmnext; void *in_ifp; void *in_apr; - u_int in_space; + u_long in_space; u_int in_use; + u_int in_hits; struct in_addr in_nextip; u_short in_pnext; - u_short in_flags; - u_short in_port[2]; + 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]; + struct frtuc in_tuc; 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 */ @@ -91,6 +124,14 @@ typedef struct ipnat { #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 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_sport in_tuc.ftu_sport +#define in_dport in_tuc.ftu_dport #define NAT_OUTBOUND 0 #define NAT_INBOUND 1 @@ -98,9 +139,12 @@ typedef struct ipnat { #define NAT_MAP 0x01 #define NAT_REDIRECT 0x02 #define NAT_BIMAP (NAT_MAP|NAT_REDIRECT) +#define NAT_MAPBLK 0x04 -#define IPN_CMPSIZ (sizeof(struct in_addr) * 4 + sizeof(u_short) * 3 + \ - sizeof(int) + IFNAMSIZ + APR_LABELLEN + sizeof(char)) +#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; @@ -112,6 +156,34 @@ typedef struct natlookup { u_short nl_realport; } natlookup_t; + +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; + + +typedef struct hostmap { + struct hostmap *hm_next; + struct hostmap **hm_pnext; + struct ipnat *hm_ipnat; + struct in_addr hm_realip; + struct in_addr hm_mapip; + int hm_ref; +} hostmap_t; + + typedef struct natstat { u_long ns_mapped[2]; u_long ns_rules; @@ -120,16 +192,31 @@ typedef struct natstat { u_long ns_inuse; u_long ns_logged; u_long ns_logfail; + u_long ns_memfail; + u_long ns_badnat; 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 0x03 -#define IPN_DELETE 0x04 -#define IPN_ICMPERR 0x08 +#define IPN_ANY 0x000 +#define IPN_TCP 0x001 +#define IPN_UDP 0x002 +#define IPN_TCPUDP (IPN_TCP|IPN_UDP) +#define IPN_DELETE 0x004 +#define IPN_ICMPERR 0x008 +#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR) +#define IPN_AUTOPORTMAP 0x010 +#define IPN_IPRANGE 0x020 +#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_IPRANGE|\ + IPN_SPLIT|IPN_ROUNDR|IPN_FILTER) +#define IPN_FILTER 0x040 +#define IPN_SPLIT 0x080 +#define IPN_ROUNDR 0x100 typedef struct natlog { @@ -143,6 +230,7 @@ typedef struct natlog { int nl_rule; U_QUAD_T nl_pkts; U_QUAD_T nl_bytes; + u_char nl_p; } natlog_t; @@ -150,32 +238,57 @@ typedef struct natlog { #define NL_NEWRDR NAT_REDIRECT #define NL_EXPIRE 0xffff +#define NAT_HASH_FN(k,l,m) (((k) + ((k) >> 12) + l) % (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 int fr_nat_lock; 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 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 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 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_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 nat_t *nat_icmplookup __P((ip_t *, fr_info_t *, int)); +extern nat_t *nat_icmp __P((ip_t *, fr_info_t *, u_int *, int)); +extern void nat_insert __P((nat_t *)); -extern int ip_natout __P((ip_t *, int, fr_info_t *)); -extern int ip_natin __P((ip_t *, int, fr_info_t *)); +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_short)); -extern void fix_incksum __P((u_short *, u_32_t)); -extern void fix_outcksum __P((u_short *, u_32_t)); +extern void nat_log __P((struct nat *, u_int)); +extern void fix_incksum __P((u_short *, u_32_t, int)); +extern void fix_outcksum __P((u_short *, u_32_t, int)); #endif /* __IP_NAT_H__ */ |
