diff options
Diffstat (limited to 'contrib/ipfilter/ip_nat.h')
| -rw-r--r-- | contrib/ipfilter/ip_nat.h | 113 |
1 files changed, 89 insertions, 24 deletions
diff --git a/contrib/ipfilter/ip_nat.h b/contrib/ipfilter/ip_nat.h index 49f5d50..137f3d6 100644 --- a/contrib/ipfilter/ip_nat.h +++ b/contrib/ipfilter/ip_nat.h @@ -1,12 +1,12 @@ /* - * Copyright (C) 1995-1997 by Darren Reed. + * 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 2.0.2.23.2.3 1998/05/23 18:52:44 darrenr Exp $ + * $Id: ip_nat.h,v 2.1.2.1 1999/08/14 04:47:54 darrenr Exp $ */ #ifndef __IP_NAT_H__ @@ -36,28 +36,50 @@ #define SIOCCNATL _IOWR(r, 87, int) #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 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_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 nat *nat_next; struct nat *nat_hnext[2]; struct nat **nat_hstart[2]; @@ -67,16 +89,22 @@ typedef struct nat { typedef struct ipnat { struct ipnat *in_next; + struct ipnat *in_rnext; + struct ipnat *in_mnext; 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]; 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 */ @@ -91,6 +119,8 @@ 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 NAT_OUTBOUND 0 #define NAT_INBOUND 1 @@ -98,9 +128,12 @@ typedef struct ipnat { #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(struct in_addr) * 4 + sizeof(u_short) * 3 + \ - sizeof(int) + IFNAMSIZ + APR_LABELLEN + sizeof(char)) +#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_flags)) typedef struct natlookup { struct in_addr nl_inip; @@ -122,14 +155,23 @@ typedef struct natstat { 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 0x03 +#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 { @@ -150,31 +192,54 @@ typedef struct natlog { #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][NAT_SIZE]; +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__) 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_icmpin __P((ip_t *, fr_info_t *, u_int *)); -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 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)); |
