1/*
2 * Copyright (C) 1995-2000 by Darren Reed.
3 *
4 * Redistribution and use in source and binary forms are permitted
5 * provided that this notice is preserved and due credit is given
6 * to the original author and the contributors.
7 *
8 * @(#)ip_nat.h 1.5 2/4/96
| 1/*
2 * Copyright (C) 1995-2000 by Darren Reed.
3 *
4 * Redistribution and use in source and binary forms are permitted
5 * provided that this notice is preserved and due credit is given
6 * to the original author and the contributors.
7 *
8 * @(#)ip_nat.h 1.5 2/4/96
|
9 * $Id: ip_nat.h,v 2.1.2.3 2000/01/24 12:44:24 darrenr Exp $
10 * $FreeBSD: head/sys/contrib/ipfilter/netinet/ip_nat.h 60857 2000-05-24 04:40:17Z darrenr $
| 9 * $Id: ip_nat.h,v 2.17.2.6 2000/07/15 14:50:06 darrenr Exp $
10 * $FreeBSD: head/sys/contrib/ipfilter/netinet/ip_nat.h 63523 2000-07-19 14:02:09Z darrenr $
|
11 */
12
13#ifndef __IP_NAT_H__
14#define __IP_NAT_H__
15
16#ifndef SOLARIS
17#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
18#endif
19
20#if defined(__STDC__) || defined(__GNUC__)
21#define SIOCADNAT _IOW('r', 60, struct ipnat *)
22#define SIOCRMNAT _IOW('r', 61, struct ipnat *)
23#define SIOCGNATS _IOWR('r', 62, struct natstat *)
24#define SIOCGNATL _IOWR('r', 63, struct natlookup *)
25#else
26#define SIOCADNAT _IOW(r, 60, struct ipnat *)
27#define SIOCRMNAT _IOW(r, 61, struct ipnat *)
28#define SIOCGNATS _IOWR(r, 62, struct natstat *)
29#define SIOCGNATL _IOWR(r, 63, struct natlookup *)
30#endif
31
32#undef LARGE_NAT /* define this if you're setting up a system to NAT
33 * LARGE numbers of networks/hosts - i.e. in the
34 * hundreds or thousands. In such a case, you should
35 * also change the RDR_SIZE and NAT_SIZE below to more
36 * appropriate sizes. The figures below were used for
37 * a setup with 1000-2000 networks to NAT.
38 */
39#define NAT_SIZE 127
40#define RDR_SIZE 127
41#define HOSTMAP_SIZE 127
42#define NAT_TABLE_SZ 127
43#ifdef LARGE_NAT
44#undef NAT_SIZE
45#undef RDR_SIZE
46#undef NAT_TABLE_SZ
47#undef HOSTMAP_SIZE 127
48#define NAT_SIZE 2047
49#define RDR_SIZE 2047
50#define NAT_TABLE_SZ 16383
51#define HOSTMAP_SIZE 8191
52#endif
53#ifndef APR_LABELLEN
54#define APR_LABELLEN 16
55#endif
56#define NAT_HW_CKSUM 0x80000000
57
58#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */
59
60struct ap_session;
61
62typedef struct nat {
63 u_long nat_age;
64 int nat_flags;
65 u_32_t nat_sumd[2];
66 u_32_t nat_ipsumd;
67 void *nat_data;
68 struct ap_session *nat_aps; /* proxy session */
69 struct frentry *nat_fr; /* filter rule ptr if appropriate */
70 struct in_addr nat_inip;
71 struct in_addr nat_outip;
72 struct in_addr nat_oip; /* other ip */
73 U_QUAD_T nat_pkts;
74 U_QUAD_T nat_bytes;
75 u_short nat_oport; /* other port */
76 u_short nat_inport;
77 u_short nat_outport;
78 u_short nat_use;
79 u_char nat_tcpstate[2];
80 u_char nat_p; /* protocol for NAT */
81 struct ipnat *nat_ptr; /* pointer back to the rule */
82 struct hostmap *nat_hm;
83 struct nat *nat_next;
84 struct nat *nat_hnext[2];
85 struct nat **nat_hstart[2];
86 void *nat_ifp;
87 int nat_dir;
88 char nat_ifname[IFNAMSIZ];
89#if SOLARIS || defined(_sgi)
90 kmutex_t nat_lock;
91#endif
92} nat_t;
93
94typedef struct ipnat {
95 struct ipnat *in_next;
96 struct ipnat *in_rnext;
97 struct ipnat **in_prnext;
98 struct ipnat *in_mnext;
99 struct ipnat **in_pmnext;
100 void *in_ifp;
101 void *in_apr;
102 u_long in_space;
103 u_int in_use;
104 u_int in_hits;
105 struct in_addr in_nextip;
106 u_short in_pnext;
| 11 */
12
13#ifndef __IP_NAT_H__
14#define __IP_NAT_H__
15
16#ifndef SOLARIS
17#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
18#endif
19
20#if defined(__STDC__) || defined(__GNUC__)
21#define SIOCADNAT _IOW('r', 60, struct ipnat *)
22#define SIOCRMNAT _IOW('r', 61, struct ipnat *)
23#define SIOCGNATS _IOWR('r', 62, struct natstat *)
24#define SIOCGNATL _IOWR('r', 63, struct natlookup *)
25#else
26#define SIOCADNAT _IOW(r, 60, struct ipnat *)
27#define SIOCRMNAT _IOW(r, 61, struct ipnat *)
28#define SIOCGNATS _IOWR(r, 62, struct natstat *)
29#define SIOCGNATL _IOWR(r, 63, struct natlookup *)
30#endif
31
32#undef LARGE_NAT /* define this if you're setting up a system to NAT
33 * LARGE numbers of networks/hosts - i.e. in the
34 * hundreds or thousands. In such a case, you should
35 * also change the RDR_SIZE and NAT_SIZE below to more
36 * appropriate sizes. The figures below were used for
37 * a setup with 1000-2000 networks to NAT.
38 */
39#define NAT_SIZE 127
40#define RDR_SIZE 127
41#define HOSTMAP_SIZE 127
42#define NAT_TABLE_SZ 127
43#ifdef LARGE_NAT
44#undef NAT_SIZE
45#undef RDR_SIZE
46#undef NAT_TABLE_SZ
47#undef HOSTMAP_SIZE 127
48#define NAT_SIZE 2047
49#define RDR_SIZE 2047
50#define NAT_TABLE_SZ 16383
51#define HOSTMAP_SIZE 8191
52#endif
53#ifndef APR_LABELLEN
54#define APR_LABELLEN 16
55#endif
56#define NAT_HW_CKSUM 0x80000000
57
58#define DEF_NAT_AGE 1200 /* 10 minutes (600 seconds) */
59
60struct ap_session;
61
62typedef struct nat {
63 u_long nat_age;
64 int nat_flags;
65 u_32_t nat_sumd[2];
66 u_32_t nat_ipsumd;
67 void *nat_data;
68 struct ap_session *nat_aps; /* proxy session */
69 struct frentry *nat_fr; /* filter rule ptr if appropriate */
70 struct in_addr nat_inip;
71 struct in_addr nat_outip;
72 struct in_addr nat_oip; /* other ip */
73 U_QUAD_T nat_pkts;
74 U_QUAD_T nat_bytes;
75 u_short nat_oport; /* other port */
76 u_short nat_inport;
77 u_short nat_outport;
78 u_short nat_use;
79 u_char nat_tcpstate[2];
80 u_char nat_p; /* protocol for NAT */
81 struct ipnat *nat_ptr; /* pointer back to the rule */
82 struct hostmap *nat_hm;
83 struct nat *nat_next;
84 struct nat *nat_hnext[2];
85 struct nat **nat_hstart[2];
86 void *nat_ifp;
87 int nat_dir;
88 char nat_ifname[IFNAMSIZ];
89#if SOLARIS || defined(_sgi)
90 kmutex_t nat_lock;
91#endif
92} nat_t;
93
94typedef struct ipnat {
95 struct ipnat *in_next;
96 struct ipnat *in_rnext;
97 struct ipnat **in_prnext;
98 struct ipnat *in_mnext;
99 struct ipnat **in_pmnext;
100 void *in_ifp;
101 void *in_apr;
102 u_long in_space;
103 u_int in_use;
104 u_int in_hits;
105 struct in_addr in_nextip;
106 u_short in_pnext;
|
107 u_short in_ppip; /* ports per IP */
| |
108 u_short in_ippip; /* IP #'s per IP# */
| 107 u_short in_ippip; /* IP #'s per IP# */
|
109 u_short in_flags; /* From here to in_dport must be reflected */
| 108 u_32_t in_flags; /* From here to in_dport must be reflected */
109 u_short in_spare;
110 u_short in_ppip; /* ports per IP */
|
110 u_short in_port[2]; /* correctly in IPN_CMPSIZ */
111 struct in_addr in_in[2];
112 struct in_addr in_out[2];
113 struct in_addr in_src[2];
114 struct frtuc in_tuc;
115 int in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
116 char in_ifname[IFNAMSIZ];
117 char in_plabel[APR_LABELLEN]; /* proxy label */
118 char in_p; /* protocol */
119} ipnat_t;
120
121#define in_pmin in_port[0] /* Also holds static redir port */
122#define in_pmax in_port[1]
123#define in_nip in_nextip.s_addr
124#define in_inip in_in[0].s_addr
125#define in_inmsk in_in[1].s_addr
126#define in_outip in_out[0].s_addr
127#define in_outmsk in_out[1].s_addr
128#define in_srcip in_src[0].s_addr
129#define in_srcmsk in_src[1].s_addr
130#define in_scmp in_tuc.ftu_scmp
131#define in_dcmp in_tuc.ftu_dcmp
132#define in_stop in_tuc.ftu_stop
133#define in_dtop in_tuc.ftu_dtop
134#define in_sport in_tuc.ftu_sport
135#define in_dport in_tuc.ftu_dport
136
137#define NAT_OUTBOUND 0
138#define NAT_INBOUND 1
139
140#define NAT_MAP 0x01
141#define NAT_REDIRECT 0x02
142#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT)
143#define NAT_MAPBLK 0x04
144
145#define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */
146#define USABLE_PORTS (65536 - MAPBLK_MINPORT)
147
148#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_flags))
149
150typedef struct natlookup {
151 struct in_addr nl_inip;
152 struct in_addr nl_outip;
153 struct in_addr nl_realip;
154 int nl_flags;
155 u_short nl_inport;
156 u_short nl_outport;
157 u_short nl_realport;
158} natlookup_t;
159
160
161typedef struct nat_save {
162 void *ipn_next;
163 struct nat ipn_nat;
164 struct ipnat ipn_ipnat;
165 struct frentry ipn_fr;
166 int ipn_dsize;
167 char ipn_data[4];
168} nat_save_t;
169
170#define ipn_rule ipn_nat.nat_fr
171
172typedef struct natget {
173 void *ng_ptr;
174 int ng_sz;
175} natget_t;
176
177
178typedef struct hostmap {
179 struct hostmap *hm_next;
180 struct hostmap **hm_pnext;
181 struct ipnat *hm_ipnat;
182 struct in_addr hm_realip;
183 struct in_addr hm_mapip;
184 int hm_ref;
185} hostmap_t;
186
187
188typedef struct natstat {
189 u_long ns_mapped[2];
190 u_long ns_rules;
191 u_long ns_added;
192 u_long ns_expire;
193 u_long ns_inuse;
194 u_long ns_logged;
195 u_long ns_logfail;
196 u_long ns_memfail;
197 u_long ns_badnat;
198 nat_t **ns_table[2];
199 ipnat_t *ns_list;
200 void *ns_apslist;
201 u_int ns_nattab_sz;
202 u_int ns_rultab_sz;
203 u_int ns_rdrtab_sz;
204 nat_t *ns_instances;
205} natstat_t;
206
207#define IPN_ANY 0x000
208#define IPN_TCP 0x001
209#define IPN_UDP 0x002
210#define IPN_TCPUDP (IPN_TCP|IPN_UDP)
211#define IPN_DELETE 0x004
212#define IPN_ICMPERR 0x008
213#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR)
214#define IPN_AUTOPORTMAP 0x010
215#define IPN_IPRANGE 0x020
| 111 u_short in_port[2]; /* correctly in IPN_CMPSIZ */
112 struct in_addr in_in[2];
113 struct in_addr in_out[2];
114 struct in_addr in_src[2];
115 struct frtuc in_tuc;
116 int in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
117 char in_ifname[IFNAMSIZ];
118 char in_plabel[APR_LABELLEN]; /* proxy label */
119 char in_p; /* protocol */
120} ipnat_t;
121
122#define in_pmin in_port[0] /* Also holds static redir port */
123#define in_pmax in_port[1]
124#define in_nip in_nextip.s_addr
125#define in_inip in_in[0].s_addr
126#define in_inmsk in_in[1].s_addr
127#define in_outip in_out[0].s_addr
128#define in_outmsk in_out[1].s_addr
129#define in_srcip in_src[0].s_addr
130#define in_srcmsk in_src[1].s_addr
131#define in_scmp in_tuc.ftu_scmp
132#define in_dcmp in_tuc.ftu_dcmp
133#define in_stop in_tuc.ftu_stop
134#define in_dtop in_tuc.ftu_dtop
135#define in_sport in_tuc.ftu_sport
136#define in_dport in_tuc.ftu_dport
137
138#define NAT_OUTBOUND 0
139#define NAT_INBOUND 1
140
141#define NAT_MAP 0x01
142#define NAT_REDIRECT 0x02
143#define NAT_BIMAP (NAT_MAP|NAT_REDIRECT)
144#define NAT_MAPBLK 0x04
145
146#define MAPBLK_MINPORT 1024 /* don't use reserved ports for src port */
147#define USABLE_PORTS (65536 - MAPBLK_MINPORT)
148
149#define IPN_CMPSIZ (sizeof(ipnat_t) - offsetof(ipnat_t, in_flags))
150
151typedef struct natlookup {
152 struct in_addr nl_inip;
153 struct in_addr nl_outip;
154 struct in_addr nl_realip;
155 int nl_flags;
156 u_short nl_inport;
157 u_short nl_outport;
158 u_short nl_realport;
159} natlookup_t;
160
161
162typedef struct nat_save {
163 void *ipn_next;
164 struct nat ipn_nat;
165 struct ipnat ipn_ipnat;
166 struct frentry ipn_fr;
167 int ipn_dsize;
168 char ipn_data[4];
169} nat_save_t;
170
171#define ipn_rule ipn_nat.nat_fr
172
173typedef struct natget {
174 void *ng_ptr;
175 int ng_sz;
176} natget_t;
177
178
179typedef struct hostmap {
180 struct hostmap *hm_next;
181 struct hostmap **hm_pnext;
182 struct ipnat *hm_ipnat;
183 struct in_addr hm_realip;
184 struct in_addr hm_mapip;
185 int hm_ref;
186} hostmap_t;
187
188
189typedef struct natstat {
190 u_long ns_mapped[2];
191 u_long ns_rules;
192 u_long ns_added;
193 u_long ns_expire;
194 u_long ns_inuse;
195 u_long ns_logged;
196 u_long ns_logfail;
197 u_long ns_memfail;
198 u_long ns_badnat;
199 nat_t **ns_table[2];
200 ipnat_t *ns_list;
201 void *ns_apslist;
202 u_int ns_nattab_sz;
203 u_int ns_rultab_sz;
204 u_int ns_rdrtab_sz;
205 nat_t *ns_instances;
206} natstat_t;
207
208#define IPN_ANY 0x000
209#define IPN_TCP 0x001
210#define IPN_UDP 0x002
211#define IPN_TCPUDP (IPN_TCP|IPN_UDP)
212#define IPN_DELETE 0x004
213#define IPN_ICMPERR 0x008
214#define IPN_RF (IPN_TCPUDP|IPN_DELETE|IPN_ICMPERR)
215#define IPN_AUTOPORTMAP 0x010
216#define IPN_IPRANGE 0x020
|
216#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_IPRANGE|\
217 IPN_SPLIT|IPN_ROUNDR|IPN_FILTER)
| 217#define IPN_USERFLAGS (IPN_TCPUDP|IPN_AUTOPORTMAP|IPN_IPRANGE|IPN_SPLIT|\
218 IPN_ROUNDR|IPN_FILTER|IPN_NOTSRC|IPN_NOTDST)
|
218#define IPN_FILTER 0x040
219#define IPN_SPLIT 0x080
220#define IPN_ROUNDR 0x100
| 219#define IPN_FILTER 0x040
220#define IPN_SPLIT 0x080
221#define IPN_ROUNDR 0x100
|
| 222#define IPN_NOTSRC 0x080000
223#define IPN_NOTDST 0x100000
|
221
222
223typedef struct natlog {
224 struct in_addr nl_origip;
225 struct in_addr nl_outip;
226 struct in_addr nl_inip;
227 u_short nl_origport;
228 u_short nl_outport;
229 u_short nl_inport;
230 u_short nl_type;
231 int nl_rule;
232 U_QUAD_T nl_pkts;
233 U_QUAD_T nl_bytes;
234 u_char nl_p;
235} natlog_t;
236
237
238#define NL_NEWMAP NAT_MAP
239#define NL_NEWRDR NAT_REDIRECT
| 224
225
226typedef struct natlog {
227 struct in_addr nl_origip;
228 struct in_addr nl_outip;
229 struct in_addr nl_inip;
230 u_short nl_origport;
231 u_short nl_outport;
232 u_short nl_inport;
233 u_short nl_type;
234 int nl_rule;
235 U_QUAD_T nl_pkts;
236 U_QUAD_T nl_bytes;
237 u_char nl_p;
238} natlog_t;
239
240
241#define NL_NEWMAP NAT_MAP
242#define NL_NEWRDR NAT_REDIRECT
|
| 243#define NL_NEWBIMAP NAT_BIMAP
244#define NL_NEWBLOCK NAT_MAPBLK
|
240#define NL_EXPIRE 0xffff
241
242#define NAT_HASH_FN(k,l,m) (((k) + ((k) >> 12) + l) % (m))
243
244#define LONG_SUM(in) (((in) & 0xffff) + ((in) >> 16))
245
246#define CALC_SUMD(s1, s2, sd) { \
247 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \
248 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \
249 /* Do it twice */ \
250 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \
251 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \
252 /* Because ~1 == -2, We really need ~1 == -1 */ \
253 if ((s1) > (s2)) (s2)--; \
254 (sd) = (s2) - (s1); \
255 (sd) = ((sd) & 0xffff) + ((sd) >> 16); }
256
257
258extern u_int ipf_nattable_sz;
259extern u_int ipf_natrules_sz;
260extern u_int ipf_rdrrules_sz;
261extern int fr_nat_lock;
262extern void ip_natsync __P((void *));
263extern u_long fr_defnatage;
264extern u_long fr_defnaticmpage;
265extern nat_t **nat_table[2];
266extern nat_t *nat_instances;
267extern ipnat_t **nat_rules;
268extern ipnat_t **rdr_rules;
269extern natstat_t nat_stats;
270#if defined(__NetBSD__) || defined(__OpenBSD__) || (__FreeBSD_version >= 300003)
271extern int nat_ioctl __P((caddr_t, u_long, int));
272#else
273extern int nat_ioctl __P((caddr_t, int, int));
274#endif
275extern int nat_init __P((void));
276extern nat_t *nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_int, int));
277extern nat_t *nat_outlookup __P((void *, u_int, u_int, struct in_addr,
278 struct in_addr, u_32_t));
279extern nat_t *nat_inlookup __P((void *, u_int, u_int, struct in_addr,
280 struct in_addr, u_32_t));
281extern nat_t *nat_maplookup __P((void *, u_int, struct in_addr,
282 struct in_addr));
283extern nat_t *nat_lookupredir __P((natlookup_t *));
284extern nat_t *nat_icmplookup __P((ip_t *, fr_info_t *, int));
285extern nat_t *nat_icmp __P((ip_t *, fr_info_t *, u_int *, int));
286extern void nat_insert __P((nat_t *));
287
288extern int ip_natout __P((ip_t *, fr_info_t *));
289extern int ip_natin __P((ip_t *, fr_info_t *));
290extern void ip_natunload __P((void)), ip_natexpire __P((void));
291extern void nat_log __P((struct nat *, u_int));
292extern void fix_incksum __P((u_short *, u_32_t, int));
293extern void fix_outcksum __P((u_short *, u_32_t, int));
294
295#endif /* __IP_NAT_H__ */
| 245#define NL_EXPIRE 0xffff
246
247#define NAT_HASH_FN(k,l,m) (((k) + ((k) >> 12) + l) % (m))
248
249#define LONG_SUM(in) (((in) & 0xffff) + ((in) >> 16))
250
251#define CALC_SUMD(s1, s2, sd) { \
252 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \
253 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \
254 /* Do it twice */ \
255 (s1) = ((s1) & 0xffff) + ((s1) >> 16); \
256 (s2) = ((s2) & 0xffff) + ((s2) >> 16); \
257 /* Because ~1 == -2, We really need ~1 == -1 */ \
258 if ((s1) > (s2)) (s2)--; \
259 (sd) = (s2) - (s1); \
260 (sd) = ((sd) & 0xffff) + ((sd) >> 16); }
261
262
263extern u_int ipf_nattable_sz;
264extern u_int ipf_natrules_sz;
265extern u_int ipf_rdrrules_sz;
266extern int fr_nat_lock;
267extern void ip_natsync __P((void *));
268extern u_long fr_defnatage;
269extern u_long fr_defnaticmpage;
270extern nat_t **nat_table[2];
271extern nat_t *nat_instances;
272extern ipnat_t **nat_rules;
273extern ipnat_t **rdr_rules;
274extern natstat_t nat_stats;
275#if defined(__NetBSD__) || defined(__OpenBSD__) || (__FreeBSD_version >= 300003)
276extern int nat_ioctl __P((caddr_t, u_long, int));
277#else
278extern int nat_ioctl __P((caddr_t, int, int));
279#endif
280extern int nat_init __P((void));
281extern nat_t *nat_new __P((ipnat_t *, ip_t *, fr_info_t *, u_int, int));
282extern nat_t *nat_outlookup __P((void *, u_int, u_int, struct in_addr,
283 struct in_addr, u_32_t));
284extern nat_t *nat_inlookup __P((void *, u_int, u_int, struct in_addr,
285 struct in_addr, u_32_t));
286extern nat_t *nat_maplookup __P((void *, u_int, struct in_addr,
287 struct in_addr));
288extern nat_t *nat_lookupredir __P((natlookup_t *));
289extern nat_t *nat_icmplookup __P((ip_t *, fr_info_t *, int));
290extern nat_t *nat_icmp __P((ip_t *, fr_info_t *, u_int *, int));
291extern void nat_insert __P((nat_t *));
292
293extern int ip_natout __P((ip_t *, fr_info_t *));
294extern int ip_natin __P((ip_t *, fr_info_t *));
295extern void ip_natunload __P((void)), ip_natexpire __P((void));
296extern void nat_log __P((struct nat *, u_int));
297extern void fix_incksum __P((u_short *, u_32_t, int));
298extern void fix_outcksum __P((u_short *, u_32_t, int));
299
300#endif /* __IP_NAT_H__ */
|