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1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2015-2019 Yandex LLC
5  * Copyright (c) 2015 Alexander V. Chernikov <melifaro@FreeBSD.org>
6  * Copyright (c) 2015-2019 Andrey V. Elsukov <ae@FreeBSD.org>
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31
32 #ifndef _NETINET6_IP_FW_NAT64_H_
33 #define _NETINET6_IP_FW_NAT64_H_
34
35 struct ipfw_nat64stl_stats {
36         uint64_t        opcnt64;        /* 6to4 of packets translated */
37         uint64_t        opcnt46;        /* 4to6 of packets translated */
38         uint64_t        ofrags;         /* number of fragments generated */
39         uint64_t        ifrags;         /* number of fragments received */
40         uint64_t        oerrors;        /* number of output errors */
41         uint64_t        noroute4;
42         uint64_t        noroute6;
43         uint64_t        noproto;        /* Protocol not supported */
44         uint64_t        nomem;          /* mbuf allocation failed */
45         uint64_t        dropped;        /* dropped due to some errors */
46 };
47
48 struct ipfw_nat64clat_stats {
49         uint64_t        opcnt64;        /* 6to4 of packets translated */
50         uint64_t        opcnt46;        /* 4to6 of packets translated */
51         uint64_t        ofrags;         /* number of fragments generated */
52         uint64_t        ifrags;         /* number of fragments received */
53         uint64_t        oerrors;        /* number of output errors */
54         uint64_t        noroute4;
55         uint64_t        noroute6;
56         uint64_t        noproto;        /* Protocol not supported */
57         uint64_t        nomem;          /* mbuf allocation failed */
58         uint64_t        dropped;        /* dropped due to some errors */
59 };
60
61 struct ipfw_nat64lsn_stats {
62         uint64_t        opcnt64;        /* 6to4 of packets translated */
63         uint64_t        opcnt46;        /* 4to6 of packets translated */
64         uint64_t        ofrags;         /* number of fragments generated */
65         uint64_t        ifrags;         /* number of fragments received */
66         uint64_t        oerrors;        /* number of output errors */
67         uint64_t        noroute4;
68         uint64_t        noroute6;
69         uint64_t        noproto;        /* Protocol not supported */
70         uint64_t        nomem;          /* mbuf allocation failed */
71         uint64_t        dropped;        /* dropped due to some errors */
72
73         uint64_t        nomatch4;       /* No addr/port match */
74         uint64_t        jcalls;         /* Number of job handler calls */
75         uint64_t        jrequests;      /* Number of job requests */
76         uint64_t        jhostsreq;      /* Number of job host requests */
77         uint64_t        jportreq;       /* Number of portgroup requests */
78         uint64_t        jhostfails;     /* Number of failed host allocs */
79         uint64_t        jportfails;     /* Number of failed portgroup allocs */
80         uint64_t        jreinjected;    /* Number of packets reinjected to q */
81         uint64_t        jmaxlen;        /* Max queue length reached */
82         uint64_t        jnomem;         /* No memory to alloc queue item */
83
84         uint64_t        screated;       /* Number of states created */
85         uint64_t        sdeleted;       /* Number of states deleted */
86         uint64_t        spgcreated;     /* Number of portgroups created */
87         uint64_t        spgdeleted;     /* Number of portgroups deleted */
88         uint64_t        hostcount;      /* Number of hosts  */
89         uint64_t        tcpchunks;      /* Number of TCP chunks */
90         uint64_t        udpchunks;      /* Number of UDP chunks */
91         uint64_t        icmpchunks;     /* Number of ICMP chunks */
92
93         uint64_t        _reserved[4];
94 };
95
96 #define NAT64_LOG               0x0001  /* Enable logging via BPF */
97 #define NAT64_ALLOW_PRIVATE     0x0002  /* Allow private IPv4 address
98                                          * translation
99                                          */
100 typedef struct _ipfw_nat64stl_cfg {
101         char            name[64];       /* NAT name                     */
102         ipfw_obj_ntlv   ntlv6;          /* object name tlv              */
103         ipfw_obj_ntlv   ntlv4;          /* object name tlv              */
104         struct in6_addr prefix6;        /* NAT64 prefix */
105         uint8_t         plen6;          /* Prefix length */
106         uint8_t         set;            /* Named instance set [0..31] */
107         uint8_t         spare[2];
108         uint32_t        flags;
109 } ipfw_nat64stl_cfg;
110
111 typedef struct _ipfw_nat64clat_cfg {
112         char            name[64];       /* NAT name                     */
113         struct in6_addr plat_prefix;    /* NAT64 (PLAT) prefix */
114         struct in6_addr clat_prefix;    /* Client (CLAT) prefix */
115         uint8_t         plat_plen;      /* PLAT Prefix length */
116         uint8_t         clat_plen;      /* CLAT Prefix length */
117         uint8_t         set;            /* Named instance set [0..31] */
118         uint8_t         spare;
119         uint32_t        flags;
120 } ipfw_nat64clat_cfg;
121
122 /*
123  * NAT64LSN default configuration values
124  */
125 #define NAT64LSN_MAX_PORTS      2048    /* Unused */
126 #define NAT64LSN_JMAXLEN        2048    /* Max outstanding requests. */
127 #define NAT64LSN_TCP_SYN_AGE    10      /* State's TTL after SYN received. */
128 #define NAT64LSN_TCP_EST_AGE    (2 * 3600) /* TTL for established connection */
129 #define NAT64LSN_TCP_FIN_AGE    180     /* State's TTL after FIN/RST received */
130 #define NAT64LSN_UDP_AGE        120     /* TTL for UDP states */
131 #define NAT64LSN_ICMP_AGE       60      /* TTL for ICMP states */
132 #define NAT64LSN_HOST_AGE       3600    /* TTL for stale host entry */
133 #define NAT64LSN_PG_AGE         900     /* TTL for stale ports groups */
134
135 typedef struct _ipfw_nat64lsn_cfg {
136         char            name[64];       /* NAT name                     */
137         uint32_t        flags;
138
139         uint32_t        max_ports;      /* Unused */
140         uint32_t        agg_prefix_len; /* Unused */
141         uint32_t        agg_prefix_max; /* Unused */
142
143         struct in_addr  prefix4;
144         uint16_t        plen4;          /* Prefix length */
145         uint16_t        plen6;          /* Prefix length */
146         struct in6_addr prefix6;        /* NAT64 prefix */
147         uint32_t        jmaxlen;        /* Max jobqueue length */
148
149         uint16_t        min_port;       /* Unused */
150         uint16_t        max_port;       /* Unused */
151
152         uint16_t        nh_delete_delay;/* Stale host delete delay */
153         uint16_t        pg_delete_delay;/* Stale portgroup delete delay */
154         uint16_t        st_syn_ttl;     /* TCP syn expire */
155         uint16_t        st_close_ttl;   /* TCP fin expire */
156         uint16_t        st_estab_ttl;   /* TCP established expire */
157         uint16_t        st_udp_ttl;     /* UDP expire */
158         uint16_t        st_icmp_ttl;    /* ICMP expire */
159         uint8_t         set;            /* Named instance set [0..31] */
160         uint8_t         states_chunks;  /* Number of states chunks per PG */
161 } ipfw_nat64lsn_cfg;
162
163 typedef struct _ipfw_nat64lsn_state {
164         struct in_addr  daddr;          /* Remote IPv4 address */
165         uint16_t        dport;          /* Remote destination port */
166         uint16_t        aport;          /* Local alias port */
167         uint16_t        sport;          /* Source port */
168         uint8_t         flags;          /* State flags */
169         uint8_t         spare[3];
170         uint16_t        idle;           /* Last used time */
171 } ipfw_nat64lsn_state;
172
173 typedef struct _ipfw_nat64lsn_stg {
174         uint64_t        next_idx;       /* next state index */
175         struct in_addr  alias4;         /* IPv4 alias address */
176         uint8_t         proto;          /* protocol */
177         uint8_t         flags;
178         uint16_t        spare;
179         struct in6_addr host6;          /* Bound IPv6 host */
180         uint32_t        count;          /* Number of states */
181         uint32_t        spare2;
182 } ipfw_nat64lsn_stg;
183
184 typedef struct _ipfw_nat64lsn_state_v1 {
185         struct in6_addr host6;          /* Bound IPv6 host */
186         struct in_addr  daddr;          /* Remote IPv4 address */
187         uint16_t        dport;          /* Remote destination port */
188         uint16_t        aport;          /* Local alias port */
189         uint16_t        sport;          /* Source port */
190         uint16_t        spare;
191         uint16_t        idle;           /* Last used time */
192         uint8_t         flags;          /* State flags */
193         uint8_t         proto;          /* protocol */
194 } ipfw_nat64lsn_state_v1;
195
196 typedef struct _ipfw_nat64lsn_stg_v1 {
197         union nat64lsn_pgidx {
198                 uint64_t        index;
199                 struct {
200                         uint8_t         chunk;  /* states chunk */
201                         uint8_t         proto;  /* protocol */
202                         uint16_t        port;   /* base port */
203                         in_addr_t       addr;   /* alias address */
204                 };
205         } next;                         /* next state index */
206         struct in_addr  alias4;         /* IPv4 alias address */
207         uint32_t        count;          /* Number of states */
208 } ipfw_nat64lsn_stg_v1;
209
210 #endif /* _NETINET6_IP_FW_NAT64_H_ */