The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/ip_fw_nat64.h

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    1 /*-
    2  * Copyright (c) 2015 Yandex LLC
    3  * Copyright (c) 2015 Alexander V. Chernikov <melifaro@FreeBSD.org>
    4  * Copyright (c) 2016 Andrey V. Elsukov <ae@FreeBSD.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  *
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/12.0/sys/netinet6/ip_fw_nat64.h 304046 2016-08-13 16:09:49Z ae $
   29  */
   30 
   31 #ifndef _NETINET6_IP_FW_NAT64_H_
   32 #define _NETINET6_IP_FW_NAT64_H_
   33 
   34 struct ipfw_nat64stl_stats {
   35         uint64_t        opcnt64;        /* 6to4 of packets translated */
   36         uint64_t        opcnt46;        /* 4to6 of packets translated */
   37         uint64_t        ofrags;         /* number of fragments generated */
   38         uint64_t        ifrags;         /* number of fragments received */
   39         uint64_t        oerrors;        /* number of output errors */
   40         uint64_t        noroute4;
   41         uint64_t        noroute6;
   42         uint64_t        noproto;        /* Protocol not supported */
   43         uint64_t        nomem;          /* mbuf allocation filed */
   44         uint64_t        dropped;        /* dropped due to some errors */
   45 };
   46 
   47 struct ipfw_nat64lsn_stats {
   48         uint64_t        opcnt64;        /* 6to4 of packets translated */
   49         uint64_t        opcnt46;        /* 4to6 of packets translated */
   50         uint64_t        ofrags;         /* number of fragments generated */
   51         uint64_t        ifrags;         /* number of fragments received */
   52         uint64_t        oerrors;        /* number of output errors */
   53         uint64_t        noroute4;
   54         uint64_t        noroute6;
   55         uint64_t        noproto;        /* Protocol not supported */
   56         uint64_t        nomem;          /* mbuf allocation filed */
   57         uint64_t        dropped;        /* dropped due to some errors */
   58 
   59         uint64_t        nomatch4;       /* No addr/port match */
   60         uint64_t        jcalls;         /* Number of job handler calls */
   61         uint64_t        jrequests;      /* Number of job requests */
   62         uint64_t        jhostsreq;      /* Number of job host requests */
   63         uint64_t        jportreq;       /* Number of portgroup requests */
   64         uint64_t        jhostfails;     /* Number of failed host allocs */
   65         uint64_t        jportfails;     /* Number of failed portgroup allocs */
   66         uint64_t        jreinjected;    /* Number of packets reinjected to q */
   67         uint64_t        jmaxlen;        /* Max queue length reached */
   68         uint64_t        jnomem;         /* No memory to alloc queue item */
   69 
   70         uint64_t        screated;       /* Number of states created */
   71         uint64_t        sdeleted;       /* Number of states deleted */
   72         uint64_t        spgcreated;     /* Number of portgroups created */
   73         uint64_t        spgdeleted;     /* Number of portgroups deleted */
   74         uint64_t        hostcount;      /* Number of hosts  */
   75         uint64_t        tcpchunks;      /* Number of TCP chunks */
   76         uint64_t        udpchunks;      /* Number of UDP chunks */
   77         uint64_t        icmpchunks;     /* Number of ICMP chunks */
   78 
   79         uint64_t        _reserved[4];
   80 };
   81 
   82 #define NAT64_LOG       0x0001          /* Enable logging via BPF */
   83 
   84 typedef struct _ipfw_nat64stl_cfg {
   85         char            name[64];       /* NAT name                     */
   86         ipfw_obj_ntlv   ntlv6;          /* object name tlv              */
   87         ipfw_obj_ntlv   ntlv4;          /* object name tlv              */
   88         struct in6_addr prefix6;        /* NAT64 prefix */
   89         uint8_t         plen6;          /* Prefix length */
   90         uint8_t         set;            /* Named instance set [0..31] */
   91         uint8_t         spare[2];
   92         uint32_t        flags;
   93 } ipfw_nat64stl_cfg;
   94 
   95 /*
   96  * NAT64LSN default configuration values
   97  */
   98 #define NAT64LSN_MAX_PORTS      2048    /* Max number of ports per host */
   99 #define NAT64LSN_JMAXLEN        2048    /* Max outstanding requests. */
  100 #define NAT64LSN_TCP_SYN_AGE    10      /* State's TTL after SYN received. */
  101 #define NAT64LSN_TCP_EST_AGE    (2 * 3600) /* TTL for established connection */
  102 #define NAT64LSN_TCP_FIN_AGE    180     /* State's TTL after FIN/RST received */
  103 #define NAT64LSN_UDP_AGE        120     /* TTL for UDP states */
  104 #define NAT64LSN_ICMP_AGE       60      /* TTL for ICMP states */
  105 #define NAT64LSN_HOST_AGE       3600    /* TTL for stale host entry */
  106 #define NAT64LSN_PG_AGE         900     /* TTL for stale ports groups */
  107 
  108 typedef struct _ipfw_nat64lsn_cfg {
  109         char            name[64];       /* NAT name                     */
  110         uint32_t        flags;
  111         uint32_t        max_ports;      /* Max ports per client */
  112         uint32_t        agg_prefix_len; /* Prefix length to count */
  113         uint32_t        agg_prefix_max; /* Max hosts per agg prefix */
  114         struct in_addr  prefix4;
  115         uint16_t        plen4;          /* Prefix length */
  116         uint16_t        plen6;          /* Prefix length */
  117         struct in6_addr prefix6;        /* NAT64 prefix */
  118         uint32_t        jmaxlen;        /* Max jobqueue length */
  119         uint16_t        min_port;       /* Min port group # to use */
  120         uint16_t        max_port;       /* Max port group # to use */
  121         uint16_t        nh_delete_delay;/* Stale host delete delay */
  122         uint16_t        pg_delete_delay;/* Stale portgroup delete delay */
  123         uint16_t        st_syn_ttl;     /* TCP syn expire */
  124         uint16_t        st_close_ttl;   /* TCP fin expire */
  125         uint16_t        st_estab_ttl;   /* TCP established expire */
  126         uint16_t        st_udp_ttl;     /* UDP expire */
  127         uint16_t        st_icmp_ttl;    /* ICMP expire */
  128         uint8_t         set;            /* Named instance set [0..31] */
  129         uint8_t         spare;
  130 } ipfw_nat64lsn_cfg;
  131 
  132 typedef struct _ipfw_nat64lsn_state {
  133         struct in_addr  daddr;          /* Remote IPv4 address */
  134         uint16_t        dport;          /* Remote destination port */
  135         uint16_t        aport;          /* Local alias port */
  136         uint16_t        sport;          /* Source port */
  137         uint8_t         flags;          /* State flags */
  138         uint8_t         spare[3];
  139         uint16_t        idle;           /* Last used time */
  140 } ipfw_nat64lsn_state;
  141 
  142 typedef struct _ipfw_nat64lsn_stg {
  143         uint64_t        next_idx;       /* next state index */
  144         struct in_addr  alias4;         /* IPv4 alias address */
  145         uint8_t         proto;          /* protocol */
  146         uint8_t         flags;
  147         uint16_t        spare;
  148         struct in6_addr host6;          /* Bound IPv6 host */
  149         uint32_t        count;          /* Number of states */
  150         uint32_t        spare2;
  151 } ipfw_nat64lsn_stg;
  152 
  153 #endif /* _NETINET6_IP_FW_NAT64_H_ */
  154 

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