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sys/netinet/in.h

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    1 /*-
    2  * Copyright (c) 1982, 1986, 1990, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)in.h        8.3 (Berkeley) 1/3/94
   30  * $FreeBSD: src/sys/netinet/in.h,v 1.90.2.4 2005/12/27 00:52:24 gnn Exp $
   31  */
   32 
   33 #ifndef _NETINET_IN_H_
   34 #define _NETINET_IN_H_
   35 
   36 #include <sys/cdefs.h>
   37 #include <sys/_types.h>
   38 #include <machine/endian.h>
   39 
   40 /* Protocols common to RFC 1700, POSIX, and X/Open. */
   41 #define IPPROTO_IP              0               /* dummy for IP */
   42 #define IPPROTO_ICMP            1               /* control message protocol */
   43 #define IPPROTO_TCP             6               /* tcp */
   44 #define IPPROTO_UDP             17              /* user datagram protocol */
   45 
   46 #define INADDR_ANY              (u_int32_t)0x00000000
   47 #define INADDR_BROADCAST        (u_int32_t)0xffffffff   /* must be masked */
   48 
   49 #ifndef _UINT8_T_DECLARED
   50 typedef __uint8_t               uint8_t;
   51 #define _UINT8_T_DECLARED
   52 #endif
   53 
   54 #ifndef _UINT16_T_DECLARED
   55 typedef __uint16_t              uint16_t;
   56 #define _UINT16_T_DECLARED
   57 #endif
   58 
   59 #ifndef _UINT32_T_DECLARED
   60 typedef __uint32_t              uint32_t;
   61 #define _UINT32_T_DECLARED
   62 #endif
   63 
   64 #ifndef _IN_ADDR_T_DECLARED
   65 typedef uint32_t                in_addr_t;
   66 #define _IN_ADDR_T_DECLARED
   67 #endif
   68 
   69 #ifndef _IN_PORT_T_DECLARED
   70 typedef uint16_t                in_port_t;
   71 #define _IN_PORT_T_DECLARED
   72 #endif
   73 
   74 #ifndef _SA_FAMILY_T_DECLARED
   75 typedef __sa_family_t           sa_family_t;
   76 #define _SA_FAMILY_T_DECLARED
   77 #endif
   78 
   79 /* Internet address (a structure for historical reasons). */
   80 #ifndef _STRUCT_IN_ADDR_DECLARED
   81 struct in_addr {
   82         in_addr_t s_addr;
   83 };
   84 #define _STRUCT_IN_ADDR_DECLARED
   85 #endif
   86 
   87 /* Socket address, internet style. */
   88 struct sockaddr_in {
   89         uint8_t sin_len;
   90         sa_family_t     sin_family;
   91         in_port_t       sin_port;
   92         struct  in_addr sin_addr;
   93         char    sin_zero[8];
   94 };
   95 
   96 #ifndef _KERNEL
   97 
   98 #ifndef _BYTEORDER_PROTOTYPED
   99 #define _BYTEORDER_PROTOTYPED
  100 __BEGIN_DECLS
  101 uint32_t        htonl(uint32_t);
  102 uint16_t        htons(uint16_t);
  103 uint32_t        ntohl(uint32_t);
  104 uint16_t        ntohs(uint16_t);
  105 __END_DECLS
  106 #endif
  107 
  108 #ifndef _BYTEORDER_FUNC_DEFINED
  109 #define _BYTEORDER_FUNC_DEFINED
  110 #define htonl(x)        __htonl(x)
  111 #define htons(x)        __htons(x)
  112 #define ntohl(x)        __ntohl(x)
  113 #define ntohs(x)        __ntohs(x)
  114 #endif
  115 
  116 #endif /* !_KERNEL */
  117 
  118 #if __POSIX_VISIBLE >= 200112
  119 #define IPPROTO_RAW             255             /* raw IP packet */
  120 #define INET_ADDRSTRLEN         16
  121 #endif
  122 
  123 #if __BSD_VISIBLE
  124 /*
  125  * Constants and structures defined by the internet system,
  126  * Per RFC 790, September 1981, and numerous additions.
  127  */
  128 
  129 /*
  130  * Protocols (RFC 1700)
  131  */
  132 #define IPPROTO_HOPOPTS         0               /* IP6 hop-by-hop options */
  133 #define IPPROTO_IGMP            2               /* group mgmt protocol */
  134 #define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
  135 #define IPPROTO_IPV4            4               /* IPv4 encapsulation */
  136 #define IPPROTO_IPIP            IPPROTO_IPV4    /* for compatibility */
  137 #define IPPROTO_ST              7               /* Stream protocol II */
  138 #define IPPROTO_EGP             8               /* exterior gateway protocol */
  139 #define IPPROTO_PIGP            9               /* private interior gateway */
  140 #define IPPROTO_RCCMON          10              /* BBN RCC Monitoring */
  141 #define IPPROTO_NVPII           11              /* network voice protocol*/
  142 #define IPPROTO_PUP             12              /* pup */
  143 #define IPPROTO_ARGUS           13              /* Argus */
  144 #define IPPROTO_EMCON           14              /* EMCON */
  145 #define IPPROTO_XNET            15              /* Cross Net Debugger */
  146 #define IPPROTO_CHAOS           16              /* Chaos*/
  147 #define IPPROTO_MUX             18              /* Multiplexing */
  148 #define IPPROTO_MEAS            19              /* DCN Measurement Subsystems */
  149 #define IPPROTO_HMP             20              /* Host Monitoring */
  150 #define IPPROTO_PRM             21              /* Packet Radio Measurement */
  151 #define IPPROTO_IDP             22              /* xns idp */
  152 #define IPPROTO_TRUNK1          23              /* Trunk-1 */
  153 #define IPPROTO_TRUNK2          24              /* Trunk-2 */
  154 #define IPPROTO_LEAF1           25              /* Leaf-1 */
  155 #define IPPROTO_LEAF2           26              /* Leaf-2 */
  156 #define IPPROTO_RDP             27              /* Reliable Data */
  157 #define IPPROTO_IRTP            28              /* Reliable Transaction */
  158 #define IPPROTO_TP              29              /* tp-4 w/ class negotiation */
  159 #define IPPROTO_BLT             30              /* Bulk Data Transfer */
  160 #define IPPROTO_NSP             31              /* Network Services */
  161 #define IPPROTO_INP             32              /* Merit Internodal */
  162 #define IPPROTO_SEP             33              /* Sequential Exchange */
  163 #define IPPROTO_3PC             34              /* Third Party Connect */
  164 #define IPPROTO_IDPR            35              /* InterDomain Policy Routing */
  165 #define IPPROTO_XTP             36              /* XTP */
  166 #define IPPROTO_DDP             37              /* Datagram Delivery */
  167 #define IPPROTO_CMTP            38              /* Control Message Transport */
  168 #define IPPROTO_TPXX            39              /* TP++ Transport */
  169 #define IPPROTO_IL              40              /* IL transport protocol */
  170 #define IPPROTO_IPV6            41              /* IP6 header */
  171 #define IPPROTO_SDRP            42              /* Source Demand Routing */
  172 #define IPPROTO_ROUTING         43              /* IP6 routing header */
  173 #define IPPROTO_FRAGMENT        44              /* IP6 fragmentation header */
  174 #define IPPROTO_IDRP            45              /* InterDomain Routing*/
  175 #define IPPROTO_RSVP            46              /* resource reservation */
  176 #define IPPROTO_GRE             47              /* General Routing Encap. */
  177 #define IPPROTO_MHRP            48              /* Mobile Host Routing */
  178 #define IPPROTO_BHA             49              /* BHA */
  179 #define IPPROTO_ESP             50              /* IP6 Encap Sec. Payload */
  180 #define IPPROTO_AH              51              /* IP6 Auth Header */
  181 #define IPPROTO_INLSP           52              /* Integ. Net Layer Security */
  182 #define IPPROTO_SWIPE           53              /* IP with encryption */
  183 #define IPPROTO_NHRP            54              /* Next Hop Resolution */
  184 #define IPPROTO_MOBILE          55              /* IP Mobility */
  185 #define IPPROTO_TLSP            56              /* Transport Layer Security */
  186 #define IPPROTO_SKIP            57              /* SKIP */
  187 #define IPPROTO_ICMPV6          58              /* ICMP6 */
  188 #define IPPROTO_NONE            59              /* IP6 no next header */
  189 #define IPPROTO_DSTOPTS         60              /* IP6 destination option */
  190 #define IPPROTO_AHIP            61              /* any host internal protocol */
  191 #define IPPROTO_CFTP            62              /* CFTP */
  192 #define IPPROTO_HELLO           63              /* "hello" routing protocol */
  193 #define IPPROTO_SATEXPAK        64              /* SATNET/Backroom EXPAK */
  194 #define IPPROTO_KRYPTOLAN       65              /* Kryptolan */
  195 #define IPPROTO_RVD             66              /* Remote Virtual Disk */
  196 #define IPPROTO_IPPC            67              /* Pluribus Packet Core */
  197 #define IPPROTO_ADFS            68              /* Any distributed FS */
  198 #define IPPROTO_SATMON          69              /* Satnet Monitoring */
  199 #define IPPROTO_VISA            70              /* VISA Protocol */
  200 #define IPPROTO_IPCV            71              /* Packet Core Utility */
  201 #define IPPROTO_CPNX            72              /* Comp. Prot. Net. Executive */
  202 #define IPPROTO_CPHB            73              /* Comp. Prot. HeartBeat */
  203 #define IPPROTO_WSN             74              /* Wang Span Network */
  204 #define IPPROTO_PVP             75              /* Packet Video Protocol */
  205 #define IPPROTO_BRSATMON        76              /* BackRoom SATNET Monitoring */
  206 #define IPPROTO_ND              77              /* Sun net disk proto (temp.) */
  207 #define IPPROTO_WBMON           78              /* WIDEBAND Monitoring */
  208 #define IPPROTO_WBEXPAK         79              /* WIDEBAND EXPAK */
  209 #define IPPROTO_EON             80              /* ISO cnlp */
  210 #define IPPROTO_VMTP            81              /* VMTP */
  211 #define IPPROTO_SVMTP           82              /* Secure VMTP */
  212 #define IPPROTO_VINES           83              /* Banyon VINES */
  213 #define IPPROTO_TTP             84              /* TTP */
  214 #define IPPROTO_IGP             85              /* NSFNET-IGP */
  215 #define IPPROTO_DGP             86              /* dissimilar gateway prot. */
  216 #define IPPROTO_TCF             87              /* TCF */
  217 #define IPPROTO_IGRP            88              /* Cisco/GXS IGRP */
  218 #define IPPROTO_OSPFIGP         89              /* OSPFIGP */
  219 #define IPPROTO_SRPC            90              /* Strite RPC protocol */
  220 #define IPPROTO_LARP            91              /* Locus Address Resoloution */
  221 #define IPPROTO_MTP             92              /* Multicast Transport */
  222 #define IPPROTO_AX25            93              /* AX.25 Frames */
  223 #define IPPROTO_IPEIP           94              /* IP encapsulated in IP */
  224 #define IPPROTO_MICP            95              /* Mobile Int.ing control */
  225 #define IPPROTO_SCCSP           96              /* Semaphore Comm. security */
  226 #define IPPROTO_ETHERIP         97              /* Ethernet IP encapsulation */
  227 #define IPPROTO_ENCAP           98              /* encapsulation header */
  228 #define IPPROTO_APES            99              /* any private encr. scheme */
  229 #define IPPROTO_GMTP            100             /* GMTP*/
  230 #define IPPROTO_IPCOMP          108             /* payload compression (IPComp) */
  231 #define IPPROTO_SCTP            132             /* SCTP */
  232 /* 101-254: Partly Unassigned */
  233 #define IPPROTO_PIM             103             /* Protocol Independent Mcast */
  234 #define IPPROTO_CARP            112             /* CARP */
  235 #define IPPROTO_PGM             113             /* PGM */
  236 #define IPPROTO_PFSYNC          240             /* PFSYNC */
  237 /* 255: Reserved */
  238 /* BSD Private, local use, namespace incursion, no longer used */
  239 #define IPPROTO_OLD_DIVERT      254             /* OLD divert pseudo-proto */
  240 #define IPPROTO_MAX             256
  241 
  242 /* last return value of *_input(), meaning "all job for this pkt is done".  */
  243 #define IPPROTO_DONE            257
  244 
  245 /* Only used internally, so can be outside the range of valid IP protocols. */
  246 #define IPPROTO_DIVERT          258             /* divert pseudo-protocol */
  247 
  248 /*
  249  * Defined to avoid confusion.  The master value is defined by
  250  * PROTO_SPACER in sys/protosw.h.
  251  */
  252 #define IPPROTO_SPACER          32767           /* spacer for loadable protos */
  253 
  254 /*
  255  * Local port number conventions:
  256  *
  257  * When a user does a bind(2) or connect(2) with a port number of zero,
  258  * a non-conflicting local port address is chosen.
  259  * The default range is IPPORT_HIFIRSTAUTO through
  260  * IPPORT_HILASTAUTO, although that is settable by sysctl.
  261  *
  262  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  263  * default assignment range.
  264  *
  265  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
  266  *
  267  * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
  268  * into the "high" range.  These are reserved for client outbound connections
  269  * which do not want to be filtered by any firewalls.  Note that by default
  270  * this is the same as IP_PORTRANGE_DEFAULT.
  271  *
  272  * The value IP_PORTRANGE_LOW changes the range to the "low" are
  273  * that is (by convention) restricted to privileged processes.  This
  274  * convention is based on "vouchsafe" principles only.  It is only secure
  275  * if you trust the remote host to restrict these ports.
  276  *
  277  * The default range of ports and the high range can be changed by
  278  * sysctl(3).  (net.inet.ip.port{hi,low}{first,last}_auto)
  279  *
  280  * Changing those values has bad security implications if you are
  281  * using a stateless firewall that is allowing packets outside of that
  282  * range in order to allow transparent outgoing connections.
  283  *
  284  * Such a firewall configuration will generally depend on the use of these
  285  * default values.  If you change them, you may find your Security
  286  * Administrator looking for you with a heavy object.
  287  *
  288  * For a slightly more orthodox text view on this:
  289  *
  290  *            ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers
  291  *
  292  *    port numbers are divided into three ranges:
  293  *
  294  *                0 -  1023 Well Known Ports
  295  *             1024 - 49151 Registered Ports
  296  *            49152 - 65535 Dynamic and/or Private Ports
  297  *
  298  */
  299 
  300 /*
  301  * Ports < IPPORT_RESERVED are reserved for
  302  * privileged processes (e.g. root).         (IP_PORTRANGE_LOW)
  303  */
  304 #define IPPORT_RESERVED         1024
  305 
  306 /*
  307  * Default local port range, used by both IP_PORTRANGE_DEFAULT
  308  * and IP_PORTRANGE_HIGH.
  309  */
  310 #define IPPORT_HIFIRSTAUTO      49152
  311 #define IPPORT_HILASTAUTO       65535
  312 
  313 /*
  314  * Scanning for a free reserved port return a value below IPPORT_RESERVED,
  315  * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was
  316  * 512, but that conflicts with some well-known-services that firewalls may
  317  * have a fit if we use.
  318  */
  319 #define IPPORT_RESERVEDSTART    600
  320 
  321 #define IPPORT_MAX              65535
  322 
  323 /*
  324  * Definitions of bits in internet address integers.
  325  * On subnets, the decomposition of addresses to host and net parts
  326  * is done according to subnet mask, not the masks here.
  327  */
  328 #define IN_CLASSA(i)            (((u_int32_t)(i) & 0x80000000) == 0)
  329 #define IN_CLASSA_NET           0xff000000
  330 #define IN_CLASSA_NSHIFT        24
  331 #define IN_CLASSA_HOST          0x00ffffff
  332 #define IN_CLASSA_MAX           128
  333 
  334 #define IN_CLASSB(i)            (((u_int32_t)(i) & 0xc0000000) == 0x80000000)
  335 #define IN_CLASSB_NET           0xffff0000
  336 #define IN_CLASSB_NSHIFT        16
  337 #define IN_CLASSB_HOST          0x0000ffff
  338 #define IN_CLASSB_MAX           65536
  339 
  340 #define IN_CLASSC(i)            (((u_int32_t)(i) & 0xe0000000) == 0xc0000000)
  341 #define IN_CLASSC_NET           0xffffff00
  342 #define IN_CLASSC_NSHIFT        8
  343 #define IN_CLASSC_HOST          0x000000ff
  344 
  345 #define IN_CLASSD(i)            (((u_int32_t)(i) & 0xf0000000) == 0xe0000000)
  346 #define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */
  347 #define IN_CLASSD_NSHIFT        28              /* net and host fields, but */
  348 #define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */
  349 #define IN_MULTICAST(i)         IN_CLASSD(i)
  350 
  351 #define IN_EXPERIMENTAL(i)      (((u_int32_t)(i) & 0xf0000000) == 0xf0000000)
  352 #define IN_BADCLASS(i)          (((u_int32_t)(i) & 0xf0000000) == 0xf0000000)
  353 
  354 #define INADDR_LOOPBACK         (u_int32_t)0x7f000001
  355 #ifndef _KERNEL
  356 #define INADDR_NONE             0xffffffff              /* -1 return */
  357 #endif
  358 
  359 #define INADDR_UNSPEC_GROUP     (u_int32_t)0xe0000000   /* 224.0.0.0 */
  360 #define INADDR_ALLHOSTS_GROUP   (u_int32_t)0xe0000001   /* 224.0.0.1 */
  361 #define INADDR_ALLRTRS_GROUP    (u_int32_t)0xe0000002   /* 224.0.0.2 */
  362 #define INADDR_CARP_GROUP       (u_int32_t)0xe0000012   /* 224.0.0.18 */
  363 #define INADDR_PFSYNC_GROUP     (u_int32_t)0xe00000f0   /* 224.0.0.240 */
  364 #define INADDR_ALLMDNS_GROUP    (u_int32_t)0xe00000fb   /* 224.0.0.251 */
  365 #define INADDR_MAX_LOCAL_GROUP  (u_int32_t)0xe00000ff   /* 224.0.0.255 */
  366 
  367 #define IN_LOOPBACKNET          127                     /* official! */
  368 
  369 /*
  370  * Options for use with [gs]etsockopt at the IP level.
  371  * First word of comment is data type; bool is stored in int.
  372  */
  373 #define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
  374 #define IP_HDRINCL              2    /* int; header is included with data */
  375 #define IP_TOS                  3    /* int; IP type of service and preced. */
  376 #define IP_TTL                  4    /* int; IP time to live */
  377 #define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
  378 #define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
  379 #define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
  380 #define IP_SENDSRCADDR          IP_RECVDSTADDR /* cmsg_type to set src addr */
  381 #define IP_RETOPTS              8    /* ip_opts; set/get IP options */
  382 #define IP_MULTICAST_IF         9    /* u_char; set/get IP multicast i/f  */
  383 #define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
  384 #define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
  385 #define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
  386 #define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
  387 #define IP_MULTICAST_VIF        14   /* set/get IP mcast virt. iface */
  388 #define IP_RSVP_ON              15   /* enable RSVP in kernel */
  389 #define IP_RSVP_OFF             16   /* disable RSVP in kernel */
  390 #define IP_RSVP_VIF_ON          17   /* set RSVP per-vif socket */
  391 #define IP_RSVP_VIF_OFF         18   /* unset RSVP per-vif socket */
  392 #define IP_PORTRANGE            19   /* int; range to choose for unspec port */
  393 #define IP_RECVIF               20   /* bool; receive reception if w/dgram */
  394 /* for IPSEC */
  395 #define IP_IPSEC_POLICY         21   /* int; set/get security policy */
  396 #define IP_FAITH                22   /* bool; accept FAITH'ed connections */
  397 
  398 #define IP_ONESBCAST            23   /* bool: send all-ones broadcast */
  399 
  400 #define IP_FW_TABLE_ADD         40   /* add entry */
  401 #define IP_FW_TABLE_DEL         41   /* delete entry */
  402 #define IP_FW_TABLE_FLUSH       42   /* flush table */
  403 #define IP_FW_TABLE_GETSIZE     43   /* get table size */
  404 #define IP_FW_TABLE_LIST        44   /* list table contents */
  405 
  406 #define IP_FW_ADD               50   /* add a firewall rule to chain */
  407 #define IP_FW_DEL               51   /* delete a firewall rule from chain */
  408 #define IP_FW_FLUSH             52   /* flush firewall rule chain */
  409 #define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */
  410 #define IP_FW_GET               54   /* get entire firewall rule chain */
  411 #define IP_FW_RESETLOG          55   /* reset logging counters */
  412 
  413 #define IP_DUMMYNET_CONFIGURE   60   /* add/configure a dummynet pipe */
  414 #define IP_DUMMYNET_DEL         61   /* delete a dummynet pipe from chain */
  415 #define IP_DUMMYNET_FLUSH       62   /* flush dummynet */
  416 #define IP_DUMMYNET_GET         64   /* get entire dummynet pipes */
  417 
  418 #define IP_RECVTTL              65   /* bool; receive IP TTL w/dgram */
  419 #define IP_MINTTL               66   /* minimum TTL for packet or drop */
  420 #define IP_DONTFRAG             67   /* don't fragment packet */
  421 
  422 /*
  423  * Defaults and limits for options
  424  */
  425 #define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
  426 #define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
  427 #define IP_MAX_MEMBERSHIPS      20      /* per socket */
  428 
  429 /*
  430  * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
  431  */
  432 struct ip_mreq {
  433         struct  in_addr imr_multiaddr;  /* IP multicast address of group */
  434         struct  in_addr imr_interface;  /* local IP address of interface */
  435 };
  436 
  437 /*
  438  * Argument for IP_PORTRANGE:
  439  * - which range to search when port is unspecified at bind() or connect()
  440  */
  441 #define IP_PORTRANGE_DEFAULT    0       /* default range */
  442 #define IP_PORTRANGE_HIGH       1       /* "high" - request firewall bypass */
  443 #define IP_PORTRANGE_LOW        2       /* "low" - vouchsafe security */
  444 
  445 /*
  446  * Definitions for inet sysctl operations.
  447  *
  448  * Third level is protocol number.
  449  * Fourth level is desired variable within that protocol.
  450  */
  451 #define IPPROTO_MAXID   (IPPROTO_AH + 1)        /* don't list to IPPROTO_MAX */
  452 
  453 #define CTL_IPPROTO_NAMES { \
  454         { "ip", CTLTYPE_NODE }, \
  455         { "icmp", CTLTYPE_NODE }, \
  456         { "igmp", CTLTYPE_NODE }, \
  457         { "ggp", CTLTYPE_NODE }, \
  458         { 0, 0 }, \
  459         { 0, 0 }, \
  460         { "tcp", CTLTYPE_NODE }, \
  461         { 0, 0 }, \
  462         { "egp", CTLTYPE_NODE }, \
  463         { 0, 0 }, \
  464         { 0, 0 }, \
  465         { 0, 0 }, \
  466         { "pup", CTLTYPE_NODE }, \
  467         { 0, 0 }, \
  468         { 0, 0 }, \
  469         { 0, 0 }, \
  470         { 0, 0 }, \
  471         { "udp", CTLTYPE_NODE }, \
  472         { 0, 0 }, \
  473         { 0, 0 }, \
  474         { 0, 0 }, \
  475         { 0, 0 }, \
  476         { "idp", CTLTYPE_NODE }, \
  477         { 0, 0 }, \
  478         { 0, 0 }, \
  479         { 0, 0 }, \
  480         { 0, 0 }, \
  481         { 0, 0 }, \
  482         { 0, 0 }, \
  483         { 0, 0 }, \
  484         { 0, 0 }, \
  485         { 0, 0 }, \
  486         { 0, 0 }, \
  487         { 0, 0 }, \
  488         { 0, 0 }, \
  489         { 0, 0 }, \
  490         { 0, 0 }, \
  491         { 0, 0 }, \
  492         { 0, 0 }, \
  493         { 0, 0 }, \
  494         { 0, 0 }, \
  495         { 0, 0 }, \
  496         { 0, 0 }, \
  497         { 0, 0 }, \
  498         { 0, 0 }, \
  499         { 0, 0 }, \
  500         { 0, 0 }, \
  501         { 0, 0 }, \
  502         { 0, 0 }, \
  503         { 0, 0 }, \
  504         { 0, 0 }, \
  505         { "ipsec", CTLTYPE_NODE }, \
  506         { 0, 0 }, \
  507         { 0, 0 }, \
  508         { 0, 0 }, \
  509         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  510         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  511         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  512         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  513         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  514         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  515         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  516         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  517         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \
  518         { 0, 0 }, \
  519         { 0, 0 }, \
  520         { 0, 0 }, \
  521         { "pim", CTLTYPE_NODE }, \
  522 }
  523 
  524 /*
  525  * Names for IP sysctl objects
  526  */
  527 #define IPCTL_FORWARDING        1       /* act as router */
  528 #define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
  529 #define IPCTL_DEFTTL            3       /* default TTL */
  530 #ifdef notyet
  531 #define IPCTL_DEFMTU            4       /* default MTU */
  532 #endif
  533 #define IPCTL_RTEXPIRE          5       /* cloned route expiration time */
  534 #define IPCTL_RTMINEXPIRE       6       /* min value for expiration time */
  535 #define IPCTL_RTMAXCACHE        7       /* trigger level for dynamic expire */
  536 #define IPCTL_SOURCEROUTE       8       /* may perform source routes */
  537 #define IPCTL_DIRECTEDBROADCAST 9       /* may re-broadcast received packets */
  538 #define IPCTL_INTRQMAXLEN       10      /* max length of netisr queue */
  539 #define IPCTL_INTRQDROPS        11      /* number of netisr q drops */
  540 #define IPCTL_STATS             12      /* ipstat structure */
  541 #define IPCTL_ACCEPTSOURCEROUTE 13      /* may accept source routed packets */
  542 #define IPCTL_FASTFORWARDING    14      /* use fast IP forwarding code */
  543 #define IPCTL_KEEPFAITH         15      /* FAITH IPv4->IPv6 translater ctl */
  544 #define IPCTL_GIF_TTL           16      /* default TTL for gif encap packet */
  545 #define IPCTL_MAXID             17
  546 
  547 #define IPCTL_NAMES { \
  548         { 0, 0 }, \
  549         { "forwarding", CTLTYPE_INT }, \
  550         { "redirect", CTLTYPE_INT }, \
  551         { "ttl", CTLTYPE_INT }, \
  552         { "mtu", CTLTYPE_INT }, \
  553         { "rtexpire", CTLTYPE_INT }, \
  554         { "rtminexpire", CTLTYPE_INT }, \
  555         { "rtmaxcache", CTLTYPE_INT }, \
  556         { "sourceroute", CTLTYPE_INT }, \
  557         { "directed-broadcast", CTLTYPE_INT }, \
  558         { "intr-queue-maxlen", CTLTYPE_INT }, \
  559         { "intr-queue-drops", CTLTYPE_INT }, \
  560         { "stats", CTLTYPE_STRUCT }, \
  561         { "accept_sourceroute", CTLTYPE_INT }, \
  562         { "fastforwarding", CTLTYPE_INT }, \
  563 }
  564 
  565 #endif /* __BSD_VISIBLE */
  566 
  567 #ifdef _KERNEL
  568 
  569 struct ifnet; struct mbuf;      /* forward declarations for Standard C */
  570 
  571 int      in_broadcast(struct in_addr, struct ifnet *);
  572 int      in_canforward(struct in_addr);
  573 int      in_localaddr(struct in_addr);
  574 int      in_localip(struct in_addr);
  575 char    *inet_ntoa(struct in_addr); /* in libkern */
  576 char    *inet_ntoa_r(struct in_addr ina, char *buf); /* in libkern */
  577 void     in_ifdetach(struct ifnet *);
  578 
  579 #define in_hosteq(s, t) ((s).s_addr == (t).s_addr)
  580 #define in_nullhost(x)  ((x).s_addr == INADDR_ANY)
  581 
  582 #define satosin(sa)     ((struct sockaddr_in *)(sa))
  583 #define sintosa(sin)    ((struct sockaddr *)(sin))
  584 #define ifatoia(ifa)    ((struct in_ifaddr *)(ifa))
  585 
  586 #endif /* _KERNEL */
  587 
  588 /* INET6 stuff */
  589 #if __POSIX_VISIBLE >= 200112
  590 #define __KAME_NETINET_IN_H_INCLUDED_
  591 #include <netinet6/in6.h>
  592 #undef __KAME_NETINET_IN_H_INCLUDED_
  593 #endif
  594 
  595 #endif /* !_NETINET_IN_H_*/

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