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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1986, 1990, 1993
    5  *      The Regents of the University of California.  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  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)in.h        8.3 (Berkeley) 1/3/94
   32  * $FreeBSD$
   33  */
   34 
   35 #ifndef _NETINET_IN_H_
   36 #define _NETINET_IN_H_
   37 
   38 #include <sys/cdefs.h>
   39 #include <sys/_types.h>
   40 #include <machine/endian.h>
   41 
   42 /* Protocols common to RFC 1700, POSIX, and X/Open. */
   43 #define IPPROTO_IP              0               /* dummy for IP */
   44 #define IPPROTO_ICMP            1               /* control message protocol */
   45 #define IPPROTO_TCP             6               /* tcp */
   46 #define IPPROTO_UDP             17              /* user datagram protocol */
   47 
   48 #define INADDR_ANY              ((in_addr_t)0x00000000)
   49 #define INADDR_BROADCAST        ((in_addr_t)0xffffffff) /* must be masked */
   50 
   51 #ifndef _UINT8_T_DECLARED
   52 typedef __uint8_t               uint8_t;
   53 #define _UINT8_T_DECLARED
   54 #endif
   55 
   56 #ifndef _UINT16_T_DECLARED
   57 typedef __uint16_t              uint16_t;
   58 #define _UINT16_T_DECLARED
   59 #endif
   60 
   61 #ifndef _UINT32_T_DECLARED
   62 typedef __uint32_t              uint32_t;
   63 #define _UINT32_T_DECLARED
   64 #endif
   65 
   66 #ifndef _IN_ADDR_T_DECLARED
   67 typedef uint32_t                in_addr_t;
   68 #define _IN_ADDR_T_DECLARED
   69 #endif
   70 
   71 #ifndef _IN_PORT_T_DECLARED
   72 typedef uint16_t                in_port_t;
   73 #define _IN_PORT_T_DECLARED
   74 #endif
   75 
   76 #ifndef _SA_FAMILY_T_DECLARED
   77 typedef __sa_family_t           sa_family_t;
   78 #define _SA_FAMILY_T_DECLARED
   79 #endif
   80 
   81 /* Internet address (a structure for historical reasons). */
   82 #ifndef _STRUCT_IN_ADDR_DECLARED
   83 struct in_addr {
   84         in_addr_t s_addr;
   85 };
   86 #define _STRUCT_IN_ADDR_DECLARED
   87 #endif
   88 
   89 #ifndef _SOCKLEN_T_DECLARED
   90 typedef __socklen_t     socklen_t;
   91 #define _SOCKLEN_T_DECLARED
   92 #endif
   93 
   94 #include <sys/_sockaddr_storage.h>
   95 
   96 /* Socket address, internet style. */
   97 struct sockaddr_in {
   98         uint8_t sin_len;
   99         sa_family_t     sin_family;
  100         in_port_t       sin_port;
  101         struct  in_addr sin_addr;
  102         char    sin_zero[8];
  103 };
  104 
  105 #if !defined(_KERNEL) && __POSIX_VISIBLE >= 200112
  106 
  107 #ifndef _BYTEORDER_PROTOTYPED
  108 #define _BYTEORDER_PROTOTYPED
  109 __BEGIN_DECLS
  110 uint32_t        htonl(uint32_t);
  111 uint16_t        htons(uint16_t);
  112 uint32_t        ntohl(uint32_t);
  113 uint16_t        ntohs(uint16_t);
  114 __END_DECLS
  115 #endif
  116 
  117 #ifndef _BYTEORDER_FUNC_DEFINED
  118 #define _BYTEORDER_FUNC_DEFINED
  119 #define htonl(x)        __htonl(x)
  120 #define htons(x)        __htons(x)
  121 #define ntohl(x)        __ntohl(x)
  122 #define ntohs(x)        __ntohs(x)
  123 #endif
  124 
  125 #endif /* !_KERNEL && __POSIX_VISIBLE >= 200112 */
  126 
  127 #if __POSIX_VISIBLE >= 200112
  128 #define IPPROTO_IPV6            41              /* IP6 header */
  129 #define IPPROTO_RAW             255             /* raw IP packet */
  130 #define INET_ADDRSTRLEN         16
  131 #endif
  132 
  133 #if __BSD_VISIBLE
  134 /*
  135  * Constants and structures defined by the internet system,
  136  * Per RFC 790, September 1981, and numerous additions.
  137  */
  138 
  139 /*
  140  * Protocols (RFC 1700)
  141  */
  142 #define IPPROTO_HOPOPTS         0               /* IP6 hop-by-hop options */
  143 #define IPPROTO_IGMP            2               /* group mgmt protocol */
  144 #define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
  145 #define IPPROTO_IPV4            4               /* IPv4 encapsulation */
  146 #define IPPROTO_IPIP            IPPROTO_IPV4    /* for compatibility */
  147 #define IPPROTO_ST              7               /* Stream protocol II */
  148 #define IPPROTO_EGP             8               /* exterior gateway protocol */
  149 #define IPPROTO_PIGP            9               /* private interior gateway */
  150 #define IPPROTO_RCCMON          10              /* BBN RCC Monitoring */
  151 #define IPPROTO_NVPII           11              /* network voice protocol*/
  152 #define IPPROTO_PUP             12              /* pup */
  153 #define IPPROTO_ARGUS           13              /* Argus */
  154 #define IPPROTO_EMCON           14              /* EMCON */
  155 #define IPPROTO_XNET            15              /* Cross Net Debugger */
  156 #define IPPROTO_CHAOS           16              /* Chaos*/
  157 #define IPPROTO_MUX             18              /* Multiplexing */
  158 #define IPPROTO_MEAS            19              /* DCN Measurement Subsystems */
  159 #define IPPROTO_HMP             20              /* Host Monitoring */
  160 #define IPPROTO_PRM             21              /* Packet Radio Measurement */
  161 #define IPPROTO_IDP             22              /* xns idp */
  162 #define IPPROTO_TRUNK1          23              /* Trunk-1 */
  163 #define IPPROTO_TRUNK2          24              /* Trunk-2 */
  164 #define IPPROTO_LEAF1           25              /* Leaf-1 */
  165 #define IPPROTO_LEAF2           26              /* Leaf-2 */
  166 #define IPPROTO_RDP             27              /* Reliable Data */
  167 #define IPPROTO_IRTP            28              /* Reliable Transaction */
  168 #define IPPROTO_TP              29              /* tp-4 w/ class negotiation */
  169 #define IPPROTO_BLT             30              /* Bulk Data Transfer */
  170 #define IPPROTO_NSP             31              /* Network Services */
  171 #define IPPROTO_INP             32              /* Merit Internodal */
  172 #define IPPROTO_DCCP            33              /* Datagram Congestion Control Protocol */
  173 #define IPPROTO_3PC             34              /* Third Party Connect */
  174 #define IPPROTO_IDPR            35              /* InterDomain Policy Routing */
  175 #define IPPROTO_XTP             36              /* XTP */
  176 #define IPPROTO_DDP             37              /* Datagram Delivery */
  177 #define IPPROTO_CMTP            38              /* Control Message Transport */
  178 #define IPPROTO_TPXX            39              /* TP++ Transport */
  179 #define IPPROTO_IL              40              /* IL transport protocol */
  180 #define IPPROTO_SDRP            42              /* Source Demand Routing */
  181 #define IPPROTO_ROUTING         43              /* IP6 routing header */
  182 #define IPPROTO_FRAGMENT        44              /* IP6 fragmentation header */
  183 #define IPPROTO_IDRP            45              /* InterDomain Routing*/
  184 #define IPPROTO_RSVP            46              /* resource reservation */
  185 #define IPPROTO_GRE             47              /* General Routing Encap. */
  186 #define IPPROTO_MHRP            48              /* Mobile Host Routing */
  187 #define IPPROTO_BHA             49              /* BHA */
  188 #define IPPROTO_ESP             50              /* IP6 Encap Sec. Payload */
  189 #define IPPROTO_AH              51              /* IP6 Auth Header */
  190 #define IPPROTO_INLSP           52              /* Integ. Net Layer Security */
  191 #define IPPROTO_SWIPE           53              /* IP with encryption */
  192 #define IPPROTO_NHRP            54              /* Next Hop Resolution */
  193 #define IPPROTO_MOBILE          55              /* IP Mobility */
  194 #define IPPROTO_TLSP            56              /* Transport Layer Security */
  195 #define IPPROTO_SKIP            57              /* SKIP */
  196 #define IPPROTO_ICMPV6          58              /* ICMP6 */
  197 #define IPPROTO_NONE            59              /* IP6 no next header */
  198 #define IPPROTO_DSTOPTS         60              /* IP6 destination option */
  199 #define IPPROTO_AHIP            61              /* any host internal protocol */
  200 #define IPPROTO_CFTP            62              /* CFTP */
  201 #define IPPROTO_HELLO           63              /* "hello" routing protocol */
  202 #define IPPROTO_SATEXPAK        64              /* SATNET/Backroom EXPAK */
  203 #define IPPROTO_KRYPTOLAN       65              /* Kryptolan */
  204 #define IPPROTO_RVD             66              /* Remote Virtual Disk */
  205 #define IPPROTO_IPPC            67              /* Pluribus Packet Core */
  206 #define IPPROTO_ADFS            68              /* Any distributed FS */
  207 #define IPPROTO_SATMON          69              /* Satnet Monitoring */
  208 #define IPPROTO_VISA            70              /* VISA Protocol */
  209 #define IPPROTO_IPCV            71              /* Packet Core Utility */
  210 #define IPPROTO_CPNX            72              /* Comp. Prot. Net. Executive */
  211 #define IPPROTO_CPHB            73              /* Comp. Prot. HeartBeat */
  212 #define IPPROTO_WSN             74              /* Wang Span Network */
  213 #define IPPROTO_PVP             75              /* Packet Video Protocol */
  214 #define IPPROTO_BRSATMON        76              /* BackRoom SATNET Monitoring */
  215 #define IPPROTO_ND              77              /* Sun net disk proto (temp.) */
  216 #define IPPROTO_WBMON           78              /* WIDEBAND Monitoring */
  217 #define IPPROTO_WBEXPAK         79              /* WIDEBAND EXPAK */
  218 #define IPPROTO_EON             80              /* ISO cnlp */
  219 #define IPPROTO_VMTP            81              /* VMTP */
  220 #define IPPROTO_SVMTP           82              /* Secure VMTP */
  221 #define IPPROTO_VINES           83              /* Banyon VINES */
  222 #define IPPROTO_TTP             84              /* TTP */
  223 #define IPPROTO_IGP             85              /* NSFNET-IGP */
  224 #define IPPROTO_DGP             86              /* dissimilar gateway prot. */
  225 #define IPPROTO_TCF             87              /* TCF */
  226 #define IPPROTO_IGRP            88              /* Cisco/GXS IGRP */
  227 #define IPPROTO_OSPFIGP         89              /* OSPFIGP */
  228 #define IPPROTO_SRPC            90              /* Strite RPC protocol */
  229 #define IPPROTO_LARP            91              /* Locus Address Resoloution */
  230 #define IPPROTO_MTP             92              /* Multicast Transport */
  231 #define IPPROTO_AX25            93              /* AX.25 Frames */
  232 #define IPPROTO_IPEIP           94              /* IP encapsulated in IP */
  233 #define IPPROTO_MICP            95              /* Mobile Int.ing control */
  234 #define IPPROTO_SCCSP           96              /* Semaphore Comm. security */
  235 #define IPPROTO_ETHERIP         97              /* Ethernet IP encapsulation */
  236 #define IPPROTO_ENCAP           98              /* encapsulation header */
  237 #define IPPROTO_APES            99              /* any private encr. scheme */
  238 #define IPPROTO_GMTP            100             /* GMTP*/
  239 #define IPPROTO_IPCOMP          108             /* payload compression (IPComp) */
  240 #define IPPROTO_SCTP            132             /* SCTP */
  241 #define IPPROTO_MH              135             /* IPv6 Mobility Header */
  242 #define IPPROTO_UDPLITE         136             /* UDP-Lite */
  243 #define IPPROTO_HIP             139             /* IP6 Host Identity Protocol */
  244 #define IPPROTO_SHIM6           140             /* IP6 Shim6 Protocol */
  245 /* 101-254: Partly Unassigned */
  246 #define IPPROTO_PIM             103             /* Protocol Independent Mcast */
  247 #define IPPROTO_CARP            112             /* CARP */
  248 #define IPPROTO_PGM             113             /* PGM */
  249 #define IPPROTO_MPLS            137             /* MPLS-in-IP */
  250 #define IPPROTO_PFSYNC          240             /* PFSYNC */
  251 #define IPPROTO_RESERVED_253    253             /* Reserved */
  252 #define IPPROTO_RESERVED_254    254             /* Reserved */
  253 /* 255: Reserved */
  254 /* BSD Private, local use, namespace incursion, no longer used */
  255 #define IPPROTO_OLD_DIVERT      254             /* OLD divert pseudo-proto */
  256 #define IPPROTO_MAX             256
  257 
  258 /* last return value of *_input(), meaning "all job for this pkt is done".  */
  259 #define IPPROTO_DONE            257
  260 
  261 /* Only used internally, so can be outside the range of valid IP protocols. */
  262 #define IPPROTO_DIVERT          258             /* divert pseudo-protocol */
  263 #define IPPROTO_SEND            259             /* SeND pseudo-protocol */
  264 
  265 /*
  266  * Defined to avoid confusion.  The master value is defined by
  267  * PROTO_SPACER in sys/protosw.h.
  268  */
  269 #define IPPROTO_SPACER          32767           /* spacer for loadable protos */
  270 
  271 /*
  272  * Local port number conventions:
  273  *
  274  * When a user does a bind(2) or connect(2) with a port number of zero,
  275  * a non-conflicting local port address is chosen.
  276  * The default range is IPPORT_HIFIRSTAUTO through
  277  * IPPORT_HILASTAUTO, although that is settable by sysctl.
  278  *
  279  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
  280  * default assignment range.
  281  *
  282  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
  283  *
  284  * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers
  285  * into the "high" range.  These are reserved for client outbound connections
  286  * which do not want to be filtered by any firewalls.
  287  *
  288  * The value IP_PORTRANGE_LOW changes the range to the "low" are
  289  * that is (by convention) restricted to privileged processes.  This
  290  * convention is based on "vouchsafe" principles only.  It is only secure
  291  * if you trust the remote host to restrict these ports.
  292  *
  293  * The default range of ports and the high range can be changed by
  294  * sysctl(3).  (net.inet.ip.portrange.{hi,low,}{first,last})
  295  *
  296  * Changing those values has bad security implications if you are
  297  * using a stateless firewall that is allowing packets outside of that
  298  * range in order to allow transparent outgoing connections.
  299  *
  300  * Such a firewall configuration will generally depend on the use of these
  301  * default values.  If you change them, you may find your Security
  302  * Administrator looking for you with a heavy object.
  303  *
  304  * For a slightly more orthodox text view on this:
  305  *
  306  *            ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers
  307  *
  308  *    port numbers are divided into three ranges:
  309  *
  310  *                0 -  1023 Well Known Ports
  311  *             1024 - 49151 Registered Ports
  312  *            49152 - 65535 Dynamic and/or Private Ports
  313  *
  314  */
  315 
  316 /*
  317  * Ports < IPPORT_RESERVED are reserved for
  318  * privileged processes (e.g. root).         (IP_PORTRANGE_LOW)
  319  */
  320 #define IPPORT_RESERVED         1024
  321 
  322 /*
  323  * Default local port range, used by IP_PORTRANGE_DEFAULT
  324  */
  325 #define IPPORT_EPHEMERALFIRST   10000
  326 #define IPPORT_EPHEMERALLAST    65535 
  327  
  328 /*
  329  * Dynamic port range, used by IP_PORTRANGE_HIGH.
  330  */
  331 #define IPPORT_HIFIRSTAUTO      49152
  332 #define IPPORT_HILASTAUTO       65535
  333 
  334 /*
  335  * Scanning for a free reserved port return a value below IPPORT_RESERVED,
  336  * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was
  337  * 512, but that conflicts with some well-known-services that firewalls may
  338  * have a fit if we use.
  339  */
  340 #define IPPORT_RESERVEDSTART    600
  341 
  342 #define IPPORT_MAX              65535
  343 
  344 /*
  345  * Definitions of bits in internet address integers.
  346  * On subnets, the decomposition of addresses to host and net parts
  347  * is done according to subnet mask, not the masks here.
  348  */
  349 #define IN_CLASSA(i)            (((in_addr_t)(i) & 0x80000000) == 0)
  350 #define IN_CLASSA_NET           0xff000000
  351 #define IN_CLASSA_NSHIFT        24
  352 #define IN_CLASSA_HOST          0x00ffffff
  353 #define IN_CLASSA_MAX           128
  354 
  355 #define IN_CLASSB(i)            (((in_addr_t)(i) & 0xc0000000) == 0x80000000)
  356 #define IN_CLASSB_NET           0xffff0000
  357 #define IN_CLASSB_NSHIFT        16
  358 #define IN_CLASSB_HOST          0x0000ffff
  359 #define IN_CLASSB_MAX           65536
  360 
  361 #define IN_CLASSC(i)            (((in_addr_t)(i) & 0xe0000000) == 0xc0000000)
  362 #define IN_CLASSC_NET           0xffffff00
  363 #define IN_CLASSC_NSHIFT        8
  364 #define IN_CLASSC_HOST          0x000000ff
  365 
  366 #define IN_CLASSD(i)            (((in_addr_t)(i) & 0xf0000000) == 0xe0000000)
  367 #define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */
  368 #define IN_CLASSD_NSHIFT        28              /* net and host fields, but */
  369 #define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */
  370 #define IN_MULTICAST(i)         IN_CLASSD(i)
  371 
  372 #define IN_EXPERIMENTAL(i)      (((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
  373 #define IN_BADCLASS(i)          (((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
  374 
  375 #define IN_LINKLOCAL(i)         (((in_addr_t)(i) & 0xffff0000) == 0xa9fe0000)
  376 #define IN_LOOPBACK(i)          (((in_addr_t)(i) & 0xff000000) == 0x7f000000)
  377 #define IN_ZERONET(i)           (((in_addr_t)(i) & 0xff000000) == 0)
  378 
  379 #define IN_PRIVATE(i)   ((((in_addr_t)(i) & 0xff000000) == 0x0a000000) || \
  380                          (((in_addr_t)(i) & 0xfff00000) == 0xac100000) || \
  381                          (((in_addr_t)(i) & 0xffff0000) == 0xc0a80000))
  382 
  383 #define IN_LOCAL_GROUP(i)       (((in_addr_t)(i) & 0xffffff00) == 0xe0000000)
  384  
  385 #define IN_ANY_LOCAL(i)         (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))
  386 
  387 #define INADDR_LOOPBACK         ((in_addr_t)0x7f000001)
  388 #ifndef _KERNEL
  389 #define INADDR_NONE             ((in_addr_t)0xffffffff) /* -1 return */
  390 #endif
  391 
  392 #define INADDR_UNSPEC_GROUP     ((in_addr_t)0xe0000000) /* 224.0.0.0 */
  393 #define INADDR_ALLHOSTS_GROUP   ((in_addr_t)0xe0000001) /* 224.0.0.1 */
  394 #define INADDR_ALLRTRS_GROUP    ((in_addr_t)0xe0000002) /* 224.0.0.2 */
  395 #define INADDR_ALLRPTS_GROUP    ((in_addr_t)0xe0000016) /* 224.0.0.22, IGMPv3 */
  396 #define INADDR_CARP_GROUP       ((in_addr_t)0xe0000012) /* 224.0.0.18 */
  397 #define INADDR_PFSYNC_GROUP     ((in_addr_t)0xe00000f0) /* 224.0.0.240 */
  398 #define INADDR_ALLMDNS_GROUP    ((in_addr_t)0xe00000fb) /* 224.0.0.251 */
  399 #define INADDR_MAX_LOCAL_GROUP  ((in_addr_t)0xe00000ff) /* 224.0.0.255 */
  400 
  401 #define IN_LOOPBACKNET          127                     /* official! */
  402 
  403 #define IN_RFC3021_MASK         ((in_addr_t)0xfffffffe)
  404 
  405 /*
  406  * Options for use with [gs]etsockopt at the IP level.
  407  * First word of comment is data type; bool is stored in int.
  408  */
  409 #define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
  410 #define IP_HDRINCL              2    /* int; header is included with data */
  411 #define IP_TOS                  3    /* int; IP type of service and preced. */
  412 #define IP_TTL                  4    /* int; IP time to live */
  413 #define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
  414 #define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
  415 #define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
  416 #define IP_SENDSRCADDR          IP_RECVDSTADDR /* cmsg_type to set src addr */
  417 #define IP_RETOPTS              8    /* ip_opts; set/get IP options */
  418 #define IP_MULTICAST_IF         9    /* struct in_addr *or* struct ip_mreqn;
  419                                       * set/get IP multicast i/f  */
  420 #define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
  421 #define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
  422 #define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
  423 #define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
  424 #define IP_MULTICAST_VIF        14   /* set/get IP mcast virt. iface */
  425 #define IP_RSVP_ON              15   /* enable RSVP in kernel */
  426 #define IP_RSVP_OFF             16   /* disable RSVP in kernel */
  427 #define IP_RSVP_VIF_ON          17   /* set RSVP per-vif socket */
  428 #define IP_RSVP_VIF_OFF         18   /* unset RSVP per-vif socket */
  429 #define IP_PORTRANGE            19   /* int; range to choose for unspec port */
  430 #define IP_RECVIF               20   /* bool; receive reception if w/dgram */
  431 /* for IPSEC */
  432 #define IP_IPSEC_POLICY         21   /* int; set/get security policy */
  433                                      /* unused; was IP_FAITH */
  434 #define IP_ONESBCAST            23   /* bool: send all-ones broadcast */
  435 #define IP_BINDANY              24   /* bool: allow bind to any address */
  436 #define IP_BINDMULTI            25   /* bool: allow multiple listeners on a tuple */
  437 #define IP_RSS_LISTEN_BUCKET    26   /* int; set RSS listen bucket */
  438 #define IP_ORIGDSTADDR          27   /* bool: receive IP dst addr/port w/dgram */
  439 #define IP_RECVORIGDSTADDR      IP_ORIGDSTADDR
  440 
  441 /*
  442  * Options for controlling the firewall and dummynet.
  443  * Historical options (from 40 to 64) will eventually be
  444  * replaced by only two options, IP_FW3 and IP_DUMMYNET3.
  445  */
  446 #define IP_FW_TABLE_ADD         40   /* add entry */
  447 #define IP_FW_TABLE_DEL         41   /* delete entry */
  448 #define IP_FW_TABLE_FLUSH       42   /* flush table */
  449 #define IP_FW_TABLE_GETSIZE     43   /* get table size */
  450 #define IP_FW_TABLE_LIST        44   /* list table contents */
  451 
  452 #define IP_FW3                  48   /* generic ipfw v.3 sockopts */
  453 #define IP_DUMMYNET3            49   /* generic dummynet v.3 sockopts */
  454 
  455 #define IP_FW_ADD               50   /* add a firewall rule to chain */
  456 #define IP_FW_DEL               51   /* delete a firewall rule from chain */
  457 #define IP_FW_FLUSH             52   /* flush firewall rule chain */
  458 #define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */
  459 #define IP_FW_GET               54   /* get entire firewall rule chain */
  460 #define IP_FW_RESETLOG          55   /* reset logging counters */
  461 
  462 #define IP_FW_NAT_CFG           56   /* add/config a nat rule */
  463 #define IP_FW_NAT_DEL           57   /* delete a nat rule */
  464 #define IP_FW_NAT_GET_CONFIG    58   /* get configuration of a nat rule */
  465 #define IP_FW_NAT_GET_LOG       59   /* get log of a nat rule */
  466 
  467 #define IP_DUMMYNET_CONFIGURE   60   /* add/configure a dummynet pipe */
  468 #define IP_DUMMYNET_DEL         61   /* delete a dummynet pipe from chain */
  469 #define IP_DUMMYNET_FLUSH       62   /* flush dummynet */
  470 #define IP_DUMMYNET_GET         64   /* get entire dummynet pipes */
  471 
  472 #define IP_RECVTTL              65   /* bool; receive IP TTL w/dgram */
  473 #define IP_MINTTL               66   /* minimum TTL for packet or drop */
  474 #define IP_DONTFRAG             67   /* don't fragment packet */
  475 #define IP_RECVTOS              68   /* bool; receive IP TOS w/dgram */
  476 
  477 /* IPv4 Source Filter Multicast API [RFC3678] */
  478 #define IP_ADD_SOURCE_MEMBERSHIP        70   /* join a source-specific group */
  479 #define IP_DROP_SOURCE_MEMBERSHIP       71   /* drop a single source */
  480 #define IP_BLOCK_SOURCE                 72   /* block a source */
  481 #define IP_UNBLOCK_SOURCE               73   /* unblock a source */
  482 
  483 /* The following option is private; do not use it from user applications. */
  484 #define IP_MSFILTER                     74   /* set/get filter list */
  485 
  486 /* The following option deals with the 802.1Q Ethernet Priority Code Point */
  487 #define IP_VLAN_PCP             75   /* int; set/get PCP used for packet, */
  488                                      /*      -1 use interface default */
  489 
  490 /* Protocol Independent Multicast API [RFC3678] */
  491 #define MCAST_JOIN_GROUP                80   /* join an any-source group */
  492 #define MCAST_LEAVE_GROUP               81   /* leave all sources for group */
  493 #define MCAST_JOIN_SOURCE_GROUP         82   /* join a source-specific group */
  494 #define MCAST_LEAVE_SOURCE_GROUP        83   /* leave a single source */
  495 #define MCAST_BLOCK_SOURCE              84   /* block a source */
  496 #define MCAST_UNBLOCK_SOURCE            85   /* unblock a source */
  497 
  498 /* Flow and RSS definitions */
  499 #define IP_FLOWID               90   /* get flow id for the given socket/inp */
  500 #define IP_FLOWTYPE             91   /* get flow type (M_HASHTYPE) */
  501 #define IP_RSSBUCKETID          92   /* get RSS flowid -> bucket mapping */
  502 #define IP_RECVFLOWID           93   /* bool; receive IP flowid/flowtype w/ datagram */
  503 #define IP_RECVRSSBUCKETID      94   /* bool; receive IP RSS bucket id w/ datagram */
  504 
  505 /*
  506  * Defaults and limits for options
  507  */
  508 #define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
  509 #define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
  510 
  511 /*
  512  * Limit for IPv4 multicast memberships
  513  */
  514 #define IP_MAX_MEMBERSHIPS      4095
  515 
  516 /*
  517  * Default resource limits for IPv4 multicast source filtering.
  518  * These may be modified by sysctl.
  519  */
  520 #define IP_MAX_GROUP_SRC_FILTER         512     /* sources per group */
  521 #define IP_MAX_SOCK_SRC_FILTER          128     /* sources per socket/group */
  522 #define IP_MAX_SOCK_MUTE_FILTER         128     /* XXX no longer used */
  523 
  524 /*
  525  * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
  526  */
  527 struct ip_mreq {
  528         struct  in_addr imr_multiaddr;  /* IP multicast address of group */
  529         struct  in_addr imr_interface;  /* local IP address of interface */
  530 };
  531 
  532 /*
  533  * Modified argument structure for IP_MULTICAST_IF, obtained from Linux.
  534  * This is used to specify an interface index for multicast sends, as
  535  * the IPv4 legacy APIs do not support this (unless IP_SENDIF is available).
  536  */
  537 struct ip_mreqn {
  538         struct  in_addr imr_multiaddr;  /* IP multicast address of group */
  539         struct  in_addr imr_address;    /* local IP address of interface */
  540         int             imr_ifindex;    /* Interface index; cast to uint32_t */
  541 };
  542 
  543 /*
  544  * Argument structure for IPv4 Multicast Source Filter APIs. [RFC3678]
  545  */
  546 struct ip_mreq_source {
  547         struct  in_addr imr_multiaddr;  /* IP multicast address of group */
  548         struct  in_addr imr_sourceaddr; /* IP address of source */
  549         struct  in_addr imr_interface;  /* local IP address of interface */
  550 };
  551 
  552 /*
  553  * Argument structures for Protocol-Independent Multicast Source
  554  * Filter APIs. [RFC3678]
  555  */
  556 struct group_req {
  557         uint32_t                gr_interface;   /* interface index */
  558         struct sockaddr_storage gr_group;       /* group address */
  559 };
  560 
  561 struct group_source_req {
  562         uint32_t                gsr_interface;  /* interface index */
  563         struct sockaddr_storage gsr_group;      /* group address */
  564         struct sockaddr_storage gsr_source;     /* source address */
  565 };
  566 
  567 #ifndef __MSFILTERREQ_DEFINED
  568 #define __MSFILTERREQ_DEFINED
  569 /*
  570  * The following structure is private; do not use it from user applications.
  571  * It is used to communicate IP_MSFILTER/IPV6_MSFILTER information between
  572  * the RFC 3678 libc functions and the kernel.
  573  */
  574 struct __msfilterreq {
  575         uint32_t                 msfr_ifindex;  /* interface index */
  576         uint32_t                 msfr_fmode;    /* filter mode for group */
  577         uint32_t                 msfr_nsrcs;    /* # of sources in msfr_srcs */
  578         struct sockaddr_storage  msfr_group;    /* group address */
  579         struct sockaddr_storage *msfr_srcs;     /* pointer to the first member
  580                                                  * of a contiguous array of
  581                                                  * sources to filter in full.
  582                                                  */
  583 };
  584 #endif
  585 
  586 struct sockaddr;
  587 
  588 /*
  589  * Advanced (Full-state) APIs [RFC3678]
  590  * The RFC specifies uint_t for the 6th argument to [sg]etsourcefilter().
  591  * We use uint32_t here to be consistent.
  592  */
  593 int     setipv4sourcefilter(int, struct in_addr, struct in_addr, uint32_t,
  594             uint32_t, struct in_addr *);
  595 int     getipv4sourcefilter(int, struct in_addr, struct in_addr, uint32_t *,
  596             uint32_t *, struct in_addr *);
  597 int     setsourcefilter(int, uint32_t, struct sockaddr *, socklen_t,
  598             uint32_t, uint32_t, struct sockaddr_storage *);
  599 int     getsourcefilter(int, uint32_t, struct sockaddr *, socklen_t,
  600             uint32_t *, uint32_t *, struct sockaddr_storage *);
  601 
  602 /*
  603  * Filter modes; also used to represent per-socket filter mode internally.
  604  */
  605 #define MCAST_UNDEFINED 0       /* fmode: not yet defined */
  606 #define MCAST_INCLUDE   1       /* fmode: include these source(s) */
  607 #define MCAST_EXCLUDE   2       /* fmode: exclude these source(s) */
  608 
  609 /*
  610  * Argument for IP_PORTRANGE:
  611  * - which range to search when port is unspecified at bind() or connect()
  612  */
  613 #define IP_PORTRANGE_DEFAULT    0       /* default range */
  614 #define IP_PORTRANGE_HIGH       1       /* "high" - request firewall bypass */
  615 #define IP_PORTRANGE_LOW        2       /* "low" - vouchsafe security */
  616 
  617 /*
  618  * Identifiers for IP sysctl nodes
  619  */
  620 #define IPCTL_FORWARDING        1       /* act as router */
  621 #define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
  622 #define IPCTL_DEFTTL            3       /* default TTL */
  623 #ifdef notyet
  624 #define IPCTL_DEFMTU            4       /* default MTU */
  625 #endif
  626 /*      IPCTL_RTEXPIRE          5       deprecated */
  627 /*      IPCTL_RTMINEXPIRE       6       deprecated */
  628 /*      IPCTL_RTMAXCACHE        7       deprecated */
  629 #define IPCTL_SOURCEROUTE       8       /* may perform source routes */
  630 #define IPCTL_DIRECTEDBROADCAST 9       /* may re-broadcast received packets */
  631 #define IPCTL_INTRQMAXLEN       10      /* max length of netisr queue */
  632 #define IPCTL_INTRQDROPS        11      /* number of netisr q drops */
  633 #define IPCTL_STATS             12      /* ipstat structure */
  634 #define IPCTL_ACCEPTSOURCEROUTE 13      /* may accept source routed packets */
  635 #define IPCTL_FASTFORWARDING    14      /* use fast IP forwarding code */
  636                                         /* 15, unused, was: IPCTL_KEEPFAITH  */
  637 #define IPCTL_GIF_TTL           16      /* default TTL for gif encap packet */
  638 #define IPCTL_INTRDQMAXLEN      17      /* max length of direct netisr queue */
  639 #define IPCTL_INTRDQDROPS       18      /* number of direct netisr q drops */
  640 
  641 #endif /* __BSD_VISIBLE */
  642 
  643 #ifdef _KERNEL
  644 
  645 struct ifnet; struct mbuf;      /* forward declarations for Standard C */
  646 struct in_ifaddr;
  647 
  648 int      in_broadcast(struct in_addr, struct ifnet *);
  649 int      in_ifaddr_broadcast(struct in_addr, struct in_ifaddr *);
  650 int      in_canforward(struct in_addr);
  651 int      in_localaddr(struct in_addr);
  652 int      in_localip(struct in_addr);
  653 int      in_ifhasaddr(struct ifnet *, struct in_addr);
  654 int      inet_aton(const char *, struct in_addr *); /* in libkern */
  655 char    *inet_ntoa_r(struct in_addr ina, char *buf); /* in libkern */
  656 char    *inet_ntop(int, const void *, char *, socklen_t); /* in libkern */
  657 int      inet_pton(int af, const char *, void *); /* in libkern */
  658 void     in_ifdetach(struct ifnet *);
  659 
  660 #define in_hosteq(s, t) ((s).s_addr == (t).s_addr)
  661 #define in_nullhost(x)  ((x).s_addr == INADDR_ANY)
  662 #define in_allhosts(x)  ((x).s_addr == htonl(INADDR_ALLHOSTS_GROUP))
  663 
  664 #define satosin(sa)     ((struct sockaddr_in *)(sa))
  665 #define sintosa(sin)    ((struct sockaddr *)(sin))
  666 #define ifatoia(ifa)    ((struct in_ifaddr *)(ifa))
  667 #endif /* _KERNEL */
  668 
  669 /* INET6 stuff */
  670 #if __POSIX_VISIBLE >= 200112
  671 #define __KAME_NETINET_IN_H_INCLUDED_
  672 #include <netinet6/in6.h>
  673 #undef __KAME_NETINET_IN_H_INCLUDED_
  674 #endif
  675 
  676 #endif /* !_NETINET_IN_H_*/

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