sys/netinet/in.h

   1 /*      $NetBSD: in.h,v 1.86 2009/09/14 10:36:50 degroote Exp $ */
   2
   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  */
  33
  34 /*
  35  * Constants and structures defined by the internet system,
  36  * Per RFC 790, September 1981, and numerous additions.
  37  */
  38
  39 #ifndef _NETINET_IN_H_
  40 #define _NETINET_IN_H_
  41
  42 #include <machine/int_types.h>
  43
  44 #ifndef uint8_t
  45 typedef __uint8_t       uint8_t;
  46 #define uint8_t         __uint8_t
  47 #endif
  48
  49 #ifndef uint32_t
  50 typedef __uint32_t      uint32_t;
  51 #define uint32_t        __uint32_t
  52 #endif
  53
  54 #include <sys/ansi.h>
  55
  56 #ifndef in_addr_t
  57 typedef __in_addr_t     in_addr_t;
  58 #define in_addr_t       __in_addr_t
  59 #endif
  60
  61 #ifndef in_port_t
  62 typedef __in_port_t     in_port_t;
  63 #define in_port_t       __in_port_t
  64 #endif
  65
  66 #ifndef sa_family_t
  67 typedef __sa_family_t   sa_family_t;
  68 #define sa_family_t     __sa_family_t
  69 #endif
  70
  71 /*
  72  * Protocols
  73  */
  74 #define IPPROTO_IP              0               /* dummy for IP */
  75 #define IPPROTO_HOPOPTS         0               /* IP6 hop-by-hop options */
  76 #define IPPROTO_ICMP            1               /* control message protocol */
  77 #define IPPROTO_IGMP            2               /* group mgmt protocol */
  78 #define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
  79 #define IPPROTO_IPV4            4               /* IP header */
  80 #define IPPROTO_IPIP            4               /* IP inside IP */
  81 #define IPPROTO_TCP             6               /* tcp */
  82 #define IPPROTO_EGP             8               /* exterior gateway protocol */
  83 #define IPPROTO_PUP             12              /* pup */
  84 #define IPPROTO_UDP             17              /* user datagram protocol */
  85 #define IPPROTO_IDP             22              /* xns idp */
  86 #define IPPROTO_TP              29              /* tp-4 w/ class negotiation */
  87 #define IPPROTO_IPV6            41              /* IP6 header */
  88 #define IPPROTO_ROUTING         43              /* IP6 routing header */
  89 #define IPPROTO_FRAGMENT        44              /* IP6 fragmentation header */
  90 #define IPPROTO_RSVP            46              /* resource reservation */
  91 #define IPPROTO_GRE             47              /* GRE encaps RFC 1701 */
  92 #define IPPROTO_ESP             50              /* encap. security payload */
  93 #define IPPROTO_AH              51              /* authentication header */
  94 #define IPPROTO_MOBILE          55              /* IP Mobility RFC 2004 */
  95 #define IPPROTO_IPV6_ICMP       58              /* IPv6 ICMP */
  96 #define IPPROTO_ICMPV6          58              /* ICMP6 */
  97 #define IPPROTO_NONE            59              /* IP6 no next header */
  98 #define IPPROTO_DSTOPTS         60              /* IP6 destination option */
  99 #define IPPROTO_EON             80              /* ISO cnlp */
 100 #define IPPROTO_ETHERIP         97              /* Ethernet-in-IP */
 101 #define IPPROTO_ENCAP           98              /* encapsulation header */
 102 #define IPPROTO_PIM             103             /* Protocol indep. multicast */
 103 #define IPPROTO_IPCOMP          108             /* IP Payload Comp. Protocol */
 104 #define IPPROTO_VRRP            112             /* VRRP RFC 2338 */
 105 #define IPPROTO_CARP            112             /* Common Address Resolution Protocol */
 106 #define IPPROTO_PFSYNC      240     /* PFSYNC */
 107 #define IPPROTO_RAW             255             /* raw IP packet */
 108 #define IPPROTO_MAX             256
 109
 110 /* last return value of *_input(), meaning "all job for this pkt is done".  */
 111 #define IPPROTO_DONE            257
 112
 113 /* sysctl placeholder for (FAST_)IPSEC */
 114 #define CTL_IPPROTO_IPSEC       258
 115
 116
 117 /*
 118  * Local port number conventions:
 119  *
 120  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
 121  * unless a kernel is compiled with IPNOPRIVPORTS defined.
 122  *
 123  * When a user does a bind(2) or connect(2) with a port number of zero,
 124  * a non-conflicting local port address is chosen.
 125  *
 126  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
 127  * that is settable by sysctl(3); net.inet.ip.anonportmin and
 128  * net.inet.ip.anonportmax respectively.
 129  *
 130  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
 131  * default assignment range.
 132  *
 133  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 134  *
 135  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 136  * and exists only for FreeBSD compatibility purposes.
 137  *
 138  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 139  * that is (by convention) restricted to privileged processes.
 140  * This convention is based on "vouchsafe" principles only.
 141  * It is only secure if you trust the remote host to restrict these ports.
 142  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 143  */
 144
 145 #define IPPORT_RESERVED         1024
 146 #define IPPORT_ANONMIN          49152
 147 #define IPPORT_ANONMAX          65535
 148 #define IPPORT_RESERVEDMIN      600
 149 #define IPPORT_RESERVEDMAX      (IPPORT_RESERVED-1)
 150
 151 /*
 152  * Internet address (a structure for historical reasons)
 153  */
 154 struct in_addr {
 155         in_addr_t s_addr;
 156 } __packed;
 157
 158 /*
 159  * Definitions of bits in internet address integers.
 160  * On subnets, the decomposition of addresses to host and net parts
 161  * is done according to subnet mask, not the masks here.
 162  *
 163  * By byte-swapping the constants, we avoid ever having to byte-swap IP
 164  * addresses inside the kernel.  Unfortunately, user-level programs rely
 165  * on these macros not doing byte-swapping.
 166  */
 167 #ifdef _KERNEL
 168 #define __IPADDR(x)     ((uint32_t) htonl((uint32_t)(x)))
 169 #else
 170 #define __IPADDR(x)     ((uint32_t)(x))
 171 #endif
 172
 173 #define IN_CLASSA(i)            (((uint32_t)(i) & __IPADDR(0x80000000)) == \
 174                                  __IPADDR(0x00000000))
 175 #define IN_CLASSA_NET           __IPADDR(0xff000000)
 176 #define IN_CLASSA_NSHIFT        24
 177 #define IN_CLASSA_HOST          __IPADDR(0x00ffffff)
 178 #define IN_CLASSA_MAX           128
 179
 180 #define IN_CLASSB(i)            (((uint32_t)(i) & __IPADDR(0xc0000000)) == \
 181                                  __IPADDR(0x80000000))
 182 #define IN_CLASSB_NET           __IPADDR(0xffff0000)
 183 #define IN_CLASSB_NSHIFT        16
 184 #define IN_CLASSB_HOST          __IPADDR(0x0000ffff)
 185 #define IN_CLASSB_MAX           65536
 186
 187 #define IN_CLASSC(i)            (((uint32_t)(i) & __IPADDR(0xe0000000)) == \
 188                                  __IPADDR(0xc0000000))
 189 #define IN_CLASSC_NET           __IPADDR(0xffffff00)
 190 #define IN_CLASSC_NSHIFT        8
 191 #define IN_CLASSC_HOST          __IPADDR(0x000000ff)
 192
 193 #define IN_CLASSD(i)            (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
 194                                  __IPADDR(0xe0000000))
 195 /* These ones aren't really net and host fields, but routing needn't know. */
 196 #define IN_CLASSD_NET           __IPADDR(0xf0000000)
 197 #define IN_CLASSD_NSHIFT        28
 198 #define IN_CLASSD_HOST          __IPADDR(0x0fffffff)
 199 #define IN_MULTICAST(i)         IN_CLASSD(i)
 200
 201 #define IN_EXPERIMENTAL(i)      (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
 202                                  __IPADDR(0xf0000000))
 203 #define IN_BADCLASS(i)          (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
 204                                  __IPADDR(0xf0000000))
 205
 206 #define IN_LINKLOCAL(i) (((uint32_t)(i) & __IPADDR(0xffff0000)) == \
 207                          __IPADDR(0xa9fe0000))
 208
 209 #define IN_PRIVATE(i)   ((((uint32_t)(i) & __IPADDR(0xff000000)) ==     \
 210                           __IPADDR(0x0a000000)) ||                      \
 211                          (((uint32_t)(i) & __IPADDR(0xfff00000)) ==     \
 212                           __IPADDR(0xac100000)) ||                      \
 213                          (((uint32_t)(i) & __IPADDR(0xffff0000)) ==     \
 214                           __IPADDR(0xc0a80000)))
 215
 216 #define IN_LOCAL_GROUP(i)       (((uint32_t)(i) & __IPADDR(0xffffff00)) == \
 217                                  __IPADDR(0xe0000000))
 218
 219 #define IN_ANY_LOCAL(i)         (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))
 220
 221 #define INADDR_ANY              __IPADDR(0x00000000)
 222 #define INADDR_LOOPBACK         __IPADDR(0x7f000001)
 223 #define INADDR_BROADCAST        __IPADDR(0xffffffff)    /* must be masked */
 224 #define INADDR_NONE             __IPADDR(0xffffffff)    /* -1 return */
 225
 226 #define INADDR_UNSPEC_GROUP     __IPADDR(0xe0000000)    /* 224.0.0.0 */
 227 #define INADDR_ALLHOSTS_GROUP   __IPADDR(0xe0000001)    /* 224.0.0.1 */
 228 #define INADDR_ALLRTRS_GROUP    __IPADDR(0xe0000002)    /* 224.0.0.2 */
 229 #define INADDR_CARP_GROUP       __IPADDR(0xe0000012)    /* 224.0.0.18 */
 230 #define INADDR_MAX_LOCAL_GROUP  __IPADDR(0xe00000ff)    /* 224.0.0.255 */
 231
 232 #define IN_LOOPBACKNET          127                     /* official! */
 233
 234 /*
 235  * Socket address, internet style.
 236  */
 237 struct sockaddr_in {
 238         uint8_t         sin_len;
 239         sa_family_t     sin_family;
 240         in_port_t       sin_port;
 241         struct in_addr  sin_addr;
 242         __int8_t        sin_zero[8];
 243 };
 244
 245 #define INET_ADDRSTRLEN                 16
 246
 247 /*
 248  * Structure used to describe IP options.
 249  * Used to store options internally, to pass them to a process,
 250  * or to restore options retrieved earlier.
 251  * The ip_dst is used for the first-hop gateway when using a source route
 252  * (this gets put into the header proper).
 253  */
 254 struct ip_opts {
 255         struct in_addr  ip_dst;         /* first hop, 0 w/o src rt */
 256 #if defined(__cplusplus)
 257         __int8_t        Ip_opts[40];    /* actually variable in size */
 258 #else
 259         __int8_t        ip_opts[40];    /* actually variable in size */
 260 #endif
 261 };
 262
 263 /*
 264  * Options for use with [gs]etsockopt at the IP level.
 265  * First word of comment is data type; bool is stored in int.
 266  */
 267 #define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
 268 #define IP_HDRINCL              2    /* int; header is included with data */
 269 #define IP_TOS                  3    /* int; IP type of service and preced. */
 270 #define IP_TTL                  4    /* int; IP time to live */
 271 #define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
 272 #define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
 273 #define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
 274 #define IP_RETOPTS              8    /* ip_opts; set/get IP options */
 275 #define IP_MULTICAST_IF         9    /* in_addr; set/get IP multicast i/f  */
 276 #define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
 277 #define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
 278 #define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
 279 #define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
 280 #define IP_PORTRANGE            19   /* int; range to use for ephemeral port */
 281 #define IP_RECVIF               20   /* bool; receive reception if w/dgram */
 282 #define IP_ERRORMTU             21   /* int; get MTU of last xmit = EMSGSIZE */
 283 #if 1 /*IPSEC*/
 284 #define IP_IPSEC_POLICY         22 /* struct; get/set security policy */
 285 #endif
 286 #define IP_RECVTTL              23   /* bool; receive IP TTL w/dgram */
 287 #define IP_MINTTL               24   /* minimum TTL for packet or drop */
 288
 289 /*
 290  * Defaults and limits for options
 291  */
 292 #define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
 293 #define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
 294 #define IP_MAX_MEMBERSHIPS      20      /* per socket; must fit in one mbuf */
 295
 296 /*
 297  * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
 298  */
 299 struct ip_mreq {
 300         struct  in_addr imr_multiaddr;  /* IP multicast address of group */
 301         struct  in_addr imr_interface;  /* local IP address of interface */
 302 };
 303
 304 /*
 305  * Argument for IP_PORTRANGE:
 306  * - which range to search when port is unspecified at bind() or connect()
 307  */
 308 #define IP_PORTRANGE_DEFAULT    0       /* default range */
 309 #define IP_PORTRANGE_HIGH       1       /* same as DEFAULT (FreeBSD compat) */
 310 #define IP_PORTRANGE_LOW        2       /* use privileged range */
 311
 312 #if defined(_NETBSD_SOURCE)
 313 /*
 314  * Definitions for inet sysctl operations.
 315  *
 316  * Third level is protocol number.
 317  * Fourth level is desired variable within that protocol.
 318  */
 319 #define IPPROTO_MAXID   (IPPROTO_AH + 1)        /* don't list to IPPROTO_MAX */
 320
 321 #define CTL_IPPROTO_NAMES { \
 322         { "ip", CTLTYPE_NODE }, \
 323         { "icmp", CTLTYPE_NODE }, \
 324         { "igmp", CTLTYPE_NODE }, \
 325         { "ggp", CTLTYPE_NODE }, \
 326         { 0, 0 }, \
 327         { 0, 0 }, \
 328         { "tcp", CTLTYPE_NODE }, \
 329         { 0, 0 }, \
 330         { "egp", CTLTYPE_NODE }, \
 331         { 0, 0 }, \
 332         { 0, 0 }, \
 333         { 0, 0 }, \
 334         { "pup", CTLTYPE_NODE }, \
 335         { 0, 0 }, \
 336         { 0, 0 }, \
 337         { 0, 0 }, \
 338         { 0, 0 }, \
 339         { "udp", CTLTYPE_NODE }, \
 340         { 0, 0 }, \
 341         { 0, 0 }, \
 342         { 0, 0 }, \
 343         { 0, 0 }, \
 344         { "idp", CTLTYPE_NODE }, \
 345         { 0, 0 }, \
 346         { 0, 0 }, \
 347         { 0, 0 }, \
 348         { 0, 0 }, \
 349         { 0, 0 }, \
 350         { 0, 0 }, \
 351         { 0, 0 }, \
 352         { 0, 0 }, \
 353         { 0, 0 }, \
 354         { 0, 0 }, \
 355         { 0, 0 }, \
 356         { 0, 0 }, \
 357         { 0, 0 }, \
 358         { 0, 0 }, \
 359         { 0, 0 }, \
 360         { 0, 0 }, \
 361         { 0, 0 }, \
 362         { 0, 0 }, \
 363         { 0, 0 }, \
 364         { 0, 0 }, \
 365         { 0, 0 }, \
 366         { 0, 0 }, \
 367         { 0, 0 }, \
 368         { 0, 0 }, \
 369         { 0, 0 }, \
 370         { 0, 0 }, \
 371         { 0, 0 }, \
 372         { 0, 0 }, \
 373         { "ipsec", CTLTYPE_NODE }, \
 374         { 0, 0 }, \
 375         { 0, 0 }, \
 376         { 0, 0 }, \
 377         { 0, 0 }, \
 378         { 0, 0 }, \
 379         { 0, 0 }, \
 380         { 0, 0 }, \
 381         { 0, 0 }, \
 382         { 0, 0 }, \
 383         { 0, 0 }, \
 384         { 0, 0 }, \
 385         { 0, 0 }, \
 386         { 0, 0 }, \
 387         { 0, 0 }, \
 388         { 0, 0 }, \
 389         { 0, 0 }, \
 390         { 0, 0 }, \
 391         { 0, 0 }, \
 392         { 0, 0 }, \
 393         { 0, 0 }, \
 394         { 0, 0 }, \
 395         { 0, 0 }, \
 396         { 0, 0 }, \
 397         { 0, 0 }, \
 398         { 0, 0 }, \
 399         { 0, 0 }, \
 400         { 0, 0 }, \
 401         { 0, 0 }, \
 402         { 0, 0 }, \
 403         { 0, 0 }, \
 404         { 0, 0 }, \
 405         { 0, 0 }, \
 406         { 0, 0 }, \
 407         { 0, 0 }, \
 408         { 0, 0 }, \
 409         { 0, 0 }, \
 410         { 0, 0 }, \
 411         { 0, 0 }, \
 412         { 0, 0 }, \
 413         { 0, 0 }, \
 414         { 0, 0 }, \
 415         { 0, 0 }, \
 416         { 0, 0 }, \
 417         { 0, 0 }, \
 418         { 0, 0 }, \
 419         { 0, 0 }, \
 420         { 0, 0 }, \
 421         { 0, 0 }, \
 422         { 0, 0 }, \
 423         { 0, 0 }, \
 424         { 0, 0 }, \
 425         { "pim", CTLTYPE_NODE }, \
 426 }
 427
 428 /*
 429  * Names for IP sysctl objects
 430  */
 431 #define IPCTL_FORWARDING        1       /* act as router */
 432 #define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
 433 #define IPCTL_DEFTTL            3       /* default TTL */
 434 #ifdef notyet
 435 #define IPCTL_DEFMTU            4       /* default MTU */
 436 #endif
 437 #define IPCTL_FORWSRCRT         5       /* forward source-routed packets */
 438 #define IPCTL_DIRECTEDBCAST     6       /* default broadcast behavior */
 439 #define IPCTL_ALLOWSRCRT        7       /* allow/drop all source-routed pkts */
 440 #define IPCTL_SUBNETSARELOCAL   8       /* treat subnets as local addresses */
 441 #define IPCTL_MTUDISC           9       /* allow path MTU discovery */
 442 #define IPCTL_ANONPORTMIN      10       /* minimum ephemeral port */
 443 #define IPCTL_ANONPORTMAX      11       /* maximum ephemeral port */
 444 #define IPCTL_MTUDISCTIMEOUT   12       /* allow path MTU discovery */
 445 #define IPCTL_MAXFLOWS         13       /* maximum ip flows allowed */
 446 #define IPCTL_HOSTZEROBROADCAST 14      /* is host zero a broadcast addr? */
 447 #define IPCTL_GIF_TTL          15       /* default TTL for gif encap packet */
 448 #define IPCTL_LOWPORTMIN       16       /* minimum reserved port */
 449 #define IPCTL_LOWPORTMAX       17       /* maximum reserved port */
 450 #define IPCTL_MAXFRAGPACKETS   18       /* max packets reassembly queue */
 451 #define IPCTL_GRE_TTL          19       /* default TTL for gre encap packet */
 452 #define IPCTL_CHECKINTERFACE   20       /* drop pkts in from 'wrong' iface */
 453 #define IPCTL_IFQ              21       /* ipintrq node */
 454 #define IPCTL_RANDOMID         22       /* use random IP ids (if configured) */
 455 #define IPCTL_LOOPBACKCKSUM    23       /* do IP checksum on loopback */
 456 #define IPCTL_STATS             24      /* IP statistics */
 457 #define IPCTL_MAXID            25
 458
 459 #define IPCTL_NAMES { \
 460         { 0, 0 }, \
 461         { "forwarding", CTLTYPE_INT }, \
 462         { "redirect", CTLTYPE_INT }, \
 463         { "ttl", CTLTYPE_INT }, \
 464         { "mtu", CTLTYPE_INT }, \
 465         { "forwsrcrt", CTLTYPE_INT }, \
 466         { "directed-broadcast", CTLTYPE_INT }, \
 467         { "allowsrcrt", CTLTYPE_INT }, \
 468         { "subnetsarelocal", CTLTYPE_INT }, \
 469         { "mtudisc", CTLTYPE_INT }, \
 470         { "anonportmin", CTLTYPE_INT }, \
 471         { "anonportmax", CTLTYPE_INT }, \
 472         { "mtudisctimeout", CTLTYPE_INT }, \
 473         { "maxflows", CTLTYPE_INT }, \
 474         { "hostzerobroadcast", CTLTYPE_INT }, \
 475         { "gifttl", CTLTYPE_INT }, \
 476         { "lowportmin", CTLTYPE_INT }, \
 477         { "lowportmax", CTLTYPE_INT }, \
 478         { "maxfragpackets", CTLTYPE_INT }, \
 479         { "grettl", CTLTYPE_INT }, \
 480         { "checkinterface", CTLTYPE_INT }, \
 481         { "ifq", CTLTYPE_NODE }, \
 482         { "random_id", CTLTYPE_INT }, \
 483         { "do_loopback_cksum", CTLTYPE_INT }, \
 484         { "stats", CTLTYPE_STRUCT }, \
 485 }
 486 #endif /* _NETBSD_SOURCE */
 487
 488 /* INET6 stuff */
 489 #define __KAME_NETINET_IN_H_INCLUDED_
 490 #include <netinet6/in6.h>
 491 #undef __KAME_NETINET_IN_H_INCLUDED_
 492
 493 #ifdef _KERNEL
 494 /*
 495  * in_cksum_phdr:
 496  *
 497  *      Compute significant parts of the IPv4 checksum pseudo-header
 498  *      for use in a delayed TCP/UDP checksum calculation.
 499  *
 500  *      Args:
 501  *
 502  *              src             Source IP address
 503  *              dst             Destination IP address
 504  *              lenproto        htons(proto-hdr-len + proto-number)
 505  */
 506 static __inline u_int16_t __unused
 507 in_cksum_phdr(u_int32_t src, u_int32_t dst, u_int32_t lenproto)
 508 {
 509         u_int32_t sum;
 510
 511         sum = lenproto +
 512               (u_int16_t)(src >> 16) +
 513               (u_int16_t)(src /*& 0xffff*/) +
 514               (u_int16_t)(dst >> 16) +
 515               (u_int16_t)(dst /*& 0xffff*/);
 516
 517         sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
 518
 519         if (sum > 0xffff)
 520                 sum -= 0xffff;
 521
 522         return (sum);
 523 }
 524
 525 /*
 526  * in_cksum_addword:
 527  *
 528  *      Add the two 16-bit network-order values, carry, and return.
 529  */
 530 static __inline u_int16_t __unused
 531 in_cksum_addword(u_int16_t a, u_int16_t b)
 532 {
 533         u_int32_t sum = a + b;
 534
 535         if (sum > 0xffff)
 536                 sum -= 0xffff;
 537
 538         return (sum);
 539 }
 540
 541 extern  struct in_addr zeroin_addr;
 542 extern  u_char  ip_protox[];
 543 extern const struct sockaddr_in in_any;
 544
 545 int     in_broadcast(struct in_addr, struct ifnet *);
 546 int     in_canforward(struct in_addr);
 547 int     cpu_in_cksum(struct mbuf *, int, int, uint32_t);
 548 int     in_cksum(struct mbuf *, int);
 549 int     in4_cksum(struct mbuf *, u_int8_t, int, int);
 550 void    in_delayed_cksum(struct mbuf *);
 551 int     in_localaddr(struct in_addr);
 552 void    in_socktrim(struct sockaddr_in *);
 553
 554 #define in_hosteq(s,t)  ((s).s_addr == (t).s_addr)
 555 #define in_nullhost(x)  ((x).s_addr == INADDR_ANY)
 556
 557 #define satosin(sa)     ((struct sockaddr_in *)(sa))
 558 #define satocsin(sa)    ((const struct sockaddr_in *)(sa))
 559 #define sintosa(sin)    ((struct sockaddr *)(sin))
 560 #define sintocsa(sin)   ((const struct sockaddr *)(sin))
 561 #define ifatoia(ifa)    ((struct in_ifaddr *)(ifa))
 562
 563 int sockaddr_in_cmp(const struct sockaddr *, const struct sockaddr *);
 564 const void *sockaddr_in_const_addr(const struct sockaddr *, socklen_t *);
 565 void *sockaddr_in_addr(struct sockaddr *, socklen_t *);
 566
 567 static inline void
 568 sockaddr_in_init1(struct sockaddr_in *sin, const struct in_addr *addr,
 569     in_port_t port)
 570 {
 571         sin->sin_port = port;
 572         sin->sin_addr = *addr;
 573         memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
 574 }
 575
 576 static inline void
 577 sockaddr_in_init(struct sockaddr_in *sin, const struct in_addr *addr,
 578     in_port_t port)
 579 {
 580         sin->sin_family = AF_INET;
 581         sin->sin_len = sizeof(*sin);
 582         sockaddr_in_init1(sin, addr, port);
 583 }
 584
 585 static inline struct sockaddr *
 586 sockaddr_in_alloc(const struct in_addr *addr, in_port_t port, int flags)
 587 {
 588         struct sockaddr *sa;
 589
 590         sa = sockaddr_alloc(AF_INET, sizeof(struct sockaddr_in), flags);
 591
 592         if (sa == NULL)
 593                 return NULL;
 594
 595         sockaddr_in_init1(satosin(sa), addr, port);
 596
 597         return sa;
 598 }
 599 #endif /* _KERNEL */
 600
 601 #endif /* !_NETINET_IN_H_ */