StdLib/Include/netinet/in.h

   1 /*      $NetBSD: in.h,v 1.77 2006/11/13 05:13:41 dyoung 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_RAW             255             /* raw IP packet */
 107 #define IPPROTO_MAX             256
 108
 109 /* last return value of *_input(), meaning "all job for this pkt is done".  */
 110 #define IPPROTO_DONE            257
 111
 112 /* sysctl placeholder for (FAST_)IPSEC */
 113 #define CTL_IPPROTO_IPSEC       258
 114
 115
 116 /*
 117  * Local port number conventions:
 118  *
 119  * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),
 120  * unless a kernel is compiled with IPNOPRIVPORTS defined.
 121  *
 122  * When a user does a bind(2) or connect(2) with a port number of zero,
 123  * a non-conflicting local port address is chosen.
 124  *
 125  * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although
 126  * that is settable by sysctl(3); net.inet.ip.anonportmin and
 127  * net.inet.ip.anonportmax respectively.
 128  *
 129  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this
 130  * default assignment range.
 131  *
 132  * The value IP_PORTRANGE_DEFAULT causes the default behavior.
 133  *
 134  * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,
 135  * and exists only for FreeBSD compatibility purposes.
 136  *
 137  * The value IP_PORTRANGE_LOW changes the range to the "low" are
 138  * that is (by convention) restricted to privileged processes.
 139  * This convention is based on "vouchsafe" principles only.
 140  * It is only secure if you trust the remote host to restrict these ports.
 141  * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.
 142  */
 143
 144 #define IPPORT_RESERVED         1024
 145 #define IPPORT_ANONMIN          49152
 146 #define IPPORT_ANONMAX          65535
 147 #define IPPORT_RESERVEDMIN      600
 148 #define IPPORT_RESERVEDMAX      (IPPORT_RESERVED-1)
 149
 150 /*
 151  * Internet address (a structure for historical reasons)
 152  */
 153 struct in_addr {
 154         in_addr_t s_addr;
 155 } __attribute__((__packed__));
 156
 157 /*
 158  * Definitions of bits in internet address integers.
 159  * On subnets, the decomposition of addresses to host and net parts
 160  * is done according to subnet mask, not the masks here.
 161  *
 162  * By byte-swapping the constants, we avoid ever having to byte-swap IP
 163  * addresses inside the kernel.  Unfortunately, user-level programs rely
 164  * on these macros not doing byte-swapping.
 165  */
 166 #ifdef _KERNEL
 167 #define __IPADDR(x)     ((uint32_t) htonl((uint32_t)(x)))
 168 #else
 169 #define __IPADDR(x)     ((uint32_t)(x))
 170 #endif
 171
 172 #define IN_CLASSA(i)            (((uint32_t)(i) & __IPADDR(0x80000000)) == \
 173                                  __IPADDR(0x00000000))
 174 #define IN_CLASSA_NET           __IPADDR(0xff000000)
 175 #define IN_CLASSA_NSHIFT        24
 176 #define IN_CLASSA_HOST          __IPADDR(0x00ffffff)
 177 #define IN_CLASSA_MAX           128
 178
 179 #define IN_CLASSB(i)            (((uint32_t)(i) & __IPADDR(0xc0000000)) == \
 180                                  __IPADDR(0x80000000))
 181 #define IN_CLASSB_NET           __IPADDR(0xffff0000)
 182 #define IN_CLASSB_NSHIFT        16
 183 #define IN_CLASSB_HOST          __IPADDR(0x0000ffff)
 184 #define IN_CLASSB_MAX           65536
 185
 186 #define IN_CLASSC(i)            (((uint32_t)(i) & __IPADDR(0xe0000000)) == \
 187                                  __IPADDR(0xc0000000))
 188 #define IN_CLASSC_NET           __IPADDR(0xffffff00)
 189 #define IN_CLASSC_NSHIFT        8
 190 #define IN_CLASSC_HOST          __IPADDR(0x000000ff)
 191
 192 #define IN_CLASSD(i)            (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
 193                                  __IPADDR(0xe0000000))
 194 /* These ones aren't really net and host fields, but routing needn't know. */
 195 #define IN_CLASSD_NET           __IPADDR(0xf0000000)
 196 #define IN_CLASSD_NSHIFT        28
 197 #define IN_CLASSD_HOST          __IPADDR(0x0fffffff)
 198 #define IN_MULTICAST(i)         IN_CLASSD(i)
 199
 200 #define IN_EXPERIMENTAL(i)      (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
 201                                  __IPADDR(0xf0000000))
 202 #define IN_BADCLASS(i)          (((uint32_t)(i) & __IPADDR(0xf0000000)) == \
 203                                  __IPADDR(0xf0000000))
 204
 205 #define IN_LINKLOCAL(i) (((uint32_t)(i) & __IPADDR(0xffff0000)) == \
 206                          __IPADDR(0xa9fe0000))
 207
 208 #define IN_PRIVATE(i)   ((((uint32_t)(i) & __IPADDR(0xff000000)) ==     \
 209                           __IPADDR(0x0a000000)) ||                      \
 210                          (((uint32_t)(i) & __IPADDR(0xfff00000)) ==     \
 211                           __IPADDR(0xac100000)) ||                      \
 212                          (((uint32_t)(i) & __IPADDR(0xffff0000)) ==     \
 213                           __IPADDR(0xc0a80000)))
 214
 215 #define IN_LOCAL_GROUP(i)       (((uint32_t)(i) & __IPADDR(0xffffff00)) == \
 216                                  __IPADDR(0xe0000000))
 217
 218 #define IN_ANY_LOCAL(i)         (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))
 219
 220 #define INADDR_ANY              __IPADDR(0x00000000)
 221 #define INADDR_LOOPBACK         __IPADDR(0x7f000001)
 222 #define INADDR_BROADCAST        __IPADDR(0xffffffff)    /* must be masked */
 223 #define INADDR_NONE             __IPADDR(0xffffffff)    /* -1 return */
 224
 225 #define INADDR_UNSPEC_GROUP     __IPADDR(0xe0000000)    /* 224.0.0.0 */
 226 #define INADDR_ALLHOSTS_GROUP   __IPADDR(0xe0000001)    /* 224.0.0.1 */
 227 #define INADDR_ALLRTRS_GROUP    __IPADDR(0xe0000002)    /* 224.0.0.2 */
 228 #define INADDR_CARP_GROUP       __IPADDR(0xe0000012)    /* 224.0.0.18 */
 229 #define INADDR_MAX_LOCAL_GROUP  __IPADDR(0xe00000ff)    /* 224.0.0.255 */
 230
 231 #define IN_LOOPBACKNET          127                     /* official! */
 232
 233 /*
 234  * Socket address, internet style.
 235  */
 236 struct sockaddr_in {
 237         uint8_t         sin_len;
 238         sa_family_t     sin_family;
 239         in_port_t       sin_port;
 240         struct in_addr  sin_addr;
 241         __int8_t        sin_zero[8];
 242 };
 243
 244 #define INET_ADDRSTRLEN                 16
 245
 246 /*
 247  * Structure used to describe IP options.
 248  * Used to store options internally, to pass them to a process,
 249  * or to restore options retrieved earlier.
 250  * The ip_dst is used for the first-hop gateway when using a source route
 251  * (this gets put into the header proper).
 252  */
 253 struct ip_opts {
 254         struct in_addr  ip_dst;         /* first hop, 0 w/o src rt */
 255 #if defined(__cplusplus)
 256         __int8_t        Ip_opts[40];    /* actually variable in size */
 257 #else
 258         __int8_t        ip_opts[40];    /* actually variable in size */
 259 #endif
 260 };
 261
 262 /*
 263  * Options for use with [gs]etsockopt at the IP level.
 264  * First word of comment is data type; bool is stored in int.
 265  */
 266 #define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */
 267 #define IP_HDRINCL              2    /* int; header is included with data */
 268 #define IP_TOS                  3    /* int; IP type of service and preced. */
 269 #define IP_TTL                  4    /* int; IP time to live */
 270 #define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */
 271 #define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */
 272 #define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */
 273 #define IP_RETOPTS              8    /* ip_opts; set/get IP options */
 274 #define IP_MULTICAST_IF         9    /* in_addr; set/get IP multicast i/f  */
 275 #define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */
 276 #define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */
 277 #define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */
 278 #define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */
 279 #define IP_PORTRANGE            19   /* int; range to use for ephemeral port */
 280 #define IP_RECVIF               20   /* bool; receive reception if w/dgram */
 281 #define IP_ERRORMTU             21   /* int; get MTU of last xmit = EMSGSIZE */
 282 #if 1 /*IPSEC*/
 283 #define IP_IPSEC_POLICY         22 /* struct; get/set security policy */
 284 #endif
 285
 286 /*
 287  * Defaults and limits for options
 288  */
 289 #define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */
 290 #define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */
 291 #define IP_MAX_MEMBERSHIPS      20      /* per socket; must fit in one mbuf */
 292
 293 /*
 294  * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
 295  */
 296 struct ip_mreq {
 297         struct  in_addr imr_multiaddr;  /* IP multicast address of group */
 298         struct  in_addr imr_interface;  /* local IP address of interface */
 299 };
 300
 301 /*
 302  * Argument for IP_PORTRANGE:
 303  * - which range to search when port is unspecified at bind() or connect()
 304  */
 305 #define IP_PORTRANGE_DEFAULT    0       /* default range */
 306 #define IP_PORTRANGE_HIGH       1       /* same as DEFAULT (FreeBSD compat) */
 307 #define IP_PORTRANGE_LOW        2       /* use privileged range */
 308
 309 #if defined(_NETBSD_SOURCE)
 310 /*
 311  * Definitions for inet sysctl operations.
 312  *
 313  * Third level is protocol number.
 314  * Fourth level is desired variable within that protocol.
 315  */
 316 #define IPPROTO_MAXID   (IPPROTO_AH + 1)        /* don't list to IPPROTO_MAX */
 317
 318 #define CTL_IPPROTO_NAMES { \
 319         { "ip", CTLTYPE_NODE }, \
 320         { "icmp", CTLTYPE_NODE }, \
 321         { "igmp", CTLTYPE_NODE }, \
 322         { "ggp", CTLTYPE_NODE }, \
 323         { 0, 0 }, \
 324         { 0, 0 }, \
 325         { "tcp", CTLTYPE_NODE }, \
 326         { 0, 0 }, \
 327         { "egp", CTLTYPE_NODE }, \
 328         { 0, 0 }, \
 329         { 0, 0 }, \
 330         { 0, 0 }, \
 331         { "pup", CTLTYPE_NODE }, \
 332         { 0, 0 }, \
 333         { 0, 0 }, \
 334         { 0, 0 }, \
 335         { 0, 0 }, \
 336         { "udp", CTLTYPE_NODE }, \
 337         { 0, 0 }, \
 338         { 0, 0 }, \
 339         { 0, 0 }, \
 340         { 0, 0 }, \
 341         { "idp", CTLTYPE_NODE }, \
 342         { 0, 0 }, \
 343         { 0, 0 }, \
 344         { 0, 0 }, \
 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         { "ipsec", CTLTYPE_NODE }, \
 371         { 0, 0 }, \
 372         { 0, 0 }, \
 373         { 0, 0 }, \
 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         { "pim", CTLTYPE_NODE }, \
 423 }
 424
 425 /*
 426  * Names for IP sysctl objects
 427  */
 428 #define IPCTL_FORWARDING        1       /* act as router */
 429 #define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */
 430 #define IPCTL_DEFTTL            3       /* default TTL */
 431 #ifdef notyet
 432 #define IPCTL_DEFMTU            4       /* default MTU */
 433 #endif
 434 #define IPCTL_FORWSRCRT         5       /* forward source-routed packets */
 435 #define IPCTL_DIRECTEDBCAST     6       /* default broadcast behavior */
 436 #define IPCTL_ALLOWSRCRT        7       /* allow/drop all source-routed pkts */
 437 #define IPCTL_SUBNETSARELOCAL   8       /* treat subnets as local addresses */
 438 #define IPCTL_MTUDISC           9       /* allow path MTU discovery */
 439 #define IPCTL_ANONPORTMIN      10       /* minimum ephemeral port */
 440 #define IPCTL_ANONPORTMAX      11       /* maximum ephemeral port */
 441 #define IPCTL_MTUDISCTIMEOUT   12       /* allow path MTU discovery */
 442 #define IPCTL_MAXFLOWS         13       /* maximum ip flows allowed */
 443 #define IPCTL_HOSTZEROBROADCAST 14      /* is host zero a broadcast addr? */
 444 #define IPCTL_GIF_TTL          15       /* default TTL for gif encap packet */
 445 #define IPCTL_LOWPORTMIN       16       /* minimum reserved port */
 446 #define IPCTL_LOWPORTMAX       17       /* maximum reserved port */
 447 #define IPCTL_MAXFRAGPACKETS   18       /* max packets reassembly queue */
 448 #define IPCTL_GRE_TTL          19       /* default TTL for gre encap packet */
 449 #define IPCTL_CHECKINTERFACE   20       /* drop pkts in from 'wrong' iface */
 450 #define IPCTL_IFQ              21       /* ipintrq node */
 451 #define IPCTL_RANDOMID         22       /* use random IP ids (if configured) */
 452 #define IPCTL_LOOPBACKCKSUM    23       /* do IP checksum on loopback */
 453 #define IPCTL_STATS             24      /* IP statistics */
 454 #define IPCTL_MAXID            25
 455
 456 #define IPCTL_NAMES { \
 457         { 0, 0 }, \
 458         { "forwarding", CTLTYPE_INT }, \
 459         { "redirect", CTLTYPE_INT }, \
 460         { "ttl", CTLTYPE_INT }, \
 461         { "mtu", CTLTYPE_INT }, \
 462         { "forwsrcrt", CTLTYPE_INT }, \
 463         { "directed-broadcast", CTLTYPE_INT }, \
 464         { "allowsrcrt", CTLTYPE_INT }, \
 465         { "subnetsarelocal", CTLTYPE_INT }, \
 466         { "mtudisc", CTLTYPE_INT }, \
 467         { "anonportmin", CTLTYPE_INT }, \
 468         { "anonportmax", CTLTYPE_INT }, \
 469         { "mtudisctimeout", CTLTYPE_INT }, \
 470         { "maxflows", CTLTYPE_INT }, \
 471         { "hostzerobroadcast", CTLTYPE_INT }, \
 472         { "gifttl", CTLTYPE_INT }, \
 473         { "lowportmin", CTLTYPE_INT }, \
 474         { "lowportmax", CTLTYPE_INT }, \
 475         { "maxfragpackets", CTLTYPE_INT }, \
 476         { "grettl", CTLTYPE_INT }, \
 477         { "checkinterface", CTLTYPE_INT }, \
 478         { "ifq", CTLTYPE_NODE }, \
 479         { "random_id", CTLTYPE_INT }, \
 480         { "do_loopback_cksum", CTLTYPE_INT }, \
 481         { "stats", CTLTYPE_STRUCT }, \
 482 }
 483 #endif /* _NETBSD_SOURCE */
 484
 485 /* INET6 stuff */
 486 #define __KAME_NETINET_IN_H_INCLUDED_
 487 #include <netinet6/in6.h>
 488 #undef __KAME_NETINET_IN_H_INCLUDED_
 489
 490 #ifdef _KERNEL
 491 /*
 492  * in_cksum_phdr:
 493  *
 494  *      Compute significant parts of the IPv4 checksum pseudo-header
 495  *      for use in a delayed TCP/UDP checksum calculation.
 496  *
 497  *      Args:
 498  *
 499  *              src             Source IP address
 500  *              dst             Destination IP address
 501  *              lenproto        htons(proto-hdr-len + proto-number)
 502  */
 503 static __inline u_int16_t __attribute__((__unused__))
 504 in_cksum_phdr(u_int32_t src, u_int32_t dst, u_int32_t lenproto)
 505 {
 506         u_int32_t sum;
 507
 508         sum = lenproto +
 509               (u_int16_t)(src >> 16) +
 510               (u_int16_t)(src /*& 0xffff*/) +
 511               (u_int16_t)(dst >> 16) +
 512               (u_int16_t)(dst /*& 0xffff*/);
 513
 514         sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);
 515
 516         if (sum > 0xffff)
 517                 sum -= 0xffff;
 518
 519         return (sum);
 520 }
 521
 522 /*
 523  * in_cksum_addword:
 524  *
 525  *      Add the two 16-bit network-order values, carry, and return.
 526  */
 527 static __inline u_int16_t __attribute__((__unused__))
 528 in_cksum_addword(u_int16_t a, u_int16_t b)
 529 {
 530         u_int32_t sum = a + b;
 531
 532         if (sum > 0xffff)
 533                 sum -= 0xffff;
 534
 535         return (sum);
 536 }
 537
 538 extern  struct in_addr zeroin_addr;
 539 extern  u_char  ip_protox[];
 540
 541 int     in_broadcast(struct in_addr, struct ifnet *);
 542 int     in_canforward(struct in_addr);
 543 int     in_cksum(struct mbuf *, int);
 544 int     in4_cksum(struct mbuf *, u_int8_t, int, int);
 545 void    in_delayed_cksum(struct mbuf *);
 546 int     in_localaddr(struct in_addr);
 547 void    in_socktrim(struct sockaddr_in *);
 548
 549 #define in_hosteq(s,t)  ((s).s_addr == (t).s_addr)
 550 #define in_nullhost(x)  ((x).s_addr == INADDR_ANY)
 551
 552 #define satosin(sa)     ((struct sockaddr_in *)(sa))
 553 #define sintosa(sin)    ((struct sockaddr *)(sin))
 554 #define ifatoia(ifa)    ((struct in_ifaddr *)(ifa))
 555 #endif /* _KERNEL */
 556
 557 #endif /* !_NETINET_IN_H_ */