include/netinet/in.h

   1 /* Copyright (C) 1991-2001, 2003, 2004, 2006, 2007, 2008
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _NETINET_IN_H
  20 #define _NETINET_IN_H   1
  21
  22 #include <features.h>
  23 #include <stdint.h>
  24 #include <sys/socket.h>
  25 #include <bits/types.h>
  26
  27
  28 __BEGIN_DECLS
  29
  30 /* Standard well-defined IP protocols.  */
  31 enum
  32   {
  33     IPPROTO_IP = 0,        /* Dummy protocol for TCP.  */
  34 #define IPPROTO_IP              IPPROTO_IP
  35     IPPROTO_HOPOPTS = 0,   /* IPv6 Hop-by-Hop options.  */
  36 #define IPPROTO_HOPOPTS         IPPROTO_HOPOPTS
  37     IPPROTO_ICMP = 1,      /* Internet Control Message Protocol.  */
  38 #define IPPROTO_ICMP            IPPROTO_ICMP
  39     IPPROTO_IGMP = 2,      /* Internet Group Management Protocol. */
  40 #define IPPROTO_IGMP            IPPROTO_IGMP
  41     IPPROTO_IPIP = 4,      /* IPIP tunnels (older KA9Q tunnels use 94).  */
  42 #define IPPROTO_IPIP            IPPROTO_IPIP
  43     IPPROTO_TCP = 6,       /* Transmission Control Protocol.  */
  44 #define IPPROTO_TCP             IPPROTO_TCP
  45     IPPROTO_EGP = 8,       /* Exterior Gateway Protocol.  */
  46 #define IPPROTO_EGP             IPPROTO_EGP
  47     IPPROTO_PUP = 12,      /* PUP protocol.  */
  48 #define IPPROTO_PUP             IPPROTO_PUP
  49     IPPROTO_UDP = 17,      /* User Datagram Protocol.  */
  50 #define IPPROTO_UDP             IPPROTO_UDP
  51     IPPROTO_IDP = 22,      /* XNS IDP protocol.  */
  52 #define IPPROTO_IDP             IPPROTO_IDP
  53     IPPROTO_TP = 29,       /* SO Transport Protocol Class 4.  */
  54 #define IPPROTO_TP              IPPROTO_TP
  55     IPPROTO_DCCP = 33,     /* Datagram Congestion Control Protocol.  */
  56 #define IPPROTO_DCCP            IPPROTO_DCCP
  57     IPPROTO_IPV6 = 41,     /* IPv6 header.  */
  58 #define IPPROTO_IPV6            IPPROTO_IPV6
  59     IPPROTO_ROUTING = 43,  /* IPv6 routing header.  */
  60 #define IPPROTO_ROUTING         IPPROTO_ROUTING
  61     IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header.  */
  62 #define IPPROTO_FRAGMENT        IPPROTO_FRAGMENT
  63     IPPROTO_RSVP = 46,     /* Reservation Protocol.  */
  64 #define IPPROTO_RSVP            IPPROTO_RSVP
  65     IPPROTO_GRE = 47,      /* General Routing Encapsulation.  */
  66 #define IPPROTO_GRE             IPPROTO_GRE
  67     IPPROTO_ESP = 50,      /* encapsulating security payload.  */
  68 #define IPPROTO_ESP             IPPROTO_ESP
  69     IPPROTO_AH = 51,       /* authentication header.  */
  70 #define IPPROTO_AH              IPPROTO_AH
  71     IPPROTO_ICMPV6 = 58,   /* ICMPv6.  */
  72 #define IPPROTO_ICMPV6          IPPROTO_ICMPV6
  73     IPPROTO_NONE = 59,     /* IPv6 no next header.  */
  74 #define IPPROTO_NONE            IPPROTO_NONE
  75     IPPROTO_DSTOPTS = 60,  /* IPv6 destination options.  */
  76 #define IPPROTO_DSTOPTS         IPPROTO_DSTOPTS
  77     IPPROTO_MTP = 92,      /* Multicast Transport Protocol.  */
  78 #define IPPROTO_MTP             IPPROTO_MTP
  79     IPPROTO_ENCAP = 98,    /* Encapsulation Header.  */
  80 #define IPPROTO_ENCAP           IPPROTO_ENCAP
  81     IPPROTO_PIM = 103,     /* Protocol Independent Multicast.  */
  82 #define IPPROTO_PIM             IPPROTO_PIM
  83     IPPROTO_COMP = 108,    /* Compression Header Protocol.  */
  84 #define IPPROTO_COMP            IPPROTO_COMP
  85     IPPROTO_SCTP = 132,    /* Stream Control Transmission Protocol.  */
  86 #define IPPROTO_SCTP            IPPROTO_SCTP
  87     IPPROTO_MH = 135,      /* IPv6 mobility header.  */
  88 #define IPPROTO_MH              IPPROTO_MH
  89     IPPROTO_UDPLITE = 136, /* UDP-Lite protocol.  */
  90 #define IPPROTO_UDPLITE         IPPROTO_UDPLITE
  91     IPPROTO_RAW = 255,     /* Raw IP packets.  */
  92 #define IPPROTO_RAW             IPPROTO_RAW
  93     IPPROTO_MAX
  94   };
  95
  96
  97 /* Type to represent a port.  */
  98 typedef uint16_t in_port_t;
  99
 100 /* Standard well-known ports.  */
 101 enum
 102   {
 103     IPPORT_ECHO = 7,            /* Echo service.  */
 104     IPPORT_DISCARD = 9,         /* Discard transmissions service.  */
 105     IPPORT_SYSTAT = 11,         /* System status service.  */
 106     IPPORT_DAYTIME = 13,        /* Time of day service.  */
 107     IPPORT_NETSTAT = 15,        /* Network status service.  */
 108     IPPORT_FTP = 21,            /* File Transfer Protocol.  */
 109     IPPORT_TELNET = 23,         /* Telnet protocol.  */
 110     IPPORT_SMTP = 25,           /* Simple Mail Transfer Protocol.  */
 111     IPPORT_TIMESERVER = 37,     /* Timeserver service.  */
 112     IPPORT_NAMESERVER = 42,     /* Domain Name Service.  */
 113     IPPORT_WHOIS = 43,          /* Internet Whois service.  */
 114     IPPORT_MTP = 57,
 115
 116     IPPORT_TFTP = 69,           /* Trivial File Transfer Protocol.  */
 117     IPPORT_RJE = 77,
 118     IPPORT_FINGER = 79,         /* Finger service.  */
 119     IPPORT_TTYLINK = 87,
 120     IPPORT_SUPDUP = 95,         /* SUPDUP protocol.  */
 121
 122
 123     IPPORT_EXECSERVER = 512,    /* execd service.  */
 124     IPPORT_LOGINSERVER = 513,   /* rlogind service.  */
 125     IPPORT_CMDSERVER = 514,
 126     IPPORT_EFSSERVER = 520,
 127
 128     /* UDP ports.  */
 129     IPPORT_BIFFUDP = 512,
 130     IPPORT_WHOSERVER = 513,
 131     IPPORT_ROUTESERVER = 520,
 132
 133     /* Ports less than this value are reserved for privileged processes.  */
 134     IPPORT_RESERVED = 1024,
 135
 136     /* Ports greater this value are reserved for (non-privileged) servers.  */
 137     IPPORT_USERRESERVED = 5000
 138   };
 139
 140
 141 /* Internet address.  */
 142 typedef uint32_t in_addr_t;
 143 struct in_addr
 144   {
 145     in_addr_t s_addr;
 146   };
 147
 148
 149 /* Definitions of the bits in an Internet address integer.
 150
 151    On subnets, host and network parts are found according to
 152    the subnet mask, not these masks.  */
 153
 154 #define IN_CLASSA(a)            ((((in_addr_t)(a)) & 0x80000000) == 0)
 155 #define IN_CLASSA_NET           0xff000000
 156 #define IN_CLASSA_NSHIFT        24
 157 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
 158 #define IN_CLASSA_MAX           128
 159
 160 #define IN_CLASSB(a)            ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000)
 161 #define IN_CLASSB_NET           0xffff0000
 162 #define IN_CLASSB_NSHIFT        16
 163 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
 164 #define IN_CLASSB_MAX           65536
 165
 166 #define IN_CLASSC(a)            ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000)
 167 #define IN_CLASSC_NET           0xffffff00
 168 #define IN_CLASSC_NSHIFT        8
 169 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
 170
 171 #define IN_CLASSD(a)            ((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000)
 172 #define IN_MULTICAST(a)         IN_CLASSD(a)
 173
 174 #define IN_EXPERIMENTAL(a)      ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000)
 175 #define IN_BADCLASS(a)          ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000)
 176
 177 /* Address to accept any incoming messages.  */
 178 #define INADDR_ANY              ((in_addr_t) 0x00000000)
 179 /* Address to send to all hosts.  */
 180 #define INADDR_BROADCAST        ((in_addr_t) 0xffffffff)
 181 /* Address indicating an error return.  */
 182 #define INADDR_NONE             ((in_addr_t) 0xffffffff)
 183
 184 /* Network number for local host loopback.  */
 185 #define IN_LOOPBACKNET          127
 186 /* Address to loopback in software to local host.  */
 187 #ifndef INADDR_LOOPBACK
 188 # define INADDR_LOOPBACK        ((in_addr_t) 0x7f000001) /* Inet 127.0.0.1.  */
 189 #endif
 190
 191 /* Defines for Multicast INADDR.  */
 192 #define INADDR_UNSPEC_GROUP     ((in_addr_t) 0xe0000000) /* 224.0.0.0 */
 193 #define INADDR_ALLHOSTS_GROUP   ((in_addr_t) 0xe0000001) /* 224.0.0.1 */
 194 #define INADDR_ALLRTRS_GROUP    ((in_addr_t) 0xe0000002) /* 224.0.0.2 */
 195 #define INADDR_MAX_LOCAL_GROUP  ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */
 196
 197
 198 #if defined __UCLIBC_HAS_IPV6__ || !defined __UCLIBC_STRICT_HEADERS__
 199 /* IPv6 address */
 200 struct in6_addr
 201   {
 202     union
 203       {
 204         uint8_t __u6_addr8[16];
 205 #if defined __USE_MISC || defined __USE_GNU
 206         uint16_t __u6_addr16[8];
 207         uint32_t __u6_addr32[4];
 208 #endif
 209       } __in6_u;
 210 #define s6_addr                 __in6_u.__u6_addr8
 211 #if defined __USE_MISC || defined __USE_GNU
 212 # define s6_addr16              __in6_u.__u6_addr16
 213 # define s6_addr32              __in6_u.__u6_addr32
 214 #endif
 215   };
 216
 217 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
 218 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
 219
 220 #define INET6_ADDRSTRLEN 46
 221 #endif
 222
 223 #ifdef __UCLIBC_HAS_IPV6__
 224 extern const struct in6_addr in6addr_any;        /* :: */
 225 extern const struct in6_addr in6addr_loopback;   /* ::1 */
 226 libc_hidden_proto(in6addr_loopback)
 227 #endif
 228
 229 #define INET_ADDRSTRLEN 16
 230
 231
 232 #if 1 /*def __UCLIBC_HAS_IPV4__*/
 233 /* Structure describing an Internet socket address.  */
 234 struct sockaddr_in
 235   {
 236     __SOCKADDR_COMMON (sin_);
 237     in_port_t sin_port;                 /* Port number.  */
 238     struct in_addr sin_addr;            /* Internet address.  */
 239
 240     /* Pad to size of `struct sockaddr'.  */
 241     unsigned char sin_zero[sizeof (struct sockaddr) -
 242                            __SOCKADDR_COMMON_SIZE -
 243                            sizeof (in_port_t) -
 244                            sizeof (struct in_addr)];
 245   };
 246 #endif
 247
 248 #if defined __UCLIBC_HAS_IPV6__ || !defined __UCLIBC_STRICT_HEADERS__
 249 /* Ditto, for IPv6.  */
 250 struct sockaddr_in6
 251   {
 252     __SOCKADDR_COMMON (sin6_);
 253     in_port_t sin6_port;        /* Transport layer port # */
 254     uint32_t sin6_flowinfo;     /* IPv6 flow information */
 255     struct in6_addr sin6_addr;  /* IPv6 address */
 256     uint32_t sin6_scope_id;     /* IPv6 scope-id */
 257   };
 258 #endif
 259
 260
 261 #if defined __USE_MISC || defined __USE_GNU
 262 /* IPv4 multicast request.  */
 263 struct ip_mreq
 264   {
 265     /* IP multicast address of group.  */
 266     struct in_addr imr_multiaddr;
 267
 268     /* Local IP address of interface.  */
 269     struct in_addr imr_interface;
 270   };
 271
 272 struct ip_mreq_source
 273   {
 274     /* IP multicast address of group.  */
 275     struct in_addr imr_multiaddr;
 276
 277     /* IP address of source.  */
 278     struct in_addr imr_interface;
 279
 280     /* IP address of interface.  */
 281     struct in_addr imr_sourceaddr;
 282   };
 283 #endif
 284
 285
 286 #if defined __UCLIBC_HAS_IPV6__ || !defined __UCLIBC_STRICT_HEADERS__
 287 /* Likewise, for IPv6.  */
 288 struct ipv6_mreq
 289   {
 290     /* IPv6 multicast address of group */
 291     struct in6_addr ipv6mr_multiaddr;
 292
 293     /* local interface */
 294     unsigned int ipv6mr_interface;
 295   };
 296 #endif
 297
 298
 299 #if defined __USE_MISC || defined __USE_GNU
 300 /* Multicast group request.  */
 301 struct group_req
 302   {
 303     /* Interface index.  */
 304     uint32_t gr_interface;
 305
 306     /* Group address.  */
 307     struct sockaddr_storage gr_group;
 308   };
 309
 310 struct group_source_req
 311   {
 312     /* Interface index.  */
 313     uint32_t gsr_interface;
 314
 315     /* Group address.  */
 316     struct sockaddr_storage gsr_group;
 317
 318     /* Source address.  */
 319     struct sockaddr_storage gsr_source;
 320   };
 321
 322
 323 /* Full-state filter operations.  */
 324 struct ip_msfilter
 325   {
 326     /* IP multicast address of group.  */
 327     struct in_addr imsf_multiaddr;
 328
 329     /* Local IP address of interface.  */
 330     struct in_addr imsf_interface;
 331
 332     /* Filter mode.  */
 333     uint32_t imsf_fmode;
 334
 335     /* Number of source addresses.  */
 336     uint32_t imsf_numsrc;
 337     /* Source addresses.  */
 338     struct in_addr imsf_slist[1];
 339   };
 340
 341 #define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \
 342                                   - sizeof (struct in_addr)                   \
 343                                   + (numsrc) * sizeof (struct in_addr))
 344
 345 struct group_filter
 346   {
 347     /* Interface index.  */
 348     uint32_t gf_interface;
 349
 350     /* Group address.  */
 351     struct sockaddr_storage gf_group;
 352
 353     /* Filter mode.  */
 354     uint32_t gf_fmode;
 355
 356     /* Number of source addresses.  */
 357     uint32_t gf_numsrc;
 358     /* Source addresses.  */
 359     struct sockaddr_storage gf_slist[1];
 360 };
 361
 362 #define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \
 363                                    - sizeof (struct sockaddr_storage)         \
 364                                    + ((numsrc)                                \
 365                                       * sizeof (struct sockaddr_storage)))
 366 #endif
 367
 368
 369 /* Get system-specific definitions.  */
 370 #include <bits/in.h>
 371
 372 /* Functions to convert between host and network byte order.
 373
 374    Please note that these functions normally take `unsigned long int' or
 375    `unsigned short int' values as arguments and also return them.  But
 376    this was a short-sighted decision since on different systems the types
 377    may have different representations but the values are always the same.  */
 378
 379 extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));
 380 libc_hidden_proto(ntohl)
 381 extern uint16_t ntohs (uint16_t __netshort)
 382      __THROW __attribute__ ((__const__));
 383 libc_hidden_proto(ntohs)
 384 extern uint32_t htonl (uint32_t __hostlong)
 385      __THROW __attribute__ ((__const__));
 386 libc_hidden_proto(htonl)
 387 extern uint16_t htons (uint16_t __hostshort)
 388      __THROW __attribute__ ((__const__));
 389 libc_hidden_proto(htons)
 390
 391 #include <endian.h>
 392
 393 /* Get machine dependent optimized versions of byte swapping functions.  */
 394 #include <bits/byteswap.h>
 395
 396 #ifdef __OPTIMIZE__
 397 /* We can optimize calls to the conversion functions.  Either nothing has
 398    to be done or we are using directly the byte-swapping functions which
 399    often can be inlined.  */
 400 # if __BYTE_ORDER == __BIG_ENDIAN
 401 /* The host byte order is the same as network byte order,
 402    so these functions are all just identity.  */
 403 # define ntohl(x)       (x)
 404 # define ntohs(x)       (x)
 405 # define htonl(x)       (x)
 406 # define htons(x)       (x)
 407 # else
 408 #  if __BYTE_ORDER == __LITTLE_ENDIAN
 409 #   define ntohl(x)     __bswap_32 (x)
 410 #   define ntohs(x)     __bswap_16 (x)
 411 #   define htonl(x)     __bswap_32 (x)
 412 #   define htons(x)     __bswap_16 (x)
 413 #  endif
 414 # endif
 415 #endif
 416
 417 #if defined __UCLIBC_HAS_IPV6__ || !defined __UCLIBC_STRICT_HEADERS__
 418 #define IN6_IS_ADDR_UNSPECIFIED(a) \
 419         (((const uint32_t *) (a))[0] == 0                                     \
 420          && ((const uint32_t *) (a))[1] == 0                                  \
 421          && ((const uint32_t *) (a))[2] == 0                                  \
 422          && ((const uint32_t *) (a))[3] == 0)
 423
 424 #define IN6_IS_ADDR_LOOPBACK(a) \
 425         (((const uint32_t *) (a))[0] == 0                                     \
 426          && ((const uint32_t *) (a))[1] == 0                                  \
 427          && ((const uint32_t *) (a))[2] == 0                                  \
 428          && ((const uint32_t *) (a))[3] == htonl (1))
 429
 430 #define IN6_IS_ADDR_MULTICAST(a) (((const uint8_t *) (a))[0] == 0xff)
 431
 432 #define IN6_IS_ADDR_LINKLOCAL(a) \
 433         ((((const uint32_t *) (a))[0] & htonl (0xffc00000))                   \
 434          == htonl (0xfe800000))
 435
 436 #define IN6_IS_ADDR_SITELOCAL(a) \
 437         ((((const uint32_t *) (a))[0] & htonl (0xffc00000))                   \
 438          == htonl (0xfec00000))
 439
 440 #define IN6_IS_ADDR_V4MAPPED(a) \
 441         ((((const uint32_t *) (a))[0] == 0)                                   \
 442          && (((const uint32_t *) (a))[1] == 0)                        \
 443          && (((const uint32_t *) (a))[2] == htonl (0xffff)))
 444
 445 #define IN6_IS_ADDR_V4COMPAT(a) \
 446         ((((const uint32_t *) (a))[0] == 0)                                   \
 447          && (((const uint32_t *) (a))[1] == 0)                        \
 448          && (((const uint32_t *) (a))[2] == 0)                        \
 449          && (ntohl (((const uint32_t *) (a))[3]) > 1))
 450
 451 #define IN6_ARE_ADDR_EQUAL(a,b) \
 452         ((((const uint32_t *) (a))[0] == ((const uint32_t *) (b))[0])     \
 453          && (((const uint32_t *) (a))[1] == ((const uint32_t *) (b))[1])  \
 454          && (((const uint32_t *) (a))[2] == ((const uint32_t *) (b))[2])  \
 455          && (((const uint32_t *) (a))[3] == ((const uint32_t *) (b))[3]))
 456 #endif
 457
 458 #if defined __USE_MISC || defined __USE_GNU
 459 /* Bind socket to a privileged IP port.  */
 460 extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW;
 461 libc_hidden_proto(bindresvport)
 462
 463 # if 0 /*def __UCLIBC_HAS_IPV6__*/
 464 /* The IPv6 version of this function.  */
 465 extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in)
 466      __THROW;
 467 # endif
 468 #endif
 469
 470
 471 #if defined __UCLIBC_HAS_IPV6__ || !defined __UCLIBC_STRICT_HEADERS__
 472 #define IN6_IS_ADDR_MC_NODELOCAL(a) \
 473         (IN6_IS_ADDR_MULTICAST(a)                                             \
 474          && ((((const uint8_t *) (a))[1] & 0xf) == 0x1))
 475
 476 #define IN6_IS_ADDR_MC_LINKLOCAL(a) \
 477         (IN6_IS_ADDR_MULTICAST(a)                                             \
 478          && ((((const uint8_t *) (a))[1] & 0xf) == 0x2))
 479
 480 #define IN6_IS_ADDR_MC_SITELOCAL(a) \
 481         (IN6_IS_ADDR_MULTICAST(a)                                             \
 482          && ((((const uint8_t *) (a))[1] & 0xf) == 0x5))
 483
 484 #define IN6_IS_ADDR_MC_ORGLOCAL(a) \
 485         (IN6_IS_ADDR_MULTICAST(a)                                             \
 486          && ((((const uint8_t *) (a))[1] & 0xf) == 0x8))
 487
 488 #define IN6_IS_ADDR_MC_GLOBAL(a) \
 489         (IN6_IS_ADDR_MULTICAST(a)                                             \
 490          && ((((const uint8_t *) (a))[1] & 0xf) == 0xe))
 491 #endif
 492
 493
 494 #ifdef __USE_GNU
 495 # if defined __UCLIBC_HAS_IPV6__ || !defined __UCLIBC_STRICT_HEADERS__
 496 /* IPv6 packet information.  */
 497 struct in6_pktinfo
 498   {
 499     struct in6_addr ipi6_addr;  /* src/dst IPv6 address */
 500     unsigned int ipi6_ifindex;  /* send/recv interface index */
 501   };
 502
 503 /* IPv6 MTU information.  */
 504 struct ip6_mtuinfo
 505   {
 506     struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */
 507     uint32_t ip6m_mtu;             /* path MTU in host byte order */
 508   };
 509
 510
 511 #  if 0
 512 /* Obsolete hop-by-hop and Destination Options Processing (RFC 2292).  */
 513 extern int inet6_option_space (int __nbytes)
 514      __THROW __attribute_deprecated__;
 515 extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp,
 516                               int __type) __THROW __attribute_deprecated__;
 517 extern int inet6_option_append (struct cmsghdr *__cmsg,
 518                                 const uint8_t *__typep, int __multx,
 519                                 int __plusy) __THROW __attribute_deprecated__;
 520 extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen,
 521                                     int __multx, int __plusy)
 522      __THROW __attribute_deprecated__;
 523 extern int inet6_option_next (const struct cmsghdr *__cmsg,
 524                               uint8_t **__tptrp)
 525      __THROW __attribute_deprecated__;
 526 extern int inet6_option_find (const struct cmsghdr *__cmsg,
 527                               uint8_t **__tptrp, int __type)
 528      __THROW __attribute_deprecated__;
 529
 530
 531 /* Hop-by-Hop and Destination Options Processing (RFC 3542).  */
 532 extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW;
 533 extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset,
 534                              uint8_t __type, socklen_t __len, uint8_t __align,
 535                              void **__databufp) __THROW;
 536 extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset)
 537      __THROW;
 538 extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val,
 539                               socklen_t __vallen) __THROW;
 540 extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset,
 541                            uint8_t *__typep, socklen_t *__lenp,
 542                            void **__databufp) __THROW;
 543 extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset,
 544                            uint8_t __type, socklen_t *__lenp,
 545                            void **__databufp) __THROW;
 546 extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val,
 547                               socklen_t __vallen) __THROW;
 548
 549
 550 /* Routing Header Option (RFC 3542).  */
 551 extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;
 552 extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,
 553                              int __segments) __THROW;
 554 extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW;
 555 extern int inet6_rth_reverse (const void *__in, void *__out) __THROW;
 556 extern int inet6_rth_segments (const void *__bp) __THROW;
 557 extern struct in6_addr *inet6_rth_getaddr (const void *__bp, int __index)
 558      __THROW;
 559 #  endif
 560 # endif
 561
 562
 563 # if 0
 564 /* Multicast source filter support.  */
 565
 566 /* Get IPv4 source filter.  */
 567 extern int getipv4sourcefilter (int __s, struct in_addr __interface_addr,
 568                                 struct in_addr __group, uint32_t *__fmode,
 569                                 uint32_t *__numsrc, struct in_addr *__slist)
 570      __THROW;
 571
 572 /* Set IPv4 source filter.  */
 573 extern int setipv4sourcefilter (int __s, struct in_addr __interface_addr,
 574                                 struct in_addr __group, uint32_t __fmode,
 575                                 uint32_t __numsrc,
 576                                 const struct in_addr *__slist)
 577      __THROW;
 578
 579
 580 /* Get source filter.  */
 581 extern int getsourcefilter (int __s, uint32_t __interface_addr,
 582                             const struct sockaddr *__group,
 583                             socklen_t __grouplen, uint32_t *__fmode,
 584                             uint32_t *__numsrc,
 585                             struct sockaddr_storage *__slist) __THROW;
 586
 587 /* Set source filter.  */
 588 extern int setsourcefilter (int __s, uint32_t __interface_addr,
 589                             const struct sockaddr *__group,
 590                             socklen_t __grouplen, uint32_t __fmode,
 591                             uint32_t __numsrc,
 592                             const struct sockaddr_storage *__slist) __THROW;
 593 # endif
 594 #endif  /* use GNU */
 595
 596 __END_DECLS
 597
 598 #endif  /* netinet/in.h */