1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _NETINET_IN_H 19 #define _NETINET_IN_H 1 20 21 #include <features.h> 22 #include <bits/stdint-uintn.h> 23 #include <sys/socket.h> 24 #include <bits/types.h> 25 26 27 __BEGIN_DECLS 28 29 /* Internet address. */ 30 typedef uint32_t in_addr_t; 31 struct in_addr 32 { 33 in_addr_t s_addr; 34 }; 35 36 /* Get system-specific definitions. */ 37 #include <bits/in.h> 38 39 /* Standard well-defined IP protocols. */ 40 enum 41 { 42 IPPROTO_IP = 0, /* Dummy protocol for TCP. */ 43 #define IPPROTO_IP IPPROTO_IP 44 IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */ 45 #define IPPROTO_ICMP IPPROTO_ICMP 46 IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */ 47 #define IPPROTO_IGMP IPPROTO_IGMP 48 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */ 49 #define IPPROTO_IPIP IPPROTO_IPIP 50 IPPROTO_TCP = 6, /* Transmission Control Protocol. */ 51 #define IPPROTO_TCP IPPROTO_TCP 52 IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */ 53 #define IPPROTO_EGP IPPROTO_EGP 54 IPPROTO_PUP = 12, /* PUP protocol. */ 55 #define IPPROTO_PUP IPPROTO_PUP 56 IPPROTO_UDP = 17, /* User Datagram Protocol. */ 57 #define IPPROTO_UDP IPPROTO_UDP 58 IPPROTO_IDP = 22, /* XNS IDP protocol. */ 59 #define IPPROTO_IDP IPPROTO_IDP 60 IPPROTO_TP = 29, /* SO Transport Protocol Class 4. */ 61 #define IPPROTO_TP IPPROTO_TP 62 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol. */ 63 #define IPPROTO_DCCP IPPROTO_DCCP 64 IPPROTO_IPV6 = 41, /* IPv6 header. */ 65 #define IPPROTO_IPV6 IPPROTO_IPV6 66 IPPROTO_RSVP = 46, /* Reservation Protocol. */ 67 #define IPPROTO_RSVP IPPROTO_RSVP 68 IPPROTO_GRE = 47, /* General Routing Encapsulation. */ 69 #define IPPROTO_GRE IPPROTO_GRE 70 IPPROTO_ESP = 50, /* encapsulating security payload. */ 71 #define IPPROTO_ESP IPPROTO_ESP 72 IPPROTO_AH = 51, /* authentication header. */ 73 #define IPPROTO_AH IPPROTO_AH 74 IPPROTO_MTP = 92, /* Multicast Transport Protocol. */ 75 #define IPPROTO_MTP IPPROTO_MTP 76 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET. */ 77 #define IPPROTO_BEETPH IPPROTO_BEETPH 78 IPPROTO_ENCAP = 98, /* Encapsulation Header. */ 79 #define IPPROTO_ENCAP IPPROTO_ENCAP 80 IPPROTO_PIM = 103, /* Protocol Independent Multicast. */ 81 #define IPPROTO_PIM IPPROTO_PIM 82 IPPROTO_COMP = 108, /* Compression Header Protocol. */ 83 #define IPPROTO_COMP IPPROTO_COMP 84 IPPROTO_SCTP = 132, /* Stream Control Transmission Protocol. */ 85 #define IPPROTO_SCTP IPPROTO_SCTP 86 IPPROTO_UDPLITE = 136, /* UDP-Lite protocol. */ 87 #define IPPROTO_UDPLITE IPPROTO_UDPLITE 88 IPPROTO_MPLS = 137, /* MPLS in IP. */ 89 #define IPPROTO_MPLS IPPROTO_MPLS 90 IPPROTO_ETHERNET = 143, /* Ethernet-within-IPv6 Encapsulation. */ 91 #define IPPROTO_ETHERNET IPPROTO_ETHERNET 92 IPPROTO_RAW = 255, /* Raw IP packets. */ 93 #define IPPROTO_RAW IPPROTO_RAW 94 IPPROTO_MPTCP = 262, /* Multipath TCP connection. */ 95 #define IPPROTO_MPTCP IPPROTO_MPTCP 96 IPPROTO_MAX 97 }; 98 99 /* If __USE_KERNEL_IPV6_DEFS is 1 then the user has included the kernel 100 network headers first and we should use those ABI-identical definitions 101 instead of our own, otherwise 0. */ 102 #if !__USE_KERNEL_IPV6_DEFS 103 enum 104 { 105 IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */ 106 #define IPPROTO_HOPOPTS IPPROTO_HOPOPTS 107 IPPROTO_ROUTING = 43, /* IPv6 routing header. */ 108 #define IPPROTO_ROUTING IPPROTO_ROUTING 109 IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header. */ 110 #define IPPROTO_FRAGMENT IPPROTO_FRAGMENT 111 IPPROTO_ICMPV6 = 58, /* ICMPv6. */ 112 #define IPPROTO_ICMPV6 IPPROTO_ICMPV6 113 IPPROTO_NONE = 59, /* IPv6 no next header. */ 114 #define IPPROTO_NONE IPPROTO_NONE 115 IPPROTO_DSTOPTS = 60, /* IPv6 destination options. */ 116 #define IPPROTO_DSTOPTS IPPROTO_DSTOPTS 117 IPPROTO_MH = 135 /* IPv6 mobility header. */ 118 #define IPPROTO_MH IPPROTO_MH 119 }; 120 #endif /* !__USE_KERNEL_IPV6_DEFS */ 121 122 /* Type to represent a port. */ 123 typedef uint16_t in_port_t; 124 125 /* Standard well-known ports. */ 126 enum 127 { 128 IPPORT_ECHO = 7, /* Echo service. */ 129 IPPORT_DISCARD = 9, /* Discard transmissions service. */ 130 IPPORT_SYSTAT = 11, /* System status service. */ 131 IPPORT_DAYTIME = 13, /* Time of day service. */ 132 IPPORT_NETSTAT = 15, /* Network status service. */ 133 IPPORT_FTP = 21, /* File Transfer Protocol. */ 134 IPPORT_TELNET = 23, /* Telnet protocol. */ 135 IPPORT_SMTP = 25, /* Simple Mail Transfer Protocol. */ 136 IPPORT_TIMESERVER = 37, /* Timeserver service. */ 137 IPPORT_NAMESERVER = 42, /* Domain Name Service. */ 138 IPPORT_WHOIS = 43, /* Internet Whois service. */ 139 IPPORT_MTP = 57, 140 141 IPPORT_TFTP = 69, /* Trivial File Transfer Protocol. */ 142 IPPORT_RJE = 77, 143 IPPORT_FINGER = 79, /* Finger service. */ 144 IPPORT_TTYLINK = 87, 145 IPPORT_SUPDUP = 95, /* SUPDUP protocol. */ 146 147 148 IPPORT_EXECSERVER = 512, /* execd service. */ 149 IPPORT_LOGINSERVER = 513, /* rlogind service. */ 150 IPPORT_CMDSERVER = 514, 151 IPPORT_EFSSERVER = 520, 152 153 /* UDP ports. */ 154 IPPORT_BIFFUDP = 512, 155 IPPORT_WHOSERVER = 513, 156 IPPORT_ROUTESERVER = 520, 157 158 /* Ports less than this value are reserved for privileged processes. */ 159 IPPORT_RESERVED = 1024, 160 161 /* Ports greater this value are reserved for (non-privileged) servers. */ 162 IPPORT_USERRESERVED = 5000 163 }; 164 165 /* Definitions of the bits in an Internet address integer. 166 167 On subnets, host and network parts are found according to 168 the subnet mask, not these masks. */ 169 170 #define IN_CLASSA(a) ((((in_addr_t)(a)) & 0x80000000) == 0) 171 #define IN_CLASSA_NET 0xff000000 172 #define IN_CLASSA_NSHIFT 24 173 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 174 #define IN_CLASSA_MAX 128 175 176 #define IN_CLASSB(a) ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000) 177 #define IN_CLASSB_NET 0xffff0000 178 #define IN_CLASSB_NSHIFT 16 179 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 180 #define IN_CLASSB_MAX 65536 181 182 #define IN_CLASSC(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000) 183 #define IN_CLASSC_NET 0xffffff00 184 #define IN_CLASSC_NSHIFT 8 185 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 186 187 #define IN_CLASSD(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000) 188 #define IN_MULTICAST(a) IN_CLASSD(a) 189 190 #define IN_EXPERIMENTAL(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000) 191 #define IN_BADCLASS(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000) 192 193 /* Address to accept any incoming messages. */ 194 #define INADDR_ANY ((in_addr_t) 0x00000000) 195 /* Address to send to all hosts. */ 196 #define INADDR_BROADCAST ((in_addr_t) 0xffffffff) 197 /* Address indicating an error return. */ 198 #define INADDR_NONE ((in_addr_t) 0xffffffff) 199 /* Dummy address for source of ICMPv6 errors converted to IPv4 (RFC 200 7600). */ 201 #define INADDR_DUMMY ((in_addr_t) 0xc0000008) 202 203 /* Network number for local host loopback. */ 204 #define IN_LOOPBACKNET 127 205 /* Address to loopback in software to local host. */ 206 #ifndef INADDR_LOOPBACK 207 # define INADDR_LOOPBACK ((in_addr_t) 0x7f000001) /* Inet 127.0.0.1. */ 208 #endif 209 210 /* Defines for Multicast INADDR. */ 211 #define INADDR_UNSPEC_GROUP ((in_addr_t) 0xe0000000) /* 224.0.0.0 */ 212 #define INADDR_ALLHOSTS_GROUP ((in_addr_t) 0xe0000001) /* 224.0.0.1 */ 213 #define INADDR_ALLRTRS_GROUP ((in_addr_t) 0xe0000002) /* 224.0.0.2 */ 214 #define INADDR_ALLSNOOPERS_GROUP ((in_addr_t) 0xe000006a) /* 224.0.0.106 */ 215 #define INADDR_MAX_LOCAL_GROUP ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */ 216 217 #if !__USE_KERNEL_IPV6_DEFS 218 /* IPv6 address */ 219 struct in6_addr 220 { 221 union 222 { 223 uint8_t __u6_addr8[16]; 224 uint16_t __u6_addr16[8]; 225 uint32_t __u6_addr32[4]; 226 } __in6_u; 227 #define s6_addr __in6_u.__u6_addr8 228 #ifdef __USE_MISC 229 # define s6_addr16 __in6_u.__u6_addr16 230 # define s6_addr32 __in6_u.__u6_addr32 231 #endif 232 }; 233 #endif /* !__USE_KERNEL_IPV6_DEFS */ 234 235 extern const struct in6_addr in6addr_any; /* :: */ 236 extern const struct in6_addr in6addr_loopback; /* ::1 */ 237 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 238 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 239 240 #define INET_ADDRSTRLEN 16 241 #define INET6_ADDRSTRLEN 46 242 243 244 /* Structure describing an Internet socket address. */ 245 struct sockaddr_in 246 { 247 __SOCKADDR_COMMON (sin_); 248 in_port_t sin_port; /* Port number. */ 249 struct in_addr sin_addr; /* Internet address. */ 250 251 /* Pad to size of `struct sockaddr'. */ 252 unsigned char sin_zero[sizeof (struct sockaddr) 253 - __SOCKADDR_COMMON_SIZE 254 - sizeof (in_port_t) 255 - sizeof (struct in_addr)]; 256 }; 257 258 #if !__USE_KERNEL_IPV6_DEFS 259 /* Ditto, for IPv6. */ 260 struct sockaddr_in6 261 { 262 __SOCKADDR_COMMON (sin6_); 263 in_port_t sin6_port; /* Transport layer port # */ 264 uint32_t sin6_flowinfo; /* IPv6 flow information */ 265 struct in6_addr sin6_addr; /* IPv6 address */ 266 uint32_t sin6_scope_id; /* IPv6 scope-id */ 267 }; 268 #endif /* !__USE_KERNEL_IPV6_DEFS */ 269 270 #ifdef __USE_MISC 271 /* IPv4 multicast request. */ 272 struct ip_mreq 273 { 274 /* IP multicast address of group. */ 275 struct in_addr imr_multiaddr; 276 277 /* Local IP address of interface. */ 278 struct in_addr imr_interface; 279 }; 280 281 struct ip_mreq_source 282 { 283 /* IP multicast address of group. */ 284 struct in_addr imr_multiaddr; 285 286 /* IP address of interface. */ 287 struct in_addr imr_interface; 288 289 /* IP address of source. */ 290 struct in_addr imr_sourceaddr; 291 }; 292 #endif 293 294 #if !__USE_KERNEL_IPV6_DEFS 295 /* Likewise, for IPv6. */ 296 struct ipv6_mreq 297 { 298 /* IPv6 multicast address of group */ 299 struct in6_addr ipv6mr_multiaddr; 300 301 /* local interface */ 302 unsigned int ipv6mr_interface; 303 }; 304 #endif /* !__USE_KERNEL_IPV6_DEFS */ 305 306 #ifdef __USE_MISC 307 /* Multicast group request. */ 308 struct group_req 309 { 310 /* Interface index. */ 311 uint32_t gr_interface; 312 313 /* Group address. */ 314 struct sockaddr_storage gr_group; 315 }; 316 317 struct group_source_req 318 { 319 /* Interface index. */ 320 uint32_t gsr_interface; 321 322 /* Group address. */ 323 struct sockaddr_storage gsr_group; 324 325 /* Source address. */ 326 struct sockaddr_storage gsr_source; 327 }; 328 329 330 /* Full-state filter operations. */ 331 struct ip_msfilter 332 { 333 /* IP multicast address of group. */ 334 struct in_addr imsf_multiaddr; 335 336 /* Local IP address of interface. */ 337 struct in_addr imsf_interface; 338 339 /* Filter mode. */ 340 uint32_t imsf_fmode; 341 342 /* Number of source addresses. */ 343 uint32_t imsf_numsrc; 344 /* Source addresses. */ 345 struct in_addr imsf_slist[1]; 346 }; 347 348 #define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \ 349 - sizeof (struct in_addr) \ 350 + (numsrc) * sizeof (struct in_addr)) 351 352 struct group_filter 353 { 354 /* Interface index. */ 355 uint32_t gf_interface; 356 357 /* Group address. */ 358 struct sockaddr_storage gf_group; 359 360 /* Filter mode. */ 361 uint32_t gf_fmode; 362 363 /* Number of source addresses. */ 364 uint32_t gf_numsrc; 365 /* Source addresses. */ 366 struct sockaddr_storage gf_slist[1]; 367 }; 368 369 #define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \ 370 - sizeof (struct sockaddr_storage) \ 371 + ((numsrc) \ 372 * sizeof (struct sockaddr_storage))) 373 #endif 374 375 /* Functions to convert between host and network byte order. 376 377 Please note that these functions normally take `unsigned long int' or 378 `unsigned short int' values as arguments and also return them. But 379 this was a short-sighted decision since on different systems the types 380 may have different representations but the values are always the same. */ 381 382 extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__)); 383 extern uint16_t ntohs (uint16_t __netshort) 384 __THROW __attribute__ ((__const__)); 385 extern uint32_t htonl (uint32_t __hostlong) 386 __THROW __attribute__ ((__const__)); 387 extern uint16_t htons (uint16_t __hostshort) 388 __THROW __attribute__ ((__const__)); 389 390 #include <endian.h> 391 392 /* Get machine dependent optimized versions of byte swapping functions. */ 393 #include <bits/byteswap.h> 394 #include <bits/uintn-identity.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) __uint32_identity (x) 404 # define ntohs(x) __uint16_identity (x) 405 # define htonl(x) __uint32_identity (x) 406 # define htons(x) __uint16_identity (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 #ifdef __GNUC__ 418 # define IN6_IS_ADDR_UNSPECIFIED(a) \ 419 (__extension__ \ 420 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 421 __a->__in6_u.__u6_addr32[0] == 0 \ 422 && __a->__in6_u.__u6_addr32[1] == 0 \ 423 && __a->__in6_u.__u6_addr32[2] == 0 \ 424 && __a->__in6_u.__u6_addr32[3] == 0; })) 425 426 # define IN6_IS_ADDR_LOOPBACK(a) \ 427 (__extension__ \ 428 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 429 __a->__in6_u.__u6_addr32[0] == 0 \ 430 && __a->__in6_u.__u6_addr32[1] == 0 \ 431 && __a->__in6_u.__u6_addr32[2] == 0 \ 432 && __a->__in6_u.__u6_addr32[3] == htonl (1); })) 433 434 # define IN6_IS_ADDR_LINKLOCAL(a) \ 435 (__extension__ \ 436 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 437 (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfe800000); })) 438 439 # define IN6_IS_ADDR_SITELOCAL(a) \ 440 (__extension__ \ 441 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 442 (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfec00000); })) 443 444 # define IN6_IS_ADDR_V4MAPPED(a) \ 445 (__extension__ \ 446 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 447 __a->__in6_u.__u6_addr32[0] == 0 \ 448 && __a->__in6_u.__u6_addr32[1] == 0 \ 449 && __a->__in6_u.__u6_addr32[2] == htonl (0xffff); })) 450 451 # define IN6_IS_ADDR_V4COMPAT(a) \ 452 (__extension__ \ 453 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 454 __a->__in6_u.__u6_addr32[0] == 0 \ 455 && __a->__in6_u.__u6_addr32[1] == 0 \ 456 && __a->__in6_u.__u6_addr32[2] == 0 \ 457 && ntohl (__a->__in6_u.__u6_addr32[3]) > 1; })) 458 459 # define IN6_ARE_ADDR_EQUAL(a,b) \ 460 (__extension__ \ 461 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 462 const struct in6_addr *__b = (const struct in6_addr *) (b); \ 463 __a->__in6_u.__u6_addr32[0] == __b->__in6_u.__u6_addr32[0] \ 464 && __a->__in6_u.__u6_addr32[1] == __b->__in6_u.__u6_addr32[1] \ 465 && __a->__in6_u.__u6_addr32[2] == __b->__in6_u.__u6_addr32[2] \ 466 && __a->__in6_u.__u6_addr32[3] == __b->__in6_u.__u6_addr32[3]; })) 467 #else 468 # define IN6_IS_ADDR_UNSPECIFIED(a) \ 469 (((const uint32_t *) (a))[0] == 0 \ 470 && ((const uint32_t *) (a))[1] == 0 \ 471 && ((const uint32_t *) (a))[2] == 0 \ 472 && ((const uint32_t *) (a))[3] == 0) 473 474 # define IN6_IS_ADDR_LOOPBACK(a) \ 475 (((const uint32_t *) (a))[0] == 0 \ 476 && ((const uint32_t *) (a))[1] == 0 \ 477 && ((const uint32_t *) (a))[2] == 0 \ 478 && ((const uint32_t *) (a))[3] == htonl (1)) 479 480 # define IN6_IS_ADDR_LINKLOCAL(a) \ 481 ((((const uint32_t *) (a))[0] & htonl (0xffc00000)) \ 482 == htonl (0xfe800000)) 483 484 # define IN6_IS_ADDR_SITELOCAL(a) \ 485 ((((const uint32_t *) (a))[0] & htonl (0xffc00000)) \ 486 == htonl (0xfec00000)) 487 488 # define IN6_IS_ADDR_V4MAPPED(a) \ 489 ((((const uint32_t *) (a))[0] == 0) \ 490 && (((const uint32_t *) (a))[1] == 0) \ 491 && (((const uint32_t *) (a))[2] == htonl (0xffff))) 492 493 # define IN6_IS_ADDR_V4COMPAT(a) \ 494 ((((const uint32_t *) (a))[0] == 0) \ 495 && (((const uint32_t *) (a))[1] == 0) \ 496 && (((const uint32_t *) (a))[2] == 0) \ 497 && (ntohl (((const uint32_t *) (a))[3]) > 1)) 498 499 # define IN6_ARE_ADDR_EQUAL(a,b) \ 500 ((((const uint32_t *) (a))[0] == ((const uint32_t *) (b))[0]) \ 501 && (((const uint32_t *) (a))[1] == ((const uint32_t *) (b))[1]) \ 502 && (((const uint32_t *) (a))[2] == ((const uint32_t *) (b))[2]) \ 503 && (((const uint32_t *) (a))[3] == ((const uint32_t *) (b))[3])) 504 #endif 505 506 #define IN6_IS_ADDR_MULTICAST(a) (((const uint8_t *) (a))[0] == 0xff) 507 508 #ifdef __USE_MISC 509 /* Bind socket to a privileged IP port. */ 510 extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW; 511 512 /* The IPv6 version of this function. */ 513 extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in) 514 __THROW; 515 #endif 516 517 518 #define IN6_IS_ADDR_MC_NODELOCAL(a) \ 519 (IN6_IS_ADDR_MULTICAST(a) \ 520 && ((((const uint8_t *) (a))[1] & 0xf) == 0x1)) 521 522 #define IN6_IS_ADDR_MC_LINKLOCAL(a) \ 523 (IN6_IS_ADDR_MULTICAST(a) \ 524 && ((((const uint8_t *) (a))[1] & 0xf) == 0x2)) 525 526 #define IN6_IS_ADDR_MC_SITELOCAL(a) \ 527 (IN6_IS_ADDR_MULTICAST(a) \ 528 && ((((const uint8_t *) (a))[1] & 0xf) == 0x5)) 529 530 #define IN6_IS_ADDR_MC_ORGLOCAL(a) \ 531 (IN6_IS_ADDR_MULTICAST(a) \ 532 && ((((const uint8_t *) (a))[1] & 0xf) == 0x8)) 533 534 #define IN6_IS_ADDR_MC_GLOBAL(a) \ 535 (IN6_IS_ADDR_MULTICAST(a) \ 536 && ((((const uint8_t *) (a))[1] & 0xf) == 0xe)) 537 538 539 #ifdef __USE_GNU 540 struct cmsghdr; /* Forward declaration. */ 541 542 #if !__USE_KERNEL_IPV6_DEFS 543 /* IPv6 packet information. */ 544 struct in6_pktinfo 545 { 546 struct in6_addr ipi6_addr; /* src/dst IPv6 address */ 547 unsigned int ipi6_ifindex; /* send/recv interface index */ 548 }; 549 550 /* IPv6 MTU information. */ 551 struct ip6_mtuinfo 552 { 553 struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */ 554 uint32_t ip6m_mtu; /* path MTU in host byte order */ 555 }; 556 #endif /* !__USE_KERNEL_IPV6_DEFS */ 557 558 /* Obsolete hop-by-hop and Destination Options Processing (RFC 2292). */ 559 extern int inet6_option_space (int __nbytes) 560 __THROW __attribute_deprecated__; 561 extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp, 562 int __type) __THROW __attribute_deprecated__; 563 extern int inet6_option_append (struct cmsghdr *__cmsg, 564 const uint8_t *__typep, int __multx, 565 int __plusy) __THROW __attribute_deprecated__; 566 extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen, 567 int __multx, int __plusy) 568 __THROW __attribute_deprecated__; 569 extern int inet6_option_next (const struct cmsghdr *__cmsg, 570 uint8_t **__tptrp) 571 __THROW __attribute_deprecated__; 572 extern int inet6_option_find (const struct cmsghdr *__cmsg, 573 uint8_t **__tptrp, int __type) 574 __THROW __attribute_deprecated__; 575 576 577 /* Hop-by-Hop and Destination Options Processing (RFC 3542). */ 578 extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW; 579 extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset, 580 uint8_t __type, socklen_t __len, uint8_t __align, 581 void **__databufp) __THROW; 582 extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset) 583 __THROW; 584 extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val, 585 socklen_t __vallen) __THROW; 586 extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset, 587 uint8_t *__typep, socklen_t *__lenp, 588 void **__databufp) __THROW; 589 extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset, 590 uint8_t __type, socklen_t *__lenp, 591 void **__databufp) __THROW; 592 extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val, 593 socklen_t __vallen) __THROW; 594 595 596 /* Routing Header Option (RFC 3542). */ 597 extern socklen_t inet6_rth_space (int __type, int __segments) __THROW; 598 extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type, 599 int __segments) __THROW; 600 extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW; 601 extern int inet6_rth_reverse (const void *__in, void *__out) __THROW; 602 extern int inet6_rth_segments (const void *__bp) __THROW; 603 extern struct in6_addr *inet6_rth_getaddr (const void *__bp, int __index) 604 __THROW; 605 606 607 /* Multicast source filter support. */ 608 609 /* Get IPv4 source filter. */ 610 extern int getipv4sourcefilter (int __s, struct in_addr __interface_addr, 611 struct in_addr __group, uint32_t *__fmode, 612 uint32_t *__numsrc, struct in_addr *__slist) 613 __THROW; 614 615 /* Set IPv4 source filter. */ 616 extern int setipv4sourcefilter (int __s, struct in_addr __interface_addr, 617 struct in_addr __group, uint32_t __fmode, 618 uint32_t __numsrc, 619 const struct in_addr *__slist) 620 __THROW; 621 622 623 /* Get source filter. */ 624 extern int getsourcefilter (int __s, uint32_t __interface_addr, 625 const struct sockaddr *__group, 626 socklen_t __grouplen, uint32_t *__fmode, 627 uint32_t *__numsrc, 628 struct sockaddr_storage *__slist) __THROW; 629 630 /* Set source filter. */ 631 extern int setsourcefilter (int __s, uint32_t __interface_addr, 632 const struct sockaddr *__group, 633 socklen_t __grouplen, uint32_t __fmode, 634 uint32_t __numsrc, 635 const struct sockaddr_storage *__slist) __THROW; 636 #endif /* use GNU */ 637 638 __END_DECLS 639 640 #endif /* netinet/in.h */ 641