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The C and C++ Include Header Files
/usr/include/netinet/in.h
$ cat -n /usr/include/netinet/in.h 1 /* Copyright (C) 1991-2024 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_L2TP = 115, /* Layer 2 Tunnelling Protocol. */ 85 #define IPPROTO_L2TP IPPROTO_L2TP 86 IPPROTO_SCTP = 132, /* Stream Control Transmission Protocol. */ 87 #define IPPROTO_SCTP IPPROTO_SCTP 88 IPPROTO_UDPLITE = 136, /* UDP-Lite protocol. */ 89 #define IPPROTO_UDPLITE IPPROTO_UDPLITE 90 IPPROTO_MPLS = 137, /* MPLS in IP. */ 91 #define IPPROTO_MPLS IPPROTO_MPLS 92 IPPROTO_ETHERNET = 143, /* Ethernet-within-IPv6 Encapsulation. */ 93 #define IPPROTO_ETHERNET IPPROTO_ETHERNET 94 IPPROTO_RAW = 255, /* Raw IP packets. */ 95 #define IPPROTO_RAW IPPROTO_RAW 96 IPPROTO_MPTCP = 262, /* Multipath TCP connection. */ 97 #define IPPROTO_MPTCP IPPROTO_MPTCP 98 IPPROTO_MAX 99 }; 100 101 /* If __USE_KERNEL_IPV6_DEFS is 1 then the user has included the kernel 102 network headers first and we should use those ABI-identical definitions 103 instead of our own, otherwise 0. */ 104 #if !__USE_KERNEL_IPV6_DEFS 105 enum 106 { 107 IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */ 108 #define IPPROTO_HOPOPTS IPPROTO_HOPOPTS 109 IPPROTO_ROUTING = 43, /* IPv6 routing header. */ 110 #define IPPROTO_ROUTING IPPROTO_ROUTING 111 IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header. */ 112 #define IPPROTO_FRAGMENT IPPROTO_FRAGMENT 113 IPPROTO_ICMPV6 = 58, /* ICMPv6. */ 114 #define IPPROTO_ICMPV6 IPPROTO_ICMPV6 115 IPPROTO_NONE = 59, /* IPv6 no next header. */ 116 #define IPPROTO_NONE IPPROTO_NONE 117 IPPROTO_DSTOPTS = 60, /* IPv6 destination options. */ 118 #define IPPROTO_DSTOPTS IPPROTO_DSTOPTS 119 IPPROTO_MH = 135 /* IPv6 mobility header. */ 120 #define IPPROTO_MH IPPROTO_MH 121 }; 122 #endif /* !__USE_KERNEL_IPV6_DEFS */ 123 124 /* Type to represent a port. */ 125 typedef uint16_t in_port_t; 126 127 /* Standard well-known ports. */ 128 enum 129 { 130 IPPORT_ECHO = 7, /* Echo service. */ 131 IPPORT_DISCARD = 9, /* Discard transmissions service. */ 132 IPPORT_SYSTAT = 11, /* System status service. */ 133 IPPORT_DAYTIME = 13, /* Time of day service. */ 134 IPPORT_NETSTAT = 15, /* Network status service. */ 135 IPPORT_FTP = 21, /* File Transfer Protocol. */ 136 IPPORT_TELNET = 23, /* Telnet protocol. */ 137 IPPORT_SMTP = 25, /* Simple Mail Transfer Protocol. */ 138 IPPORT_TIMESERVER = 37, /* Timeserver service. */ 139 IPPORT_NAMESERVER = 42, /* Domain Name Service. */ 140 IPPORT_WHOIS = 43, /* Internet Whois service. */ 141 IPPORT_MTP = 57, 142 143 IPPORT_TFTP = 69, /* Trivial File Transfer Protocol. */ 144 IPPORT_RJE = 77, 145 IPPORT_FINGER = 79, /* Finger service. */ 146 IPPORT_TTYLINK = 87, 147 IPPORT_SUPDUP = 95, /* SUPDUP protocol. */ 148 149 150 IPPORT_EXECSERVER = 512, /* execd service. */ 151 IPPORT_LOGINSERVER = 513, /* rlogind service. */ 152 IPPORT_CMDSERVER = 514, 153 IPPORT_EFSSERVER = 520, 154 155 /* UDP ports. */ 156 IPPORT_BIFFUDP = 512, 157 IPPORT_WHOSERVER = 513, 158 IPPORT_ROUTESERVER = 520, 159 160 /* Ports less than this value are reserved for privileged processes. */ 161 IPPORT_RESERVED = 1024, 162 163 /* Ports greater this value are reserved for (non-privileged) servers. */ 164 IPPORT_USERRESERVED = 5000 165 }; 166 167 /* Definitions of the bits in an Internet address integer. 168 169 On subnets, host and network parts are found according to 170 the subnet mask, not these masks. */ 171 172 #define IN_CLASSA(a) ((((in_addr_t)(a)) & 0x80000000) == 0) 173 #define IN_CLASSA_NET 0xff000000 174 #define IN_CLASSA_NSHIFT 24 175 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 176 #define IN_CLASSA_MAX 128 177 178 #define IN_CLASSB(a) ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000) 179 #define IN_CLASSB_NET 0xffff0000 180 #define IN_CLASSB_NSHIFT 16 181 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 182 #define IN_CLASSB_MAX 65536 183 184 #define IN_CLASSC(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000) 185 #define IN_CLASSC_NET 0xffffff00 186 #define IN_CLASSC_NSHIFT 8 187 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 188 189 #define IN_CLASSD(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xe0000000) 190 #define IN_MULTICAST(a) IN_CLASSD(a) 191 192 #define IN_EXPERIMENTAL(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000) 193 #define IN_BADCLASS(a) ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000) 194 195 /* Address to accept any incoming messages. */ 196 #define INADDR_ANY ((in_addr_t) 0x00000000) 197 /* Address to send to all hosts. */ 198 #define INADDR_BROADCAST ((in_addr_t) 0xffffffff) 199 /* Address indicating an error return. */ 200 #define INADDR_NONE ((in_addr_t) 0xffffffff) 201 /* Dummy address for source of ICMPv6 errors converted to IPv4 (RFC 202 7600). */ 203 #define INADDR_DUMMY ((in_addr_t) 0xc0000008) 204 205 /* Network number for local host loopback. */ 206 #define IN_LOOPBACKNET 127 207 /* Address to loopback in software to local host. */ 208 #ifndef INADDR_LOOPBACK 209 # define INADDR_LOOPBACK ((in_addr_t) 0x7f000001) /* Inet 127.0.0.1. */ 210 #endif 211 212 /* Defines for Multicast INADDR. */ 213 #define INADDR_UNSPEC_GROUP ((in_addr_t) 0xe0000000) /* 224.0.0.0 */ 214 #define INADDR_ALLHOSTS_GROUP ((in_addr_t) 0xe0000001) /* 224.0.0.1 */ 215 #define INADDR_ALLRTRS_GROUP ((in_addr_t) 0xe0000002) /* 224.0.0.2 */ 216 #define INADDR_ALLSNOOPERS_GROUP ((in_addr_t) 0xe000006a) /* 224.0.0.106 */ 217 #define INADDR_MAX_LOCAL_GROUP ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */ 218 219 #if !__USE_KERNEL_IPV6_DEFS 220 /* IPv6 address */ 221 struct in6_addr 222 { 223 union 224 { 225 uint8_t __u6_addr8[16]; 226 uint16_t __u6_addr16[8]; 227 uint32_t __u6_addr32[4]; 228 } __in6_u; 229 #define s6_addr __in6_u.__u6_addr8 230 #ifdef __USE_MISC 231 # define s6_addr16 __in6_u.__u6_addr16 232 # define s6_addr32 __in6_u.__u6_addr32 233 #endif 234 }; 235 #endif /* !__USE_KERNEL_IPV6_DEFS */ 236 237 extern const struct in6_addr in6addr_any; /* :: */ 238 extern const struct in6_addr in6addr_loopback; /* ::1 */ 239 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 240 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 241 242 #define INET_ADDRSTRLEN 16 243 #define INET6_ADDRSTRLEN 46 244 245 246 /* Structure describing an Internet socket address. */ 247 struct sockaddr_in 248 { 249 __SOCKADDR_COMMON (sin_); 250 in_port_t sin_port; /* Port number. */ 251 struct in_addr sin_addr; /* Internet address. */ 252 253 /* Pad to size of `struct sockaddr'. */ 254 unsigned char sin_zero[sizeof (struct sockaddr) 255 - __SOCKADDR_COMMON_SIZE 256 - sizeof (in_port_t) 257 - sizeof (struct in_addr)]; 258 }; 259 260 #if !__USE_KERNEL_IPV6_DEFS 261 /* Ditto, for IPv6. */ 262 struct sockaddr_in6 263 { 264 __SOCKADDR_COMMON (sin6_); 265 in_port_t sin6_port; /* Transport layer port # */ 266 uint32_t sin6_flowinfo; /* IPv6 flow information */ 267 struct in6_addr sin6_addr; /* IPv6 address */ 268 uint32_t sin6_scope_id; /* IPv6 scope-id */ 269 }; 270 #endif /* !__USE_KERNEL_IPV6_DEFS */ 271 272 #ifdef __USE_MISC 273 /* IPv4 multicast request. */ 274 struct ip_mreq 275 { 276 /* IP multicast address of group. */ 277 struct in_addr imr_multiaddr; 278 279 /* Local IP address of interface. */ 280 struct in_addr imr_interface; 281 }; 282 283 /* IPv4 multicast request with interface index. */ 284 struct ip_mreqn 285 { 286 /* IP multicast address of group. */ 287 struct in_addr imr_multiaddr; 288 289 /* Local IP address of interface. */ 290 struct in_addr imr_address; 291 292 /* Interface index. */ 293 int imr_ifindex; 294 }; 295 296 struct ip_mreq_source 297 { 298 /* IP multicast address of group. */ 299 struct in_addr imr_multiaddr; 300 301 /* IP address of interface. */ 302 struct in_addr imr_interface; 303 304 /* IP address of source. */ 305 struct in_addr imr_sourceaddr; 306 }; 307 #endif 308 309 #if !__USE_KERNEL_IPV6_DEFS 310 /* Likewise, for IPv6. */ 311 struct ipv6_mreq 312 { 313 /* IPv6 multicast address of group */ 314 struct in6_addr ipv6mr_multiaddr; 315 316 /* local interface */ 317 unsigned int ipv6mr_interface; 318 }; 319 #endif /* !__USE_KERNEL_IPV6_DEFS */ 320 321 #ifdef __USE_MISC 322 /* Multicast group request. */ 323 struct group_req 324 { 325 /* Interface index. */ 326 uint32_t gr_interface; 327 328 /* Group address. */ 329 struct sockaddr_storage gr_group; 330 }; 331 332 struct group_source_req 333 { 334 /* Interface index. */ 335 uint32_t gsr_interface; 336 337 /* Group address. */ 338 struct sockaddr_storage gsr_group; 339 340 /* Source address. */ 341 struct sockaddr_storage gsr_source; 342 }; 343 344 345 /* Full-state filter operations. */ 346 struct ip_msfilter 347 { 348 /* IP multicast address of group. */ 349 struct in_addr imsf_multiaddr; 350 351 /* Local IP address of interface. */ 352 struct in_addr imsf_interface; 353 354 /* Filter mode. */ 355 uint32_t imsf_fmode; 356 357 /* Number of source addresses. */ 358 uint32_t imsf_numsrc; 359 /* Source addresses. */ 360 struct in_addr imsf_slist[1]; 361 }; 362 363 #define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \ 364 - sizeof (struct in_addr) \ 365 + (numsrc) * sizeof (struct in_addr)) 366 367 struct group_filter 368 { 369 /* Interface index. */ 370 uint32_t gf_interface; 371 372 /* Group address. */ 373 struct sockaddr_storage gf_group; 374 375 /* Filter mode. */ 376 uint32_t gf_fmode; 377 378 /* Number of source addresses. */ 379 uint32_t gf_numsrc; 380 /* Source addresses. */ 381 struct sockaddr_storage gf_slist[1]; 382 }; 383 384 #define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \ 385 - sizeof (struct sockaddr_storage) \ 386 + ((numsrc) \ 387 * sizeof (struct sockaddr_storage))) 388 #endif 389 390 /* Functions to convert between host and network byte order. 391 392 Please note that these functions normally take `unsigned long int' or 393 `unsigned short int' values as arguments and also return them. But 394 this was a short-sighted decision since on different systems the types 395 may have different representations but the values are always the same. */ 396 397 extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__)); 398 extern uint16_t ntohs (uint16_t __netshort) 399 __THROW __attribute__ ((__const__)); 400 extern uint32_t htonl (uint32_t __hostlong) 401 __THROW __attribute__ ((__const__)); 402 extern uint16_t htons (uint16_t __hostshort) 403 __THROW __attribute__ ((__const__)); 404 405 #include <endian.h> 406 407 /* Get machine dependent optimized versions of byte swapping functions. */ 408 #include <bits/byteswap.h> 409 #include <bits/uintn-identity.h> 410 411 #ifdef __OPTIMIZE__ 412 /* We can optimize calls to the conversion functions. Either nothing has 413 to be done or we are using directly the byte-swapping functions which 414 often can be inlined. */ 415 # if __BYTE_ORDER == __BIG_ENDIAN 416 /* The host byte order is the same as network byte order, 417 so these functions are all just identity. */ 418 # define ntohl(x) __uint32_identity (x) 419 # define ntohs(x) __uint16_identity (x) 420 # define htonl(x) __uint32_identity (x) 421 # define htons(x) __uint16_identity (x) 422 # else 423 # if __BYTE_ORDER == __LITTLE_ENDIAN 424 # define ntohl(x) __bswap_32 (x) 425 # define ntohs(x) __bswap_16 (x) 426 # define htonl(x) __bswap_32 (x) 427 # define htons(x) __bswap_16 (x) 428 # endif 429 # endif 430 #endif 431 432 #ifdef __GNUC__ 433 # define IN6_IS_ADDR_UNSPECIFIED(a) \ 434 (__extension__ \ 435 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 436 __a->__in6_u.__u6_addr32[0] == 0 \ 437 && __a->__in6_u.__u6_addr32[1] == 0 \ 438 && __a->__in6_u.__u6_addr32[2] == 0 \ 439 && __a->__in6_u.__u6_addr32[3] == 0; })) 440 441 # define IN6_IS_ADDR_LOOPBACK(a) \ 442 (__extension__ \ 443 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 444 __a->__in6_u.__u6_addr32[0] == 0 \ 445 && __a->__in6_u.__u6_addr32[1] == 0 \ 446 && __a->__in6_u.__u6_addr32[2] == 0 \ 447 && __a->__in6_u.__u6_addr32[3] == htonl (1); })) 448 449 # define IN6_IS_ADDR_LINKLOCAL(a) \ 450 (__extension__ \ 451 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 452 (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfe800000); })) 453 454 # define IN6_IS_ADDR_SITELOCAL(a) \ 455 (__extension__ \ 456 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 457 (__a->__in6_u.__u6_addr32[0] & htonl (0xffc00000)) == htonl (0xfec00000); })) 458 459 # define IN6_IS_ADDR_V4MAPPED(a) \ 460 (__extension__ \ 461 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 462 __a->__in6_u.__u6_addr32[0] == 0 \ 463 && __a->__in6_u.__u6_addr32[1] == 0 \ 464 && __a->__in6_u.__u6_addr32[2] == htonl (0xffff); })) 465 466 # define IN6_IS_ADDR_V4COMPAT(a) \ 467 (__extension__ \ 468 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 469 __a->__in6_u.__u6_addr32[0] == 0 \ 470 && __a->__in6_u.__u6_addr32[1] == 0 \ 471 && __a->__in6_u.__u6_addr32[2] == 0 \ 472 && ntohl (__a->__in6_u.__u6_addr32[3]) > 1; })) 473 474 # define IN6_ARE_ADDR_EQUAL(a,b) \ 475 (__extension__ \ 476 ({ const struct in6_addr *__a = (const struct in6_addr *) (a); \ 477 const struct in6_addr *__b = (const struct in6_addr *) (b); \ 478 __a->__in6_u.__u6_addr32[0] == __b->__in6_u.__u6_addr32[0] \ 479 && __a->__in6_u.__u6_addr32[1] == __b->__in6_u.__u6_addr32[1] \ 480 && __a->__in6_u.__u6_addr32[2] == __b->__in6_u.__u6_addr32[2] \ 481 && __a->__in6_u.__u6_addr32[3] == __b->__in6_u.__u6_addr32[3]; })) 482 #else 483 # define IN6_IS_ADDR_UNSPECIFIED(a) \ 484 (((const uint32_t *) (a))[0] == 0 \ 485 && ((const uint32_t *) (a))[1] == 0 \ 486 && ((const uint32_t *) (a))[2] == 0 \ 487 && ((const uint32_t *) (a))[3] == 0) 488 489 # define IN6_IS_ADDR_LOOPBACK(a) \ 490 (((const uint32_t *) (a))[0] == 0 \ 491 && ((const uint32_t *) (a))[1] == 0 \ 492 && ((const uint32_t *) (a))[2] == 0 \ 493 && ((const uint32_t *) (a))[3] == htonl (1)) 494 495 # define IN6_IS_ADDR_LINKLOCAL(a) \ 496 ((((const uint32_t *) (a))[0] & htonl (0xffc00000)) \ 497 == htonl (0xfe800000)) 498 499 # define IN6_IS_ADDR_SITELOCAL(a) \ 500 ((((const uint32_t *) (a))[0] & htonl (0xffc00000)) \ 501 == htonl (0xfec00000)) 502 503 # define IN6_IS_ADDR_V4MAPPED(a) \ 504 ((((const uint32_t *) (a))[0] == 0) \ 505 && (((const uint32_t *) (a))[1] == 0) \ 506 && (((const uint32_t *) (a))[2] == htonl (0xffff))) 507 508 # define IN6_IS_ADDR_V4COMPAT(a) \ 509 ((((const uint32_t *) (a))[0] == 0) \ 510 && (((const uint32_t *) (a))[1] == 0) \ 511 && (((const uint32_t *) (a))[2] == 0) \ 512 && (ntohl (((const uint32_t *) (a))[3]) > 1)) 513 514 # define IN6_ARE_ADDR_EQUAL(a,b) \ 515 ((((const uint32_t *) (a))[0] == ((const uint32_t *) (b))[0]) \ 516 && (((const uint32_t *) (a))[1] == ((const uint32_t *) (b))[1]) \ 517 && (((const uint32_t *) (a))[2] == ((const uint32_t *) (b))[2]) \ 518 && (((const uint32_t *) (a))[3] == ((const uint32_t *) (b))[3])) 519 #endif 520 521 #define IN6_IS_ADDR_MULTICAST(a) (((const uint8_t *) (a))[0] == 0xff) 522 523 #ifdef __USE_MISC 524 /* Bind socket to a privileged IP port. */ 525 extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW; 526 527 /* The IPv6 version of this function. */ 528 extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in) 529 __THROW; 530 #endif 531 532 533 #define IN6_IS_ADDR_MC_NODELOCAL(a) \ 534 (IN6_IS_ADDR_MULTICAST(a) \ 535 && ((((const uint8_t *) (a))[1] & 0xf) == 0x1)) 536 537 #define IN6_IS_ADDR_MC_LINKLOCAL(a) \ 538 (IN6_IS_ADDR_MULTICAST(a) \ 539 && ((((const uint8_t *) (a))[1] & 0xf) == 0x2)) 540 541 #define IN6_IS_ADDR_MC_SITELOCAL(a) \ 542 (IN6_IS_ADDR_MULTICAST(a) \ 543 && ((((const uint8_t *) (a))[1] & 0xf) == 0x5)) 544 545 #define IN6_IS_ADDR_MC_ORGLOCAL(a) \ 546 (IN6_IS_ADDR_MULTICAST(a) \ 547 && ((((const uint8_t *) (a))[1] & 0xf) == 0x8)) 548 549 #define IN6_IS_ADDR_MC_GLOBAL(a) \ 550 (IN6_IS_ADDR_MULTICAST(a) \ 551 && ((((const uint8_t *) (a))[1] & 0xf) == 0xe)) 552 553 554 #ifdef __USE_GNU 555 struct cmsghdr; /* Forward declaration. */ 556 557 #if !__USE_KERNEL_IPV6_DEFS 558 /* IPv6 packet information. */ 559 struct in6_pktinfo 560 { 561 struct in6_addr ipi6_addr; /* src/dst IPv6 address */ 562 unsigned int ipi6_ifindex; /* send/recv interface index */ 563 }; 564 565 /* IPv6 MTU information. */ 566 struct ip6_mtuinfo 567 { 568 struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */ 569 uint32_t ip6m_mtu; /* path MTU in host byte order */ 570 }; 571 #endif /* !__USE_KERNEL_IPV6_DEFS */ 572 573 /* Obsolete hop-by-hop and Destination Options Processing (RFC 2292). */ 574 extern int inet6_option_space (int __nbytes) 575 __THROW __attribute_deprecated__; 576 extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp, 577 int __type) __THROW __attribute_deprecated__; 578 extern int inet6_option_append (struct cmsghdr *__cmsg, 579 const uint8_t *__typep, int __multx, 580 int __plusy) __THROW __attribute_deprecated__; 581 extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen, 582 int __multx, int __plusy) 583 __THROW __attribute_deprecated__; 584 extern int inet6_option_next (const struct cmsghdr *__cmsg, 585 uint8_t **__tptrp) 586 __THROW __attribute_deprecated__; 587 extern int inet6_option_find (const struct cmsghdr *__cmsg, 588 uint8_t **__tptrp, int __type) 589 __THROW __attribute_deprecated__; 590 591 592 /* Hop-by-Hop and Destination Options Processing (RFC 3542). */ 593 extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW; 594 extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset, 595 uint8_t __type, socklen_t __len, uint8_t __align, 596 void **__databufp) __THROW; 597 extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset) 598 __THROW; 599 extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val, 600 socklen_t __vallen) __THROW; 601 extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset, 602 uint8_t *__typep, socklen_t *__lenp, 603 void **__databufp) __THROW; 604 extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset, 605 uint8_t __type, socklen_t *__lenp, 606 void **__databufp) __THROW; 607 extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val, 608 socklen_t __vallen) __THROW; 609 610 611 /* Routing Header Option (RFC 3542). */ 612 extern socklen_t inet6_rth_space (int __type, int __segments) __THROW; 613 extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type, 614 int __segments) __THROW; 615 extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW; 616 extern int inet6_rth_reverse (const void *__in, void *__out) __THROW; 617 extern int inet6_rth_segments (const void *__bp) __THROW; 618 extern struct in6_addr *inet6_rth_getaddr (const void *__bp, int __index) 619 __THROW; 620 621 622 /* Multicast source filter support. */ 623 624 /* Get IPv4 source filter. */ 625 extern int getipv4sourcefilter (int __s, struct in_addr __interface_addr, 626 struct in_addr __group, uint32_t *__fmode, 627 uint32_t *__numsrc, struct in_addr *__slist) 628 __THROW; 629 630 /* Set IPv4 source filter. */ 631 extern int setipv4sourcefilter (int __s, struct in_addr __interface_addr, 632 struct in_addr __group, uint32_t __fmode, 633 uint32_t __numsrc, 634 const struct in_addr *__slist) 635 __THROW; 636 637 638 /* Get source filter. */ 639 extern int getsourcefilter (int __s, uint32_t __interface_addr, 640 const struct sockaddr *__group, 641 socklen_t __grouplen, uint32_t *__fmode, 642 uint32_t *__numsrc, 643 struct sockaddr_storage *__slist) __THROW; 644 645 /* Set source filter. */ 646 extern int setsourcefilter (int __s, uint32_t __interface_addr, 647 const struct sockaddr *__group, 648 socklen_t __grouplen, uint32_t __fmode, 649 uint32_t __numsrc, 650 const struct sockaddr_storage *__slist) __THROW; 651 #endif /* use GNU */ 652 653 __END_DECLS 654 655 #endif /* netinet/in.h */
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