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. */
30typedef uint32_t in_addr_t;
31struct 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. */
40enum
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
105enum
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. */
125typedef uint16_t in_port_t;
126
127/* Standard well-known ports. */
128enum
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 */
221struct 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
237extern const struct in6_addr in6addr_any; /* :: */
238extern 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. */
247struct 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. */
262struct 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. */
274struct 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. */
284struct 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
296struct 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. */
311struct 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. */
323struct group_req
324 {
325 /* Interface index. */
326 uint32_t gr_interface;
327
328 /* Group address. */
329 struct sockaddr_storage gr_group;
330 };
331
332struct 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. */
346struct 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
367struct 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
397extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));
398extern uint16_t ntohs (uint16_t __netshort)
399 __THROW __attribute__ ((__const__));
400extern uint32_t htonl (uint32_t __hostlong)
401 __THROW __attribute__ ((__const__));
402extern 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. */
525extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW;
526
527/* The IPv6 version of this function. */
528extern 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
555struct cmsghdr; /* Forward declaration. */
556
557#if !__USE_KERNEL_IPV6_DEFS
558/* IPv6 packet information. */
559struct 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. */
566struct 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). */
574extern int inet6_option_space (int __nbytes)
575 __THROW __attribute_deprecated__;
576extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp,
577 int __type) __THROW __attribute_deprecated__;
578extern int inet6_option_append (struct cmsghdr *__cmsg,
579 const uint8_t *__typep, int __multx,
580 int __plusy) __THROW __attribute_deprecated__;
581extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen,
582 int __multx, int __plusy)
583 __THROW __attribute_deprecated__;
584extern int inet6_option_next (const struct cmsghdr *__cmsg,
585 uint8_t **__tptrp)
586 __THROW __attribute_deprecated__;
587extern 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). */
593extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW;
594extern 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;
597extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset)
598 __THROW;
599extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val,
600 socklen_t __vallen) __THROW;
601extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset,
602 uint8_t *__typep, socklen_t *__lenp,
603 void **__databufp) __THROW;
604extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset,
605 uint8_t __type, socklen_t *__lenp,
606 void **__databufp) __THROW;
607extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val,
608 socklen_t __vallen) __THROW;
609
610
611/* Routing Header Option (RFC 3542). */
612extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;
613extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,
614 int __segments) __THROW;
615extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW;
616extern int inet6_rth_reverse (const void *__in, void *__out) __THROW;
617extern int inet6_rth_segments (const void *__bp) __THROW;
618extern 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. */
625extern 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. */
631extern 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. */
639extern 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. */
646extern 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 */
656