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. */
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_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
103enum
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. */
123typedef uint16_t in_port_t;
124
125/* Standard well-known ports. */
126enum
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 */
219struct 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
235extern const struct in6_addr in6addr_any; /* :: */
236extern 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. */
245struct 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. */
260struct 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. */
272struct 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
281struct 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. */
296struct 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. */
308struct group_req
309 {
310 /* Interface index. */
311 uint32_t gr_interface;
312
313 /* Group address. */
314 struct sockaddr_storage gr_group;
315 };
316
317struct 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. */
331struct 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
352struct 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
382extern uint32_t ntohl (uint32_t __netlong) __THROW __attribute__ ((__const__));
383extern uint16_t ntohs (uint16_t __netshort)
384 __THROW __attribute__ ((__const__));
385extern uint32_t htonl (uint32_t __hostlong)
386 __THROW __attribute__ ((__const__));
387extern 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. */
510extern int bindresvport (int __sockfd, struct sockaddr_in *__sock_in) __THROW;
511
512/* The IPv6 version of this function. */
513extern 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
540struct cmsghdr; /* Forward declaration. */
541
542#if !__USE_KERNEL_IPV6_DEFS
543/* IPv6 packet information. */
544struct 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. */
551struct 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). */
559extern int inet6_option_space (int __nbytes)
560 __THROW __attribute_deprecated__;
561extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp,
562 int __type) __THROW __attribute_deprecated__;
563extern int inet6_option_append (struct cmsghdr *__cmsg,
564 const uint8_t *__typep, int __multx,
565 int __plusy) __THROW __attribute_deprecated__;
566extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen,
567 int __multx, int __plusy)
568 __THROW __attribute_deprecated__;
569extern int inet6_option_next (const struct cmsghdr *__cmsg,
570 uint8_t **__tptrp)
571 __THROW __attribute_deprecated__;
572extern 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). */
578extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW;
579extern 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;
582extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset)
583 __THROW;
584extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val,
585 socklen_t __vallen) __THROW;
586extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset,
587 uint8_t *__typep, socklen_t *__lenp,
588 void **__databufp) __THROW;
589extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset,
590 uint8_t __type, socklen_t *__lenp,
591 void **__databufp) __THROW;
592extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val,
593 socklen_t __vallen) __THROW;
594
595
596/* Routing Header Option (RFC 3542). */
597extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;
598extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,
599 int __segments) __THROW;
600extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW;
601extern int inet6_rth_reverse (const void *__in, void *__out) __THROW;
602extern int inet6_rth_segments (const void *__bp) __THROW;
603extern 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. */
610extern 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. */
616extern 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. */
624extern 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. */
631extern 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