1/* $NetBSD: socket.h,v 1.134 2025/07/25 23:24:46 kre Exp $ */
2
3/*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32/*
33 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)socket.h 8.6 (Berkeley) 5/3/95
61 */
62
63#ifndef _SYS_SOCKET_H_
64#define _SYS_SOCKET_H_
65
66#include <sys/featuretest.h>
67
68/*
69 * Definitions related to sockets: types, address families, options.
70 */
71
72/*
73 * Data types.
74 */
75#include <sys/ansi.h>
76
77#ifndef sa_family_t
78typedef __sa_family_t sa_family_t;
79#define sa_family_t __sa_family_t
80#endif
81
82#ifndef socklen_t
83typedef __socklen_t socklen_t;
84#define socklen_t __socklen_t
85#endif
86
87#include <machine/ansi.h>
88
89#ifdef _BSD_SIZE_T_
90typedef _BSD_SIZE_T_ size_t;
91#undef _BSD_SIZE_T_
92#endif
93
94#ifdef _BSD_SSIZE_T_
95typedef _BSD_SSIZE_T_ ssize_t;
96#undef _BSD_SSIZE_T_
97#endif
98
99#include <sys/uio.h>
100#include <sys/sigtypes.h>
101
102/*
103 * Socket types.
104 */
105#define SOCK_STREAM 1 /* stream socket */
106#define SOCK_DGRAM 2 /* datagram socket */
107#define SOCK_RAW 3 /* raw-protocol interface */
108#define SOCK_RDM 4 /* reliably-delivered message */
109#define SOCK_SEQPACKET 5 /* sequenced packet stream */
110#define SOCK_CONN_DGRAM 6 /* connection-orientated datagram */
111#define SOCK_DCCP SOCK_CONN_DGRAM
112
113#define SOCK_CLOEXEC 0x10000000 /* set close on exec on socket */
114#define SOCK_NONBLOCK 0x20000000 /* set non blocking i/o socket */
115#define SOCK_NOSIGPIPE 0x40000000 /* don't send sigpipe */
116#define SOCK_CLOFORK 0x80000000 /* set close on fork on socket */
117#define SOCK_FLAGS_MASK 0xf0000000 /* flags mask */
118
119/*
120 * Option flags per-socket.
121 */
122#define SO_DEBUG 0x0001 /* turn on debugging info recording */
123#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
124#define SO_REUSEADDR 0x0004 /* allow local address reuse */
125#define SO_KEEPALIVE 0x0008 /* keep connections alive */
126#define SO_DONTROUTE 0x0010 /* just use interface addresses */
127#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
128#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
129#define SO_LINGER 0x0080 /* linger on close if data present */
130#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
131#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
132/* SO_OTIMESTAMP 0x0400 */
133#define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
134#define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
135#define SO_TIMESTAMP 0x2000 /* timestamp received dgram traffic */
136#define SO_RERROR 0x4000 /* Keep track of receive errors */
137
138/* Allowed default option flags */
139#define SO_DEFOPTS (SO_DEBUG|SO_REUSEADDR|SO_KEEPALIVE|SO_DONTROUTE| \
140 SO_BROADCAST|SO_USELOOPBACK|SO_LINGER|SO_OOBINLINE|SO_REUSEPORT| \
141 SO_NOSIGPIPE|SO_TIMESTAMP|SO_RERROR)
142
143#define __SO_OPTION_BITS \
144 "\20" \
145 "\1SO_DEBUG" \
146 "\2SO_ACCEPTCONN" \
147 "\3SO_REUSEADDR" \
148 "\4SO_KEEPALIVE" \
149 "\5SO_DONTROUTE" \
150 "\6SO_BROADCAST" \
151 "\7SO_USELOOPBACK" \
152 "\10SO_LINGER" \
153 "\11SO_OOBINLINE" \
154 "\12SO_REUSEPORT" \
155 "\13SO_OTIMESTAMP" \
156 "\14SO_NOSIGPIPE" \
157 "\15SO_ACCEPTFILTER" \
158 "\16SO_TIMESTAMP" \
159 "\17SO_RERROR"
160
161/*
162 * Additional options, not kept in so_options.
163 */
164#define SO_SNDBUF 0x1001 /* send buffer size */
165#define SO_RCVBUF 0x1002 /* receive buffer size */
166#define SO_SNDLOWAT 0x1003 /* send low-water mark */
167#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
168/* SO_OSNDTIMEO 0x1005 */
169/* SO_ORCVTIMEO 0x1006 */
170#define SO_ERROR 0x1007 /* get error status and clear */
171#define SO_TYPE 0x1008 /* get socket type */
172#define SO_OVERFLOWED 0x1009 /* datagrams: return packets dropped */
173
174#define SO_NOHEADER 0x100a /* user supplies no header to kernel;
175 * kernel removes header and supplies
176 * payload
177 */
178#define SO_SNDTIMEO 0x100b /* send timeout */
179#define SO_RCVTIMEO 0x100c /* receive timeout */
180/*
181 * Structure used for manipulating linger option.
182 */
183struct linger {
184 int l_onoff; /* option on/off */
185 int l_linger; /* linger time in seconds */
186};
187
188struct accept_filter_arg {
189 char af_name[16];
190 char af_arg[256-16];
191};
192
193/*
194 * Level number for (get/set)sockopt() to apply to socket itself.
195 */
196#define SOL_SOCKET 0xffff /* options for socket level */
197
198/*
199 * Address families.
200 */
201#define AF_UNSPEC 0 /* unspecified */
202#define AF_LOCAL 1 /* local to host */
203#define AF_UNIX AF_LOCAL /* backward compatibility */
204#define AF_INET 2 /* internetwork: UDP, TCP, etc. */
205#define AF_IMPLINK 3 /* arpanet imp addresses */
206#define AF_PUP 4 /* pup protocols: e.g. BSP */
207#define AF_CHAOS 5 /* mit CHAOS protocols */
208#define AF_NS 6 /* XEROX NS protocols */
209#define AF_ISO 7 /* ISO protocols */
210#define AF_OSI AF_ISO
211#define AF_ECMA 8 /* european computer manufacturers */
212#define AF_DATAKIT 9 /* datakit protocols */
213#define AF_CCITT 10 /* CCITT protocols, X.25 etc */
214#define AF_SNA 11 /* IBM SNA */
215#define AF_DECnet 12 /* DECnet */
216#define AF_DLI 13 /* DEC Direct data link interface */
217#define AF_LAT 14 /* LAT */
218#define AF_HYLINK 15 /* NSC Hyperchannel */
219#define AF_APPLETALK 16 /* Apple Talk */
220#define AF_OROUTE 17 /* Internal Routing Protocol */
221#define AF_LINK 18 /* Link layer interface */
222#if defined(_NETBSD_SOURCE)
223#define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
224#endif
225#define AF_COIP 20 /* connection-oriented IP, aka ST II */
226#define AF_CNT 21 /* Computer Network Technology */
227#if defined(_NETBSD_SOURCE)
228#define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
229#endif
230#define AF_IPX 23 /* Novell Internet Protocol */
231#define AF_INET6 24 /* IP version 6 */
232#if defined(_NETBSD_SOURCE)
233#define pseudo_AF_PIP 25 /* Help Identify PIP packets */
234#endif
235#define AF_ISDN 26 /* Integrated Services Digital Network*/
236#define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
237#define AF_NATM 27 /* native ATM access */
238#define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */
239#if defined(_NETBSD_SOURCE)
240#define pseudo_AF_KEY 29 /* Internal key management protocol */
241#define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs
242 in interface output routine */
243#endif
244#define AF_BLUETOOTH 31 /* Bluetooth: HCI, SCO, L2CAP, RFCOMM */
245#define AF_IEEE80211 32 /* IEEE80211 */
246#define AF_MPLS 33 /* MultiProtocol Label Switching */
247#define AF_ROUTE 34 /* Internal Routing Protocol */
248#define AF_CAN 35
249#define AF_ETHER 36
250#define AF_MAX 37
251
252/*
253 * Structure used by kernel to store most
254 * addresses.
255 */
256struct sockaddr {
257 __uint8_t sa_len; /* total length */
258 sa_family_t sa_family; /* address family */
259 char sa_data[14]; /* actually longer; address value */
260};
261
262#if defined(_KERNEL)
263/*
264 * Structure used by kernel to pass protocol
265 * information in raw sockets.
266 */
267struct sockproto {
268 u_short sp_family; /* address family */
269 u_short sp_protocol; /* protocol */
270};
271
272/*
273 * we make the entire struct at least UCHAR_MAX + 1 in size since existing
274 * use of sockaddr_un permits a path up to 253 bytes + '\0'.
275 * sizeof(sb_len) + sizeof(sb_family) + 253 + '\0'
276 */
277#define _SB_DATASIZE 254
278struct sockaddr_big {
279 union {
280 struct {
281 __uint8_t sb_len;
282 sa_family_t sb_family;
283 char sb_data[_SB_DATASIZE];
284 };
285 uint64_t dummy; /* solicit natural alignment */
286 };
287};
288
289#endif /* _KERNEL */
290
291/*
292 * RFC 2553: protocol-independent placeholder for socket addresses
293 */
294#define _SS_MAXSIZE 128
295#define _SS_ALIGNSIZE (sizeof(__int64_t))
296#define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2)
297#define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - _SS_PAD1SIZE - _SS_ALIGNSIZE)
298
299struct sockaddr_storage {
300 __uint8_t ss_len; /* address length */
301 sa_family_t ss_family; /* address family */
302 char __ss_pad1[_SS_PAD1SIZE];
303 __int64_t __ss_align;/* force desired structure storage alignment */
304 char __ss_pad2[_SS_PAD2SIZE];
305};
306
307#if defined(_NETBSD_SOURCE)
308#define sstosa(__ss) ((struct sockaddr *)(__ss))
309#define sstocsa(__ss) ((const struct sockaddr *)(__ss))
310#endif /* _NETBSD_SOURCE */
311
312/*
313 * Protocol families, same as address families for now.
314 */
315#define PF_UNSPEC AF_UNSPEC
316#define PF_LOCAL AF_LOCAL
317#define PF_UNIX PF_LOCAL /* backward compatibility */
318#define PF_INET AF_INET
319#define PF_IMPLINK AF_IMPLINK
320#define PF_PUP AF_PUP
321#define PF_CHAOS AF_CHAOS
322#define PF_NS AF_NS
323#define PF_ISO AF_ISO
324#define PF_OSI AF_ISO
325#define PF_ECMA AF_ECMA
326#define PF_DATAKIT AF_DATAKIT
327#define PF_CCITT AF_CCITT
328#define PF_SNA AF_SNA
329#define PF_DECnet AF_DECnet
330#define PF_DLI AF_DLI
331#define PF_LAT AF_LAT
332#define PF_HYLINK AF_HYLINK
333#define PF_APPLETALK AF_APPLETALK
334#define PF_OROUTE AF_OROUTE
335#define PF_LINK AF_LINK
336#if defined(_NETBSD_SOURCE)
337#define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
338#endif
339#define PF_COIP AF_COIP
340#define PF_CNT AF_CNT
341#define PF_INET6 AF_INET6
342#define PF_IPX AF_IPX /* same format as AF_NS */
343#if defined(_NETBSD_SOURCE)
344#define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
345#define PF_PIP pseudo_AF_PIP
346#endif
347#define PF_ISDN AF_ISDN /* same as E164 */
348#define PF_E164 AF_E164
349#define PF_NATM AF_NATM
350#define PF_ARP AF_ARP
351#if defined(_NETBSD_SOURCE)
352#define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */
353#endif
354#define PF_BLUETOOTH AF_BLUETOOTH
355#define PF_MPLS AF_MPLS
356#define PF_ROUTE AF_ROUTE
357#define PF_CAN AF_CAN
358#define PF_ETHER AF_ETHER
359
360#define PF_MAX AF_MAX
361
362#if defined(_NETBSD_SOURCE)
363
364#ifndef pid_t
365typedef __pid_t pid_t; /* process id */
366#define pid_t __pid_t
367#endif
368
369#ifndef gid_t
370typedef __gid_t gid_t; /* group id */
371#define gid_t __gid_t
372#endif
373
374#ifndef uid_t
375typedef __uid_t uid_t; /* user id */
376#define uid_t __uid_t
377#endif
378
379/*
380 * Socket credentials.
381 */
382struct sockcred {
383 pid_t sc_pid; /* process id */
384 uid_t sc_uid; /* real user id */
385 uid_t sc_euid; /* effective user id */
386 gid_t sc_gid; /* real group id */
387 gid_t sc_egid; /* effective group id */
388 int sc_ngroups; /* number of supplemental groups */
389 gid_t sc_groups[1]; /* variable length */
390};
391
392/*
393 * Compute size of a sockcred structure with groups.
394 *
395 * The (ngrps - 1) is to account for struct sockcred being defined with
396 * already one group member. This code works correctly when ngroups == 0
397 * because of unsigned arithmetic wrap-around.
398 */
399#define SOCKCREDSIZE(ngrps) \
400 (/*LINTED*/sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
401#endif /* _NETBSD_SOURCE */
402
403
404#if defined(_NETBSD_SOURCE)
405/* Definition for CTL_NET PCB fetching sysctls */
406struct kinfo_pcb {
407 __uint64_t ki_pcbaddr; /* PTR: pcb addr */
408 __uint64_t ki_ppcbaddr; /* PTR: ppcb addr */
409 __uint64_t ki_sockaddr; /* PTR: socket addr */
410
411 __uint32_t ki_family; /* INT: protocol family */
412 __uint32_t ki_type; /* INT: socket type */
413 __uint32_t ki_protocol; /* INT: protocol */
414 __uint32_t ki_pflags; /* INT: generic protocol flags */
415
416 __uint32_t ki_sostate; /* INT: socket state */
417 __uint32_t ki_prstate; /* INT: protocol state */
418 __int32_t ki_tstate; /* INT: tcp state */
419 __uint32_t ki_tflags; /* INT: tcp flags */
420
421 __uint64_t ki_rcvq; /* U_LONG: receive queue len */
422 __uint64_t ki_sndq; /* U_LONG: send queue len */
423
424 union {
425 struct sockaddr _kis_src; /* STRUCT: local address */
426 char _kis_pad[256 + 8]; /* pad to max addr length */
427 } ki_s;
428 union {
429 struct sockaddr _kid_dst; /* STRUCT: remote address */
430 char _kid_pad[256 + 8]; /* pad to max addr length */
431 } ki_d;
432
433 __uint64_t ki_inode; /* INO_T: fake inode number */
434 __uint64_t ki_vnode; /* PTR: if associated with file */
435 __uint64_t ki_conn; /* PTR: control block of peer */
436 __uint64_t ki_refs; /* PTR: referencing socket */
437 __uint64_t ki_nextref; /* PTR: link in refs list */
438};
439
440#define ki_src ki_s._kis_src
441#define ki_dst ki_d._kid_dst
442#define ki_spad ki_s._kis_pad
443#define ki_dpad ki_d._kid_pad
444
445#define PCB_SLOP 20
446#define PCB_ALL 0
447
448#endif /* _NETBSD_SOURCE */
449
450#if defined(_NETBSD_SOURCE)
451/*
452 * PF_ROUTE - Routing table
453 *
454 * Three additional levels are defined:
455 * Fourth: address family, 0 is wildcard
456 * Fifth: type of info, defined below
457 * Sixth: flag(s) to mask with for NET_RT_FLAGS
458 */
459#define NET_RT_DUMP 1 /* dump; may limit to a.f. */
460#define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
461#define NET_RT_OOOIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */
462#define NET_RT_OOIFLIST 4 /* old NET_RT_IFLIST (pre-64bit time) */
463#define NET_RT_OIFLIST 5 /* old NET_RT_IFLIST (pre 8.0) */
464#define NET_RT_IFLIST 6 /* survey interface list */
465
466#endif /* _NETBSD_SOURCE */
467
468/*
469 * Maximum queue length specifiable by listen(2).
470 */
471#ifndef SOMAXCONN
472#define SOMAXCONN 128
473#endif
474
475#include <sys/cdefs.h>
476
477/*
478 * Message header for recvmsg and sendmsg calls.
479 * Used value-result for recvmsg, value only for sendmsg.
480 */
481struct msghdr {
482 void *msg_name; /* optional address */
483 socklen_t msg_namelen; /* size of address */
484 struct iovec *msg_iov; /* scatter/gather array */
485 int msg_iovlen; /* # elements in msg_iov */
486 void *msg_control; /* ancillary data, see below */
487 socklen_t msg_controllen; /* ancillary data buffer len */
488 int msg_flags; /* flags on received message */
489};
490
491#define MSG_OOB 0x0001 /* process out-of-band data */
492#define MSG_PEEK 0x0002 /* peek at incoming message */
493#define MSG_DONTROUTE 0x0004 /* send without using routing tables */
494#define MSG_EOR 0x0008 /* data completes record */
495#define MSG_TRUNC 0x0010 /* data discarded before delivery */
496#define MSG_CTRUNC 0x0020 /* control data lost before delivery */
497#define MSG_WAITALL 0x0040 /* wait for full request or error */
498#define MSG_DONTWAIT 0x0080 /* this message should be nonblocking */
499#define MSG_BCAST 0x0100 /* this message was rcvd using link-level brdcst */
500#define MSG_MCAST 0x0200 /* this message was rcvd using link-level mcast */
501#define MSG_NOSIGNAL 0x0400 /* do not generate SIGPIPE on EOF */
502#if defined(_NETBSD_SOURCE)
503#define MSG_CMSG_CLOEXEC 0x0800 /* close on exec receiving fd */
504#define MSG_NBIO 0x1000 /* use non-blocking I/O */
505#define MSG_WAITFORONE 0x2000 /* recvmmsg() wait for one message */
506#define MSG_NOTIFICATION 0x4000 /* SCTP notification */
507#define MSG_CMSG_CLOFORK 0x8000 /* close on fork receiving fd */
508
509struct mmsghdr {
510 struct msghdr msg_hdr;
511 unsigned int msg_len;
512};
513#endif
514
515/* Extra flags used internally only */
516#define MSG_USERFLAGS 0x0ffffff
517#define MSG_NAMEMBUF 0x1000000 /* msg_name is an mbuf */
518#define MSG_CONTROLMBUF 0x2000000 /* msg_control is an mbuf */
519#define MSG_IOVUSRSPACE 0x4000000 /* msg_iov is in user space */
520#define MSG_LENUSRSPACE 0x8000000 /* address length is in user space */
521
522/*
523 * Header for ancillary data objects in msg_control buffer.
524 * Used for additional information with/about a datagram
525 * not expressible by flags. The format is a sequence
526 * of message elements headed by cmsghdr structures.
527 */
528struct cmsghdr {
529 socklen_t cmsg_len; /* data byte count, including hdr */
530 int cmsg_level; /* originating protocol */
531 int cmsg_type; /* protocol-specific type */
532/* followed by unsigned char cmsg_data[]; */
533};
534
535/*
536 * Alignment requirement for CMSG struct manipulation.
537 * This basically behaves the same as ALIGN() ARCH/include/param.h.
538 * We declare it separately for two reasons:
539 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
540 * idea of ALIGNBYTES at runtime.
541 * without (2), we can't guarantee binary compatibility in case of future
542 * changes in ALIGNBYTES.
543 */
544#define __CMSG_ALIGN(n) (((n) + __ALIGNBYTES) & ~__ALIGNBYTES)
545
546#ifdef _KERNEL
547#define CMSG_ALIGN(n) __CMSG_ALIGN(n)
548#endif
549
550#define __CMSG_ASIZE __CMSG_ALIGN(sizeof(struct cmsghdr))
551#define __CMSG_MSGNEXT(cmsg) \
552 (__CASTV(char *, cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len))
553#define __CMSG_MSGEND(mhdr) \
554 (__CASTV(char *, (mhdr)->msg_control) + (mhdr)->msg_controllen)
555
556/* given pointer to struct cmsghdr, return pointer to data */
557#define CMSG_DATA(cmsg) (__CASTV(unsigned char *, cmsg) + __CMSG_ASIZE)
558#define CCMSG_DATA(cmsg) (__CASTCV(const unsigned char *, cmsg) + __CMSG_ASIZE)
559
560/* given pointer to struct cmsghdr, return pointer to next cmsghdr */
561#define CMSG_NXTHDR(mhdr, cmsg) \
562 __CASTV(struct cmsghdr *, \
563 __CMSG_MSGNEXT(cmsg) + __CMSG_ASIZE > __CMSG_MSGEND(mhdr) ? 0 : \
564 __CMSG_MSGNEXT(cmsg))
565
566/*
567 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
568 * an empty list for some reasons.
569 */
570#define CMSG_FIRSTHDR(mhdr) \
571 __CASTV(struct cmsghdr *, \
572 (mhdr)->msg_controllen < sizeof(struct cmsghdr) ? 0 : \
573 (mhdr)->msg_control)
574
575#define CMSG_SPACE(l) (__CMSG_ASIZE + __CMSG_ALIGN(l))
576#define CMSG_LEN(l) (__CMSG_ASIZE + (l))
577
578/* "Socket"-level control message types: */
579#define SCM_RIGHTS 0x01 /* access rights (array of int) */
580#if defined(_NETBSD_SOURCE)
581/* 0x02 timestamp (struct timeval50) */
582/* 0x04 credentials (struct sockcred70) */
583#define SCM_TIMESTAMP 0x08 /* timestamp (struct timeval) */
584#define SCM_CREDS 0x10 /* credentials (struct sockcred) */
585#endif
586
587/*
588 * Types of socket shutdown(2).
589 */
590#define SHUT_RD 0 /* Disallow further receives. */
591#define SHUT_WR 1 /* Disallow further sends. */
592#define SHUT_RDWR 2 /* Disallow further sends/receives. */
593
594#ifdef _KERNEL
595static __inline socklen_t
596sockaddr_getlen(const struct sockaddr *sa)
597{
598 return sa->sa_len;
599}
600
601__BEGIN_DECLS
602socklen_t sockaddr_getsize_by_family(sa_family_t);
603struct sockaddr *sockaddr_copy(struct sockaddr *, socklen_t,
604 const struct sockaddr *);
605struct sockaddr *sockaddr_externalize(struct sockaddr *, socklen_t,
606 const struct sockaddr *);
607struct sockaddr *sockaddr_alloc(sa_family_t, socklen_t, int);
608const void *sockaddr_const_addr(const struct sockaddr *, socklen_t *);
609void *sockaddr_addr(struct sockaddr *, socklen_t *);
610const struct sockaddr *sockaddr_any(const struct sockaddr *);
611const struct sockaddr *sockaddr_any_by_family(sa_family_t);
612const void *sockaddr_anyaddr(const struct sockaddr *, socklen_t *);
613int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *);
614struct sockaddr *sockaddr_dup(const struct sockaddr *, int);
615int sockaddr_format(const struct sockaddr *, char *, size_t);
616void sockaddr_free(struct sockaddr *);
617__END_DECLS
618#endif /* _KERNEL */
619
620#ifndef _KERNEL
621
622__BEGIN_DECLS
623int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
624int accept4(int, struct sockaddr * __restrict, socklen_t * __restrict, int);
625int bind(int, const struct sockaddr *, socklen_t);
626int connect(int, const struct sockaddr *, socklen_t);
627int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
628int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
629int getsockopt(int, int, int, void *__restrict, socklen_t * __restrict);
630int getsockopt2(int, int, int, void *__restrict, socklen_t * __restrict);
631int listen(int, int);
632int paccept(int, struct sockaddr * __restrict, socklen_t * __restrict,
633 const sigset_t * __restrict, int);
634ssize_t recv(int, void *, size_t, int);
635ssize_t recvfrom(int, void *__restrict, size_t, int,
636 struct sockaddr * __restrict, socklen_t * __restrict);
637ssize_t recvmsg(int, struct msghdr *, int);
638ssize_t send(int, const void *, size_t, int);
639ssize_t sendto(int, const void *,
640 size_t, int, const struct sockaddr *, socklen_t);
641ssize_t sendmsg(int, const struct msghdr *, int);
642int setsockopt(int, int, int, const void *, socklen_t);
643int shutdown(int, int);
644int sockatmark(int);
645int socket(int, int, int)
646#if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)
647__RENAME(__socket30)
648#endif
649 ;
650int socketpair(int, int, int, int *);
651
652#if defined(_NETBSD_SOURCE)
653int sendmmsg(int, struct mmsghdr *, unsigned int, unsigned int);
654struct timespec;
655int recvmmsg(int, struct mmsghdr *, unsigned int, unsigned int,
656 struct timespec *);
657#endif
658__END_DECLS
659#endif /* !_KERNEL */
660
661#endif /* !_SYS_SOCKET_H_ */