FreeBSD/Linux Kernel Cross Reference
sys/sys/socket.h
1 /* $OpenBSD: socket.h,v 1.105 2022/09/03 21:13:48 mbuhl Exp $ */
2 /* $NetBSD: socket.h,v 1.14 1996/02/09 18:25:36 christos Exp $ */
3
4 /*
5 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)socket.h 8.4 (Berkeley) 2/21/94
33 */
34
35 #ifndef _SYS_SOCKET_H_
36 #define _SYS_SOCKET_H_
37
38 /* get the definitions for struct iovec, size_t, ssize_t, and <sys/cdefs.h> */
39 #include <sys/uio.h>
40
41 #if __BSD_VISIBLE
42 #include <sys/types.h> /* for off_t, uid_t, and gid_t */
43 #endif
44
45 #ifndef _SOCKLEN_T_DEFINED_
46 #define _SOCKLEN_T_DEFINED_
47 typedef __socklen_t socklen_t; /* length type for network syscalls */
48 #endif
49
50 #ifndef _SA_FAMILY_T_DEFINED_
51 #define _SA_FAMILY_T_DEFINED_
52 typedef __sa_family_t sa_family_t; /* sockaddr address family type */
53 #endif
54
55
56 /*
57 * Definitions related to sockets: types, address families, options.
58 */
59
60 /*
61 * Types
62 */
63 #define SOCK_STREAM 1 /* stream socket */
64 #define SOCK_DGRAM 2 /* datagram socket */
65 #define SOCK_RAW 3 /* raw-protocol interface */
66 #define SOCK_RDM 4 /* reliably-delivered message */
67 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
68 #ifdef _KERNEL
69 #define SOCK_TYPE_MASK 0x000F /* mask that covers the above */
70 #endif
71
72 /*
73 * Socket creation flags
74 */
75 #if __BSD_VISIBLE
76 #define SOCK_CLOEXEC 0x8000 /* set FD_CLOEXEC */
77 #define SOCK_NONBLOCK 0x4000 /* set O_NONBLOCK */
78 #ifdef _KERNEL
79 #define SOCK_NONBLOCK_INHERIT 0x2000 /* inherit O_NONBLOCK from listener */
80 #endif
81 #define SOCK_DNS 0x1000 /* set SS_DNS */
82 #endif /* __BSD_VISIBLE */
83
84 /*
85 * Option flags per-socket.
86 */
87 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
88 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
89 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
90 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
91 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
92 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
93 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
94 #define SO_LINGER 0x0080 /* linger on close if data present */
95 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
96 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
97 #define SO_TIMESTAMP 0x0800 /* timestamp received dgram traffic */
98 #define SO_BINDANY 0x1000 /* allow bind to any address */
99 #define SO_ZEROIZE 0x2000 /* zero out all mbufs sent over socket */
100
101 /*
102 * Additional options, not kept in so_options.
103 */
104 #define SO_SNDBUF 0x1001 /* send buffer size */
105 #define SO_RCVBUF 0x1002 /* receive buffer size */
106 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
107 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
108 #define SO_SNDTIMEO 0x1005 /* send timeout */
109 #define SO_RCVTIMEO 0x1006 /* receive timeout */
110 #define SO_ERROR 0x1007 /* get error status and clear */
111 #define SO_TYPE 0x1008 /* get socket type */
112 #define SO_NETPROC 0x1020 /* multiplex; network processing */
113 #define SO_RTABLE 0x1021 /* routing table to be used */
114 #define SO_PEERCRED 0x1022 /* get connect-time credentials */
115 #define SO_SPLICE 0x1023 /* splice data to other socket */
116 #define SO_DOMAIN 0x1024 /* get socket domain */
117 #define SO_PROTOCOL 0x1025 /* get socket protocol */
118
119 /*
120 * Structure used for manipulating linger option.
121 */
122 struct linger {
123 int l_onoff; /* option on/off */
124 int l_linger; /* linger time */
125 };
126
127 #if __BSD_VISIBLE
128
129 #ifndef _TIMEVAL_DECLARED
130 #define _TIMEVAL_DECLARED
131 struct timeval {
132 time_t tv_sec; /* seconds */
133 suseconds_t tv_usec; /* and microseconds */
134 };
135 #endif
136
137 /*
138 * Structure used for manipulating splice option.
139 */
140 struct splice {
141 int sp_fd; /* drain socket file descriptor */
142 off_t sp_max; /* if set, maximum bytes to splice */
143 struct timeval sp_idle; /* idle timeout */
144 };
145
146 /*
147 * Maximum number of alternate routing tables
148 */
149 #define RT_TABLEID_MAX 255
150 #define RT_TABLEID_BITS 8
151 #define RT_TABLEID_MASK 0xff
152
153 #endif /* __BSD_VISIBLE */
154
155 /*
156 * Level number for (get/set)sockopt() to apply to socket itself.
157 */
158 #define SOL_SOCKET 0xffff /* options for socket level */
159
160 /*
161 * Address families.
162 */
163 #define AF_UNSPEC 0 /* unspecified */
164 #define AF_UNIX 1 /* local to host */
165 #define AF_LOCAL AF_UNIX /* draft POSIX compatibility */
166 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
167 #define AF_IMPLINK 3 /* arpanet imp addresses */
168 #define AF_PUP 4 /* pup protocols: e.g. BSP */
169 #define AF_CHAOS 5 /* mit CHAOS protocols */
170 #define AF_NS 6 /* XEROX NS protocols */
171 #define AF_ISO 7 /* ISO protocols */
172 #define AF_OSI AF_ISO
173 #define AF_ECMA 8 /* european computer manufacturers */
174 #define AF_DATAKIT 9 /* datakit protocols */
175 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
176 #define AF_SNA 11 /* IBM SNA */
177 #define AF_DECnet 12 /* DECnet */
178 #define AF_DLI 13 /* DEC Direct data link interface */
179 #define AF_LAT 14 /* LAT */
180 #define AF_HYLINK 15 /* NSC Hyperchannel */
181 #define AF_APPLETALK 16 /* Apple Talk */
182 #define AF_ROUTE 17 /* Internal Routing Protocol */
183 #define AF_LINK 18 /* Link layer interface */
184 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
185 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
186 #define AF_CNT 21 /* Computer Network Technology */
187 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
188 #define AF_IPX 23 /* Novell Internet Protocol */
189 #define AF_INET6 24 /* IPv6 */
190 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
191 #define AF_ISDN 26 /* Integrated Services Digital Network*/
192 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
193 #define AF_NATM 27 /* native ATM access */
194 #define AF_ENCAP 28
195 #define AF_SIP 29 /* Simple Internet Protocol */
196 #define AF_KEY 30
197 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
198 in interface output routine */
199 #define AF_BLUETOOTH 32 /* Bluetooth */
200 #define AF_MPLS 33 /* MPLS */
201 #define pseudo_AF_PFLOW 34 /* pflow */
202 #define pseudo_AF_PIPEX 35 /* PIPEX */
203 #define AF_MAX 36
204
205 /*
206 * Structure used by kernel to store most
207 * addresses.
208 */
209 struct sockaddr {
210 __uint8_t sa_len; /* total length */
211 sa_family_t sa_family; /* address family */
212 char sa_data[14]; /* actually longer; address value */
213 };
214
215 /*
216 * Sockaddr type which can hold any sockaddr type available
217 * in the system.
218 *
219 * Note: __ss_{len,family} is defined in RFC2553. During RFC2553 discussion
220 * the field name went back and forth between ss_len and __ss_len,
221 * and RFC2553 specifies it to be __ss_len. openbsd picked ss_len.
222 * For maximum portability, userland programmer would need to
223 * (1) make the code never touch ss_len portion (cast it into sockaddr and
224 * touch sa_len), or (2) add "-Dss_len=__ss_len" into CFLAGS to unify all
225 * occurrences (including header file) to __ss_len.
226 */
227 struct sockaddr_storage {
228 __uint8_t ss_len; /* total length */
229 sa_family_t ss_family; /* address family */
230 unsigned char __ss_pad1[6]; /* align to quad */
231 __uint64_t __ss_pad2; /* force alignment for stupid compilers */
232 unsigned char __ss_pad3[240]; /* pad to a total of 256 bytes */
233 };
234
235 #ifdef _KERNEL
236 /*
237 * Structure used by kernel to pass protocol
238 * information in raw sockets.
239 */
240 struct sockproto {
241 unsigned short sp_family; /* address family */
242 unsigned short sp_protocol; /* protocol */
243 };
244 #endif /* _KERNEL */
245
246 /*
247 * Protocol families, same as address families for now.
248 */
249 #define PF_UNSPEC AF_UNSPEC
250 #define PF_LOCAL AF_LOCAL
251 #define PF_UNIX AF_UNIX
252 #define PF_INET AF_INET
253 #define PF_IMPLINK AF_IMPLINK
254 #define PF_PUP AF_PUP
255 #define PF_CHAOS AF_CHAOS
256 #define PF_NS AF_NS
257 #define PF_ISO AF_ISO
258 #define PF_OSI AF_ISO
259 #define PF_ECMA AF_ECMA
260 #define PF_DATAKIT AF_DATAKIT
261 #define PF_CCITT AF_CCITT
262 #define PF_SNA AF_SNA
263 #define PF_DECnet AF_DECnet
264 #define PF_DLI AF_DLI
265 #define PF_LAT AF_LAT
266 #define PF_HYLINK AF_HYLINK
267 #define PF_APPLETALK AF_APPLETALK
268 #define PF_ROUTE AF_ROUTE
269 #define PF_LINK AF_LINK
270 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
271 #define PF_COIP AF_COIP
272 #define PF_CNT AF_CNT
273 #define PF_IPX AF_IPX /* same format as AF_NS */
274 #define PF_INET6 AF_INET6
275 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
276 #define PF_PIP pseudo_AF_PIP
277 #define PF_ISDN AF_ISDN
278 #define PF_NATM AF_NATM
279 #define PF_ENCAP AF_ENCAP
280 #define PF_SIP AF_SIP
281 #define PF_KEY AF_KEY
282 #define PF_BPF pseudo_AF_HDRCMPLT
283 #define PF_BLUETOOTH AF_BLUETOOTH
284 #define PF_MPLS AF_MPLS
285 #define PF_PFLOW pseudo_AF_PFLOW
286 #define PF_PIPEX pseudo_AF_PIPEX
287 #define PF_MAX AF_MAX
288
289 /*
290 * These are the valid values for the "how" field used by shutdown(2).
291 */
292 #define SHUT_RD 0
293 #define SHUT_WR 1
294 #define SHUT_RDWR 2
295
296 #if __BSD_VISIBLE
297 #define SA_LEN(x) ((x)->sa_len)
298
299 /* Read using getsockopt() with SOL_SOCKET, SO_PEERCRED */
300 struct sockpeercred {
301 uid_t uid; /* effective user id */
302 gid_t gid; /* effective group id */
303 pid_t pid;
304 };
305
306 /*
307 * Definitions for network related sysctl, CTL_NET.
308 *
309 * Second level is protocol family.
310 * Third level is protocol number.
311 *
312 * Further levels are defined by the individual families below.
313 */
314 #define NET_MAXID AF_MAX
315
316 #define CTL_NET_NAMES { \
317 { 0, 0 }, \
318 { "unix", CTLTYPE_NODE }, \
319 { "inet", CTLTYPE_NODE }, \
320 { "implink", CTLTYPE_NODE }, \
321 { "pup", CTLTYPE_NODE }, \
322 { "chaos", CTLTYPE_NODE }, \
323 { "xerox_ns", CTLTYPE_NODE }, \
324 { "iso", CTLTYPE_NODE }, \
325 { "ecma", CTLTYPE_NODE }, \
326 { "datakit", CTLTYPE_NODE }, \
327 { "ccitt", CTLTYPE_NODE }, \
328 { "ibm_sna", CTLTYPE_NODE }, \
329 { "decnet", CTLTYPE_NODE }, \
330 { "dec_dli", CTLTYPE_NODE }, \
331 { "lat", CTLTYPE_NODE }, \
332 { "hylink", CTLTYPE_NODE }, \
333 { "appletalk", CTLTYPE_NODE }, \
334 { "route", CTLTYPE_NODE }, \
335 { "link", CTLTYPE_NODE }, \
336 { "xtp", CTLTYPE_NODE }, \
337 { "coip", CTLTYPE_NODE }, \
338 { "cnt", CTLTYPE_NODE }, \
339 { "rtip", CTLTYPE_NODE }, \
340 { "ipx", CTLTYPE_NODE }, \
341 { "inet6", CTLTYPE_NODE }, \
342 { "pip", CTLTYPE_NODE }, \
343 { "isdn", CTLTYPE_NODE }, \
344 { "natm", CTLTYPE_NODE }, \
345 { "encap", CTLTYPE_NODE }, \
346 { "sip", CTLTYPE_NODE }, \
347 { "key", CTLTYPE_NODE }, \
348 { "bpf", CTLTYPE_NODE }, \
349 { "bluetooth", CTLTYPE_NODE }, \
350 { "mpls", CTLTYPE_NODE }, \
351 { "pflow", CTLTYPE_NODE }, \
352 { "pipex", CTLTYPE_NODE }, \
353 }
354
355 /*
356 * PF_ROUTE - Routing table
357 *
358 * Four additional levels are defined:
359 * Fourth: address family, 0 is wildcard
360 * Fifth: type of info, defined below
361 * Sixth: flag(s) to mask with for NET_RT_FLAGS
362 * Seventh: routing table to use (facultative, defaults to 0)
363 * NET_RT_TABLE has the table id as sixth element.
364 */
365 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
366 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
367 #define NET_RT_IFLIST 3 /* survey interface list */
368 #define NET_RT_STATS 4 /* routing table statistics */
369 #define NET_RT_TABLE 5
370 #define NET_RT_IFNAMES 6
371 #define NET_RT_SOURCE 7
372 #define NET_RT_MAXID 8
373
374 #define CTL_NET_RT_NAMES { \
375 { 0, 0 }, \
376 { "dump", CTLTYPE_STRUCT }, \
377 { "flags", CTLTYPE_STRUCT }, \
378 { "iflist", CTLTYPE_STRUCT }, \
379 { "stats", CTLTYPE_STRUCT }, \
380 { "table", CTLTYPE_STRUCT }, \
381 { "ifnames", CTLTYPE_STRUCT }, \
382 { "source", CTLTYPE_STRUCT }, \
383 }
384
385 /*
386 * PF_UNIX - unix socket tunables
387 */
388 #define NET_UNIX_INFLIGHT 6
389 #define NET_UNIX_DEFERRED 7
390 #define NET_UNIX_MAXID 8
391
392 #define CTL_NET_UNIX_NAMES { \
393 { 0, 0 }, \
394 { "stream", CTLTYPE_NODE }, \
395 { "dgram", CTLTYPE_NODE }, \
396 { 0, 0 }, \
397 { 0, 0 }, \
398 { "seqpacket", CTLTYPE_NODE }, \
399 { "inflight", CTLTYPE_INT }, \
400 { "deferred", CTLTYPE_INT }, \
401 }
402
403 #define UNPCTL_RECVSPACE 1
404 #define UNPCTL_SENDSPACE 2
405 #define NET_UNIX_PROTO_MAXID 3
406
407 #define CTL_NET_UNIX_PROTO_NAMES { \
408 { 0, 0 }, \
409 { "recvspace", CTLTYPE_INT }, \
410 { "sendspace", CTLTYPE_INT }, \
411 }
412
413 /*
414 * PF_LINK - link layer or device tunables
415 */
416 #define NET_LINK_IFRXQ 1 /* net.link.ifrxq */
417 #define NET_LINK_MAXID 2
418
419 #define CTL_NET_LINK_NAMES { \
420 { 0, 0 }, \
421 { "ifrxq", CTLTYPE_NODE }, \
422 }
423
424 #define NET_LINK_IFRXQ_PRESSURE_RETURN \
425 1 /* net.link.ifrxq.pressure_return */
426 #define NET_LINK_IFRXQ_PRESSURE_DROP \
427 2 /* net.link.ifrxq.pressure_drop */
428 #define NET_LINK_IFRXQ_MAXID 3
429
430 #define CTL_NET_LINK_IFRXQ_NAMES { \
431 { 0, 0 }, \
432 { "pressure_return", CTLTYPE_INT }, \
433 { "pressure_drop", CTLTYPE_INT }, \
434 }
435
436 /*
437 * PF_KEY - Key Management
438 */
439 #define NET_KEY_SADB_DUMP 1 /* return SADB */
440 #define NET_KEY_SPD_DUMP 2 /* return SPD */
441 #define NET_KEY_MAXID 3
442
443 #define CTL_NET_KEY_NAMES { \
444 { 0, 0 }, \
445 { "sadb_dump", CTLTYPE_STRUCT }, \
446 { "spd_dump", CTLTYPE_STRUCT }, \
447 }
448
449 /*
450 * PF_BPF not really a family, but connected under CTL_NET
451 */
452 #define NET_BPF_BUFSIZE 1 /* default buffer size */
453 #define NET_BPF_MAXBUFSIZE 2 /* maximum buffer size */
454 #define NET_BPF_MAXID 3
455
456 #define CTL_NET_BPF_NAMES { \
457 { 0, 0 }, \
458 { "bufsize", CTLTYPE_INT }, \
459 { "maxbufsize", CTLTYPE_INT }, \
460 }
461
462 /*
463 * PF_PFLOW not really a family, but connected under CTL_NET
464 */
465 #define NET_PFLOW_STATS 1 /* statistics */
466 #define NET_PFLOW_MAXID 2
467
468 #define CTL_NET_PFLOW_NAMES { \
469 { 0, 0 }, \
470 { "stats", CTLTYPE_STRUCT }, \
471 }
472 #endif /* __BSD_VISIBLE */
473
474 /*
475 * Maximum queue length specifiable by listen(2).
476 */
477 #define SOMAXCONN 128
478
479 /*
480 * Message header for recvmsg and sendmsg calls.
481 * Used value-result for recvmsg, value only for sendmsg.
482 */
483 struct msghdr {
484 void *msg_name; /* optional address */
485 socklen_t msg_namelen; /* size of address */
486 struct iovec *msg_iov; /* scatter/gather array */
487 unsigned int msg_iovlen; /* # elements in msg_iov */
488 void *msg_control; /* ancillary data, see below */
489 socklen_t msg_controllen; /* ancillary data buffer len */
490 int msg_flags; /* flags on received message */
491 };
492
493 struct mmsghdr {
494 struct msghdr msg_hdr;
495 unsigned int msg_len;
496 };
497
498 struct timespec;
499
500 #define MSG_OOB 0x1 /* process out-of-band data */
501 #define MSG_PEEK 0x2 /* peek at incoming message */
502 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
503 #define MSG_EOR 0x8 /* data completes record */
504 #define MSG_TRUNC 0x10 /* data discarded before delivery */
505 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
506 #define MSG_WAITALL 0x40 /* wait for full request or error */
507 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
508 #define MSG_BCAST 0x100 /* this message rec'd as broadcast */
509 #define MSG_MCAST 0x200 /* this message rec'd as multicast */
510 #define MSG_NOSIGNAL 0x400 /* do not send SIGPIPE */
511 #define MSG_CMSG_CLOEXEC 0x800 /* set FD_CLOEXEC on received fds */
512 #define MSG_WAITFORONE 0x1000 /* nonblocking but wait for one msg */
513
514 /*
515 * Header for ancillary data objects in msg_control buffer.
516 * Used for additional information with/about a datagram
517 * not expressible by flags. The format is a sequence
518 * of message elements headed by cmsghdr structures.
519 */
520 struct cmsghdr {
521 socklen_t cmsg_len; /* data byte count, including hdr */
522 int cmsg_level; /* originating protocol */
523 int cmsg_type; /* protocol-specific type */
524 /* followed by u_char cmsg_data[]; */
525 };
526
527 /* given pointer to struct cmsghdr, return pointer to data */
528 #define CMSG_DATA(cmsg) \
529 ((unsigned char *)(cmsg) + _ALIGN(sizeof(struct cmsghdr)))
530
531 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
532 #define CMSG_NXTHDR(mhdr, cmsg) \
533 (((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
534 _ALIGN(sizeof(struct cmsghdr)) > \
535 ((char *)(mhdr)->msg_control) + (mhdr)->msg_controllen) ? \
536 (struct cmsghdr *)NULL : \
537 (struct cmsghdr *)((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
538
539 /*
540 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
541 * an empty list for some reasons.
542 */
543 #define CMSG_FIRSTHDR(mhdr) \
544 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
545 (struct cmsghdr *)(mhdr)->msg_control : \
546 (struct cmsghdr *)NULL)
547
548 /* Round len up to next alignment boundary */
549 #ifdef _KERNEL
550 #define CMSG_ALIGN(n) _ALIGN(n)
551 #endif
552
553 /* Length of the contents of a control message of length len */
554 #define CMSG_LEN(len) (_ALIGN(sizeof(struct cmsghdr)) + (len))
555
556 /* Length of the space taken up by a padded control message of length len */
557 #define CMSG_SPACE(len) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(len))
558
559 /* "Socket"-level control message types: */
560 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
561 #define SCM_TIMESTAMP 0x04 /* timestamp (struct timeval) */
562
563 #ifndef _KERNEL
564
565 __BEGIN_DECLS
566 int accept(int, struct sockaddr *, socklen_t *);
567 int bind(int, const struct sockaddr *, socklen_t);
568 int connect(int, const struct sockaddr *, socklen_t);
569 int getpeername(int, struct sockaddr *, socklen_t *);
570 int getsockname(int, struct sockaddr *, socklen_t *);
571 int getsockopt(int, int, int, void *, socklen_t *);
572 int listen(int, int);
573 ssize_t recv(int, void *, size_t, int);
574 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
575 ssize_t recvmsg(int, struct msghdr *, int);
576 int recvmmsg(int, struct mmsghdr *, unsigned int, int, struct timespec *);
577 ssize_t send(int, const void *, size_t, int);
578 ssize_t sendto(int, const void *,
579 size_t, int, const struct sockaddr *, socklen_t);
580 ssize_t sendmsg(int, const struct msghdr *, int);
581 int sendmmsg(int, struct mmsghdr *, unsigned int, int);
582 int setsockopt(int, int, int, const void *, socklen_t);
583 int shutdown(int, int);
584 int sockatmark(int);
585 int socket(int, int, int);
586 int socketpair(int, int, int, int *);
587
588 #if __BSD_VISIBLE
589 int accept4(int, struct sockaddr *__restrict, socklen_t *__restrict, int);
590 #endif
591
592 #if __BSD_VISIBLE
593 int getpeereid(int, uid_t *, gid_t *);
594 int getrtable(void);
595 int setrtable(int);
596 #endif /* __BSD_VISIBLE */
597
598 __END_DECLS
599
600 #else
601
602 static inline struct sockaddr *
603 sstosa(struct sockaddr_storage *ss)
604 {
605 return ((struct sockaddr *)(ss));
606 }
607
608 #endif /* !_KERNEL */
609
610 #endif /* !_SYS_SOCKET_H_ */
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