1 /* $NetBSD: socket.h,v 1.132 2024/01/22 18:50:46 christos 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
78 typedef __sa_family_t sa_family_t;
79 #define sa_family_t __sa_family_t
80 #endif
81
82 #ifndef socklen_t
83 typedef __socklen_t socklen_t;
84 #define socklen_t __socklen_t
85 #endif
86
87 #include <machine/ansi.h>
88
89 #ifdef _BSD_SIZE_T_
90 typedef _BSD_SIZE_T_ size_t;
91 #undef _BSD_SIZE_T_
92 #endif
93
94 #ifdef _BSD_SSIZE_T_
95 typedef _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_FLAGS_MASK 0xf0000000 /* flags mask */
117
118 /*
119 * Option flags per-socket.
120 */
121 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
122 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
123 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
124 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
125 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
126 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
127 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
128 #define SO_LINGER 0x0080 /* linger on close if data present */
129 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
130 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
131 /* SO_OTIMESTAMP 0x0400 */
132 #define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
133 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
134 #define SO_TIMESTAMP 0x2000 /* timestamp received dgram traffic */
135 #define SO_RERROR 0x4000 /* Keep track of receive errors */
136
137 /* Allowed default option flags */
138 #define SO_DEFOPTS (SO_DEBUG|SO_REUSEADDR|SO_KEEPALIVE|SO_DONTROUTE| \
139 SO_BROADCAST|SO_USELOOPBACK|SO_LINGER|SO_OOBINLINE|SO_REUSEPORT| \
140 SO_NOSIGPIPE|SO_TIMESTAMP|SO_RERROR)
141
142 #define __SO_OPTION_BITS \
143 "\20" \
144 "\1SO_DEBUG" \
145 "\2SO_ACCEPTCONN" \
146 "\3SO_REUSEADDR" \
147 "\4SO_KEEPALIVE" \
148 "\5SO_DONTROUTE" \
149 "\6SO_BROADCAST" \
150 "\7SO_USELOOPBACK" \
151 "\10SO_LINGER" \
152 "\11SO_OOBINLINE" \
153 "\12SO_REUSEPORT" \
154 "\13SO_OTIMESTAMP" \
155 "\14SO_NOSIGPIPE" \
156 "\15SO_ACCEPTFILTER" \
157 "\16SO_TIMESTAMP" \
158 "\17SO_RERROR"
159
160 /*
161 * Additional options, not kept in so_options.
162 */
163 #define SO_SNDBUF 0x1001 /* send buffer size */
164 #define SO_RCVBUF 0x1002 /* receive buffer size */
165 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
166 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
167 /* SO_OSNDTIMEO 0x1005 */
168 /* SO_ORCVTIMEO 0x1006 */
169 #define SO_ERROR 0x1007 /* get error status and clear */
170 #define SO_TYPE 0x1008 /* get socket type */
171 #define SO_OVERFLOWED 0x1009 /* datagrams: return packets dropped */
172
173 #define SO_NOHEADER 0x100a /* user supplies no header to kernel;
174 * kernel removes header and supplies
175 * payload
176 */
177 #define SO_SNDTIMEO 0x100b /* send timeout */
178 #define SO_RCVTIMEO 0x100c /* receive timeout */
179 /*
180 * Structure used for manipulating linger option.
181 */
182 struct linger {
183 int l_onoff; /* option on/off */
184 int l_linger; /* linger time in seconds */
185 };
186
187 struct accept_filter_arg {
188 char af_name[16];
189 char af_arg[256-16];
190 };
191
192 /*
193 * Level number for (get/set)sockopt() to apply to socket itself.
194 */
195 #define SOL_SOCKET 0xffff /* options for socket level */
196
197 /*
198 * Address families.
199 */
200 #define AF_UNSPEC 0 /* unspecified */
201 #define AF_LOCAL 1 /* local to host */
202 #define AF_UNIX AF_LOCAL /* backward compatibility */
203 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
204 #define AF_IMPLINK 3 /* arpanet imp addresses */
205 #define AF_PUP 4 /* pup protocols: e.g. BSP */
206 #define AF_CHAOS 5 /* mit CHAOS protocols */
207 #define AF_NS 6 /* XEROX NS protocols */
208 #define AF_ISO 7 /* ISO protocols */
209 #define AF_OSI AF_ISO
210 #define AF_ECMA 8 /* european computer manufacturers */
211 #define AF_DATAKIT 9 /* datakit protocols */
212 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
213 #define AF_SNA 11 /* IBM SNA */
214 #define AF_DECnet 12 /* DECnet */
215 #define AF_DLI 13 /* DEC Direct data link interface */
216 #define AF_LAT 14 /* LAT */
217 #define AF_HYLINK 15 /* NSC Hyperchannel */
218 #define AF_APPLETALK 16 /* Apple Talk */
219 #define AF_OROUTE 17 /* Internal Routing Protocol */
220 #define AF_LINK 18 /* Link layer interface */
221 #if defined(_NETBSD_SOURCE)
222 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
223 #endif
224 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
225 #define AF_CNT 21 /* Computer Network Technology */
226 #if defined(_NETBSD_SOURCE)
227 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
228 #endif
229 #define AF_IPX 23 /* Novell Internet Protocol */
230 #define AF_INET6 24 /* IP version 6 */
231 #if defined(_NETBSD_SOURCE)
232 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
233 #endif
234 #define AF_ISDN 26 /* Integrated Services Digital Network*/
235 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
236 #define AF_NATM 27 /* native ATM access */
237 #define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */
238 #if defined(_NETBSD_SOURCE)
239 #define pseudo_AF_KEY 29 /* Internal key management protocol */
240 #define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs
241 in interface output routine */
242 #endif
243 #define AF_BLUETOOTH 31 /* Bluetooth: HCI, SCO, L2CAP, RFCOMM */
244 #define AF_IEEE80211 32 /* IEEE80211 */
245 #define AF_MPLS 33 /* MultiProtocol Label Switching */
246 #define AF_ROUTE 34 /* Internal Routing Protocol */
247 #define AF_CAN 35
248 #define AF_ETHER 36
249 #define AF_MAX 37
250
251 /*
252 * Structure used by kernel to store most
253 * addresses.
254 */
255 struct sockaddr {
256 __uint8_t sa_len; /* total length */
257 sa_family_t sa_family; /* address family */
258 char sa_data[14]; /* actually longer; address value */
259 };
260
261 #if defined(_KERNEL)
262 /*
263 * Structure used by kernel to pass protocol
264 * information in raw sockets.
265 */
266 struct sockproto {
267 u_short sp_family; /* address family */
268 u_short sp_protocol; /* protocol */
269 };
270
271 /*
272 * we make the entire struct at least UCHAR_MAX + 1 in size since existing
273 * use of sockaddr_un permits a path up to 253 bytes + '\0'.
274 * sizeof(sb_len) + sizeof(sb_family) + 253 + '\0'
275 */
276 #define _SB_DATASIZE 254
277 struct sockaddr_big {
278 union {
279 struct {
280 __uint8_t sb_len;
281 sa_family_t sb_family;
282 char sb_data[_SB_DATASIZE];
283 };
284 uint64_t dummy; /* solicit natural alignment */
285 };
286 };
287
288 #endif /* _KERNEL */
289
290 /*
291 * RFC 2553: protocol-independent placeholder for socket addresses
292 */
293 #define _SS_MAXSIZE 128
294 #define _SS_ALIGNSIZE (sizeof(__int64_t))
295 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2)
296 #define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - _SS_PAD1SIZE - _SS_ALIGNSIZE)
297
298 struct sockaddr_storage {
299 __uint8_t ss_len; /* address length */
300 sa_family_t ss_family; /* address family */
301 char __ss_pad1[_SS_PAD1SIZE];
302 __int64_t __ss_align;/* force desired structure storage alignment */
303 char __ss_pad2[_SS_PAD2SIZE];
304 };
305
306 #if defined(_NETBSD_SOURCE)
307 #define sstosa(__ss) ((struct sockaddr *)(__ss))
308 #define sstocsa(__ss) ((const struct sockaddr *)(__ss))
309 #endif /* _NETBSD_SOURCE */
310
311 /*
312 * Protocol families, same as address families for now.
313 */
314 #define PF_UNSPEC AF_UNSPEC
315 #define PF_LOCAL AF_LOCAL
316 #define PF_UNIX PF_LOCAL /* backward compatibility */
317 #define PF_INET AF_INET
318 #define PF_IMPLINK AF_IMPLINK
319 #define PF_PUP AF_PUP
320 #define PF_CHAOS AF_CHAOS
321 #define PF_NS AF_NS
322 #define PF_ISO AF_ISO
323 #define PF_OSI AF_ISO
324 #define PF_ECMA AF_ECMA
325 #define PF_DATAKIT AF_DATAKIT
326 #define PF_CCITT AF_CCITT
327 #define PF_SNA AF_SNA
328 #define PF_DECnet AF_DECnet
329 #define PF_DLI AF_DLI
330 #define PF_LAT AF_LAT
331 #define PF_HYLINK AF_HYLINK
332 #define PF_APPLETALK AF_APPLETALK
333 #define PF_OROUTE AF_OROUTE
334 #define PF_LINK AF_LINK
335 #if defined(_NETBSD_SOURCE)
336 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
337 #endif
338 #define PF_COIP AF_COIP
339 #define PF_CNT AF_CNT
340 #define PF_INET6 AF_INET6
341 #define PF_IPX AF_IPX /* same format as AF_NS */
342 #if defined(_NETBSD_SOURCE)
343 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
344 #define PF_PIP pseudo_AF_PIP
345 #endif
346 #define PF_ISDN AF_ISDN /* same as E164 */
347 #define PF_E164 AF_E164
348 #define PF_NATM AF_NATM
349 #define PF_ARP AF_ARP
350 #if defined(_NETBSD_SOURCE)
351 #define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */
352 #endif
353 #define PF_BLUETOOTH AF_BLUETOOTH
354 #define PF_MPLS AF_MPLS
355 #define PF_ROUTE AF_ROUTE
356 #define PF_CAN AF_CAN
357 #define PF_ETHER AF_ETHER
358
359 #define PF_MAX AF_MAX
360
361 #if defined(_NETBSD_SOURCE)
362
363 #ifndef pid_t
364 typedef __pid_t pid_t; /* process id */
365 #define pid_t __pid_t
366 #endif
367
368 #ifndef gid_t
369 typedef __gid_t gid_t; /* group id */
370 #define gid_t __gid_t
371 #endif
372
373 #ifndef uid_t
374 typedef __uid_t uid_t; /* user id */
375 #define uid_t __uid_t
376 #endif
377
378 /*
379 * Socket credentials.
380 */
381 struct sockcred {
382 pid_t sc_pid; /* process id */
383 uid_t sc_uid; /* real user id */
384 uid_t sc_euid; /* effective user id */
385 gid_t sc_gid; /* real group id */
386 gid_t sc_egid; /* effective group id */
387 int sc_ngroups; /* number of supplemental groups */
388 gid_t sc_groups[1]; /* variable length */
389 };
390
391 /*
392 * Compute size of a sockcred structure with groups.
393 *
394 * The (ngrps - 1) is to account for struct sockcred being defined with
395 * already one group member. This code works correctly when ngroups == 0
396 * because of unsigned arithmetic wrap-around.
397 */
398 #define SOCKCREDSIZE(ngrps) \
399 (/*LINTED*/sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
400 #endif /* _NETBSD_SOURCE */
401
402
403 #if defined(_NETBSD_SOURCE)
404 /* Definition for CTL_NET PCB fetching sysctls */
405 struct kinfo_pcb {
406 __uint64_t ki_pcbaddr; /* PTR: pcb addr */
407 __uint64_t ki_ppcbaddr; /* PTR: ppcb addr */
408 __uint64_t ki_sockaddr; /* PTR: socket addr */
409
410 __uint32_t ki_family; /* INT: protocol family */
411 __uint32_t ki_type; /* INT: socket type */
412 __uint32_t ki_protocol; /* INT: protocol */
413 __uint32_t ki_pflags; /* INT: generic protocol flags */
414
415 __uint32_t ki_sostate; /* INT: socket state */
416 __uint32_t ki_prstate; /* INT: protocol state */
417 __int32_t ki_tstate; /* INT: tcp state */
418 __uint32_t ki_tflags; /* INT: tcp flags */
419
420 __uint64_t ki_rcvq; /* U_LONG: receive queue len */
421 __uint64_t ki_sndq; /* U_LONG: send queue len */
422
423 union {
424 struct sockaddr _kis_src; /* STRUCT: local address */
425 char _kis_pad[256 + 8]; /* pad to max addr length */
426 } ki_s;
427 union {
428 struct sockaddr _kid_dst; /* STRUCT: remote address */
429 char _kid_pad[256 + 8]; /* pad to max addr length */
430 } ki_d;
431
432 __uint64_t ki_inode; /* INO_T: fake inode number */
433 __uint64_t ki_vnode; /* PTR: if associated with file */
434 __uint64_t ki_conn; /* PTR: control block of peer */
435 __uint64_t ki_refs; /* PTR: referencing socket */
436 __uint64_t ki_nextref; /* PTR: link in refs list */
437 };
438
439 #define ki_src ki_s._kis_src
440 #define ki_dst ki_d._kid_dst
441 #define ki_spad ki_s._kis_pad
442 #define ki_dpad ki_d._kid_pad
443
444 #define PCB_SLOP 20
445 #define PCB_ALL 0
446
447 #endif /* _NETBSD_SOURCE */
448
449 #if defined(_NETBSD_SOURCE)
450 /*
451 * PF_ROUTE - Routing table
452 *
453 * Three additional levels are defined:
454 * Fourth: address family, 0 is wildcard
455 * Fifth: type of info, defined below
456 * Sixth: flag(s) to mask with for NET_RT_FLAGS
457 */
458 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
459 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
460 #define NET_RT_OOOIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */
461 #define NET_RT_OOIFLIST 4 /* old NET_RT_IFLIST (pre-64bit time) */
462 #define NET_RT_OIFLIST 5 /* old NET_RT_IFLIST (pre 8.0) */
463 #define NET_RT_IFLIST 6 /* survey interface list */
464
465 #endif /* _NETBSD_SOURCE */
466
467 /*
468 * Maximum queue length specifiable by listen(2).
469 */
470 #ifndef SOMAXCONN
471 #define SOMAXCONN 128
472 #endif
473
474 #include <sys/cdefs.h>
475
476 /*
477 * Message header for recvmsg and sendmsg calls.
478 * Used value-result for recvmsg, value only for sendmsg.
479 */
480 struct msghdr {
481 void *msg_name; /* optional address */
482 socklen_t msg_namelen; /* size of address */
483 struct iovec *msg_iov; /* scatter/gather array */
484 int msg_iovlen; /* # elements in msg_iov */
485 void *msg_control; /* ancillary data, see below */
486 socklen_t msg_controllen; /* ancillary data buffer len */
487 int msg_flags; /* flags on received message */
488 };
489
490 #define MSG_OOB 0x0001 /* process out-of-band data */
491 #define MSG_PEEK 0x0002 /* peek at incoming message */
492 #define MSG_DONTROUTE 0x0004 /* send without using routing tables */
493 #define MSG_EOR 0x0008 /* data completes record */
494 #define MSG_TRUNC 0x0010 /* data discarded before delivery */
495 #define MSG_CTRUNC 0x0020 /* control data lost before delivery */
496 #define MSG_WAITALL 0x0040 /* wait for full request or error */
497 #define MSG_DONTWAIT 0x0080 /* this message should be nonblocking */
498 #define MSG_BCAST 0x0100 /* this message was rcvd using link-level brdcst */
499 #define MSG_MCAST 0x0200 /* this message was rcvd using link-level mcast */
500 #define MSG_NOSIGNAL 0x0400 /* do not generate SIGPIPE on EOF */
501 #if defined(_NETBSD_SOURCE)
502 #define MSG_CMSG_CLOEXEC 0x0800 /* close on exec receiving fd */
503 #define MSG_NBIO 0x1000 /* use non-blocking I/O */
504 #define MSG_WAITFORONE 0x2000 /* recvmmsg() wait for one message */
505 #define MSG_NOTIFICATION 0x4000 /* SCTP notification */
506
507 struct mmsghdr {
508 struct msghdr msg_hdr;
509 unsigned int msg_len;
510 };
511 #endif
512
513 /* Extra flags used internally only */
514 #define MSG_USERFLAGS 0x0ffffff
515 #define MSG_NAMEMBUF 0x1000000 /* msg_name is an mbuf */
516 #define MSG_CONTROLMBUF 0x2000000 /* msg_control is an mbuf */
517 #define MSG_IOVUSRSPACE 0x4000000 /* msg_iov is in user space */
518 #define MSG_LENUSRSPACE 0x8000000 /* address length is in user space */
519
520 /*
521 * Header for ancillary data objects in msg_control buffer.
522 * Used for additional information with/about a datagram
523 * not expressible by flags. The format is a sequence
524 * of message elements headed by cmsghdr structures.
525 */
526 struct cmsghdr {
527 socklen_t cmsg_len; /* data byte count, including hdr */
528 int cmsg_level; /* originating protocol */
529 int cmsg_type; /* protocol-specific type */
530 /* followed by unsigned char cmsg_data[]; */
531 };
532
533 /*
534 * Alignment requirement for CMSG struct manipulation.
535 * This basically behaves the same as ALIGN() ARCH/include/param.h.
536 * We declare it separately for two reasons:
537 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
538 * idea of ALIGNBYTES at runtime.
539 * without (2), we can't guarantee binary compatibility in case of future
540 * changes in ALIGNBYTES.
541 */
542 #define __CMSG_ALIGN(n) (((n) + __ALIGNBYTES) & ~__ALIGNBYTES)
543
544 #ifdef _KERNEL
545 #define CMSG_ALIGN(n) __CMSG_ALIGN(n)
546 #endif
547
548 #define __CMSG_ASIZE __CMSG_ALIGN(sizeof(struct cmsghdr))
549 #define __CMSG_MSGNEXT(cmsg) \
550 (__CASTV(char *, cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len))
551 #define __CMSG_MSGEND(mhdr) \
552 (__CASTV(char *, (mhdr)->msg_control) + (mhdr)->msg_controllen)
553
554 /* given pointer to struct cmsghdr, return pointer to data */
555 #define CMSG_DATA(cmsg) (__CASTV(unsigned char *, cmsg) + __CMSG_ASIZE)
556 #define CCMSG_DATA(cmsg) (__CASTCV(const unsigned char *, cmsg) + __CMSG_ASIZE)
557
558 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
559 #define CMSG_NXTHDR(mhdr, cmsg) \
560 __CASTV(struct cmsghdr *, \
561 __CMSG_MSGNEXT(cmsg) + __CMSG_ASIZE > __CMSG_MSGEND(mhdr) ? 0 : \
562 __CMSG_MSGNEXT(cmsg))
563
564 /*
565 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
566 * an empty list for some reasons.
567 */
568 #define CMSG_FIRSTHDR(mhdr) \
569 __CASTV(struct cmsghdr *, \
570 (mhdr)->msg_controllen < sizeof(struct cmsghdr) ? 0 : \
571 (mhdr)->msg_control)
572
573 #define CMSG_SPACE(l) (__CMSG_ASIZE + __CMSG_ALIGN(l))
574 #define CMSG_LEN(l) (__CMSG_ASIZE + (l))
575
576 /* "Socket"-level control message types: */
577 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
578 #if defined(_NETBSD_SOURCE)
579 /* 0x02 timestamp (struct timeval50) */
580 /* 0x04 credentials (struct sockcred70) */
581 #define SCM_TIMESTAMP 0x08 /* timestamp (struct timeval) */
582 #define SCM_CREDS 0x10 /* credentials (struct sockcred) */
583 #endif
584
585 /*
586 * Types of socket shutdown(2).
587 */
588 #define SHUT_RD 0 /* Disallow further receives. */
589 #define SHUT_WR 1 /* Disallow further sends. */
590 #define SHUT_RDWR 2 /* Disallow further sends/receives. */
591
592 #ifdef _KERNEL
593 static __inline socklen_t
sockaddr_getlen(const struct sockaddr * sa)594 sockaddr_getlen(const struct sockaddr *sa)
595 {
596 return sa->sa_len;
597 }
598
599 __BEGIN_DECLS
600 socklen_t sockaddr_getsize_by_family(sa_family_t);
601 struct sockaddr *sockaddr_copy(struct sockaddr *, socklen_t,
602 const struct sockaddr *);
603 struct sockaddr *sockaddr_externalize(struct sockaddr *, socklen_t,
604 const struct sockaddr *);
605 struct sockaddr *sockaddr_alloc(sa_family_t, socklen_t, int);
606 const void *sockaddr_const_addr(const struct sockaddr *, socklen_t *);
607 void *sockaddr_addr(struct sockaddr *, socklen_t *);
608 const struct sockaddr *sockaddr_any(const struct sockaddr *);
609 const struct sockaddr *sockaddr_any_by_family(sa_family_t);
610 const void *sockaddr_anyaddr(const struct sockaddr *, socklen_t *);
611 int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *);
612 struct sockaddr *sockaddr_dup(const struct sockaddr *, int);
613 int sockaddr_format(const struct sockaddr *, char *, size_t);
614 void sockaddr_free(struct sockaddr *);
615 __END_DECLS
616 #endif /* _KERNEL */
617
618 #ifndef _KERNEL
619
620 __BEGIN_DECLS
621 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
622 int accept4(int, struct sockaddr * __restrict, socklen_t * __restrict, int);
623 int bind(int, const struct sockaddr *, socklen_t);
624 int connect(int, const struct sockaddr *, socklen_t);
625 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
626 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
627 int getsockopt(int, int, int, void *__restrict, socklen_t * __restrict);
628 int getsockopt2(int, int, int, void *__restrict, socklen_t * __restrict);
629 int listen(int, int);
630 int paccept(int, struct sockaddr * __restrict, socklen_t * __restrict,
631 const sigset_t * __restrict, int);
632 ssize_t recv(int, void *, size_t, int);
633 ssize_t recvfrom(int, void *__restrict, size_t, int,
634 struct sockaddr * __restrict, socklen_t * __restrict);
635 ssize_t recvmsg(int, struct msghdr *, int);
636 ssize_t send(int, const void *, size_t, int);
637 ssize_t sendto(int, const void *,
638 size_t, int, const struct sockaddr *, socklen_t);
639 ssize_t sendmsg(int, const struct msghdr *, int);
640 int setsockopt(int, int, int, const void *, socklen_t);
641 int shutdown(int, int);
642 int sockatmark(int);
643 int socket(int, int, int)
644 #if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)
645 __RENAME(__socket30)
646 #endif
647 ;
648 int socketpair(int, int, int, int *);
649
650 #if defined(_NETBSD_SOURCE)
651 int sendmmsg(int, struct mmsghdr *, unsigned int, unsigned int);
652 struct timespec;
653 int recvmmsg(int, struct mmsghdr *, unsigned int, unsigned int,
654 struct timespec *);
655 #endif
656 __END_DECLS
657 #endif /* !_KERNEL */
658
659 #endif /* !_SYS_SOCKET_H_ */
660