FreeBSD/Linux Kernel Cross Reference
sys/sys/socket.h
1 /*-
2 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)socket.h 8.4 (Berkeley) 2/21/94
30 * $FreeBSD$
31 */
32
33 #ifndef _SYS_SOCKET_H_
34 #define _SYS_SOCKET_H_
35
36 #include <sys/cdefs.h>
37 #include <sys/_types.h>
38 #include <sys/_iovec.h>
39 #define _NO_NAMESPACE_POLLUTION
40 #include <machine/param.h>
41 #undef _NO_NAMESPACE_POLLUTION
42
43 /*
44 * Definitions related to sockets: types, address families, options.
45 */
46
47 /*
48 * Data types.
49 */
50 #if __BSD_VISIBLE
51 #ifndef _GID_T_DECLARED
52 typedef __gid_t gid_t;
53 #define _GID_T_DECLARED
54 #endif
55
56 #ifndef _OFF_T_DECLARED
57 typedef __off_t off_t;
58 #define _OFF_T_DECLARED
59 #endif
60
61 #ifndef _PID_T_DECLARED
62 typedef __pid_t pid_t;
63 #define _PID_T_DECLARED
64 #endif
65 #endif
66
67 #ifndef _SA_FAMILY_T_DECLARED
68 typedef __sa_family_t sa_family_t;
69 #define _SA_FAMILY_T_DECLARED
70 #endif
71
72 #ifndef _SOCKLEN_T_DECLARED
73 typedef __socklen_t socklen_t;
74 #define _SOCKLEN_T_DECLARED
75 #endif
76
77 #ifndef _SSIZE_T_DECLARED
78 typedef __ssize_t ssize_t;
79 #define _SSIZE_T_DECLARED
80 #endif
81
82 #if __BSD_VISIBLE
83 #ifndef _UID_T_DECLARED
84 typedef __uid_t uid_t;
85 #define _UID_T_DECLARED
86 #endif
87 #endif
88
89 /*
90 * Types
91 */
92 #define SOCK_STREAM 1 /* stream socket */
93 #define SOCK_DGRAM 2 /* datagram socket */
94 #define SOCK_RAW 3 /* raw-protocol interface */
95 #if __BSD_VISIBLE
96 #define SOCK_RDM 4 /* reliably-delivered message */
97 #endif
98 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
99
100 /*
101 * Option flags per-socket.
102 */
103 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
104 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
105 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
106 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
107 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
108 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
109 #if __BSD_VISIBLE
110 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
111 #endif
112 #define SO_LINGER 0x0080 /* linger on close if data present */
113 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
114 #if __BSD_VISIBLE
115 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
116 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
117 #define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
118 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
119 #define SO_BINTIME 0x2000 /* timestamp received dgram traffic */
120 #endif
121 #define SO_NO_OFFLOAD 0x4000 /* socket cannot be offloaded */
122 #define SO_NO_DDP 0x8000 /* disable direct data placement */
123
124 /*
125 * Additional options, not kept in so_options.
126 */
127 #define SO_SNDBUF 0x1001 /* send buffer size */
128 #define SO_RCVBUF 0x1002 /* receive buffer size */
129 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
130 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
131 #define SO_SNDTIMEO 0x1005 /* send timeout */
132 #define SO_RCVTIMEO 0x1006 /* receive timeout */
133 #define SO_ERROR 0x1007 /* get error status and clear */
134 #define SO_TYPE 0x1008 /* get socket type */
135 #if __BSD_VISIBLE
136 #define SO_LABEL 0x1009 /* socket's MAC label */
137 #define SO_PEERLABEL 0x1010 /* socket's peer's MAC label */
138 #define SO_LISTENQLIMIT 0x1011 /* socket's backlog limit */
139 #define SO_LISTENQLEN 0x1012 /* socket's complete queue length */
140 #define SO_LISTENINCQLEN 0x1013 /* socket's incomplete queue length */
141 #define SO_SETFIB 0x1014 /* use this FIB to route */
142 #define SO_PROTOCOL 0x1016 /* get socket protocol (Linux name) */
143 #define SO_PROTOTYPE SO_PROTOCOL /* alias for SO_PROTOCOL (SunOS name) */
144 #endif
145
146 /*
147 * Space reserved for new socket options added by third-party vendors.
148 * This range applies to all socket option levels. New socket options
149 * in FreeBSD should always use an option value less than SO_VENDOR.
150 */
151 #if __BSD_VISIBLE
152 #define SO_VENDOR 0x80000000
153 #endif
154
155 /*
156 * Structure used for manipulating linger option.
157 */
158 struct linger {
159 int l_onoff; /* option on/off */
160 int l_linger; /* linger time */
161 };
162
163 #if __BSD_VISIBLE
164 struct accept_filter_arg {
165 char af_name[16];
166 char af_arg[256-16];
167 };
168 #endif
169
170 /*
171 * Level number for (get/set)sockopt() to apply to socket itself.
172 */
173 #define SOL_SOCKET 0xffff /* options for socket level */
174
175 /*
176 * Address families.
177 */
178 #define AF_UNSPEC 0 /* unspecified */
179 #if __BSD_VISIBLE
180 #define AF_LOCAL AF_UNIX /* local to host (pipes, portals) */
181 #endif
182 #define AF_UNIX 1 /* standardized name for AF_LOCAL */
183 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
184 #if __BSD_VISIBLE
185 #define AF_IMPLINK 3 /* arpanet imp addresses */
186 #define AF_PUP 4 /* pup protocols: e.g. BSP */
187 #define AF_CHAOS 5 /* mit CHAOS protocols */
188 #define AF_NETBIOS 6 /* SMB protocols */
189 #define AF_ISO 7 /* ISO protocols */
190 #define AF_OSI AF_ISO
191 #define AF_ECMA 8 /* European computer manufacturers */
192 #define AF_DATAKIT 9 /* datakit protocols */
193 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
194 #define AF_SNA 11 /* IBM SNA */
195 #define AF_DECnet 12 /* DECnet */
196 #define AF_DLI 13 /* DEC Direct data link interface */
197 #define AF_LAT 14 /* LAT */
198 #define AF_HYLINK 15 /* NSC Hyperchannel */
199 #define AF_APPLETALK 16 /* Apple Talk */
200 #define AF_ROUTE 17 /* Internal Routing Protocol */
201 #define AF_LINK 18 /* Link layer interface */
202 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
203 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
204 #define AF_CNT 21 /* Computer Network Technology */
205 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
206 #define AF_IPX 23 /* Novell Internet Protocol */
207 #define AF_SIP 24 /* Simple Internet Protocol */
208 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
209 #define AF_ISDN 26 /* Integrated Services Digital Network*/
210 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
211 #define pseudo_AF_KEY 27 /* Internal key-management function */
212 #endif
213 #define AF_INET6 28 /* IPv6 */
214 #if __BSD_VISIBLE
215 #define AF_NATM 29 /* native ATM access */
216 #define AF_ATM 30 /* ATM */
217 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
218 * in interface output routine
219 */
220 #define AF_NETGRAPH 32 /* Netgraph sockets */
221 #define AF_SLOW 33 /* 802.3ad slow protocol */
222 #define AF_SCLUSTER 34 /* Sitara cluster protocol */
223 #define AF_ARP 35
224 #define AF_BLUETOOTH 36 /* Bluetooth sockets */
225 #define AF_IEEE80211 37 /* IEEE 802.11 protocol */
226 #define AF_MAX 38
227 /*
228 * When allocating a new AF_ constant, please only allocate
229 * even numbered constants for FreeBSD until 134 as odd numbered AF_
230 * constants 39-133 are now reserved for vendors.
231 */
232 #define AF_VENDOR00 39
233 #define AF_VENDOR01 41
234 #define AF_VENDOR02 43
235 #define AF_VENDOR03 45
236 #define AF_VENDOR04 47
237 #define AF_VENDOR05 49
238 #define AF_VENDOR06 51
239 #define AF_VENDOR07 53
240 #define AF_VENDOR08 55
241 #define AF_VENDOR09 57
242 #define AF_VENDOR10 59
243 #define AF_VENDOR11 61
244 #define AF_VENDOR12 63
245 #define AF_VENDOR13 65
246 #define AF_VENDOR14 67
247 #define AF_VENDOR15 69
248 #define AF_VENDOR16 71
249 #define AF_VENDOR17 73
250 #define AF_VENDOR18 75
251 #define AF_VENDOR19 77
252 #define AF_VENDOR20 79
253 #define AF_VENDOR21 81
254 #define AF_VENDOR22 83
255 #define AF_VENDOR23 85
256 #define AF_VENDOR24 87
257 #define AF_VENDOR25 89
258 #define AF_VENDOR26 91
259 #define AF_VENDOR27 93
260 #define AF_VENDOR28 95
261 #define AF_VENDOR29 97
262 #define AF_VENDOR30 99
263 #define AF_VENDOR31 101
264 #define AF_VENDOR32 103
265 #define AF_VENDOR33 105
266 #define AF_VENDOR34 107
267 #define AF_VENDOR35 109
268 #define AF_VENDOR36 111
269 #define AF_VENDOR37 113
270 #define AF_VENDOR38 115
271 #define AF_VENDOR39 117
272 #define AF_VENDOR40 119
273 #define AF_VENDOR41 121
274 #define AF_VENDOR42 123
275 #define AF_VENDOR43 125
276 #define AF_VENDOR44 127
277 #define AF_VENDOR45 129
278 #define AF_VENDOR46 131
279 #define AF_VENDOR47 133
280 #endif
281
282 /*
283 * Structure used by kernel to store most
284 * addresses.
285 */
286 struct sockaddr {
287 unsigned char sa_len; /* total length */
288 sa_family_t sa_family; /* address family */
289 char sa_data[14]; /* actually longer; address value */
290 };
291 #if __BSD_VISIBLE
292 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
293
294 /*
295 * Structure used by kernel to pass protocol
296 * information in raw sockets.
297 */
298 struct sockproto {
299 unsigned short sp_family; /* address family */
300 unsigned short sp_protocol; /* protocol */
301 };
302 #endif
303
304 #ifndef _STRUCT_SOCKADDR_STORAGE_DECLARED
305 /*
306 * RFC 2553: protocol-independent placeholder for socket addresses
307 */
308 #define _SS_MAXSIZE 128U
309 #define _SS_ALIGNSIZE (sizeof(__int64_t))
310 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) - \
311 sizeof(sa_family_t))
312 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) - \
313 sizeof(sa_family_t) - _SS_PAD1SIZE - _SS_ALIGNSIZE)
314
315 struct sockaddr_storage {
316 unsigned char ss_len; /* address length */
317 sa_family_t ss_family; /* address family */
318 char __ss_pad1[_SS_PAD1SIZE];
319 __int64_t __ss_align; /* force desired struct alignment */
320 char __ss_pad2[_SS_PAD2SIZE];
321 };
322 #define _STRUCT_SOCKADDR_STORAGE_DECLARED
323 #endif
324
325 #if __BSD_VISIBLE
326 /*
327 * Protocol families, same as address families for now.
328 */
329 #define PF_UNSPEC AF_UNSPEC
330 #define PF_LOCAL AF_LOCAL
331 #define PF_UNIX PF_LOCAL /* backward compatibility */
332 #define PF_INET AF_INET
333 #define PF_IMPLINK AF_IMPLINK
334 #define PF_PUP AF_PUP
335 #define PF_CHAOS AF_CHAOS
336 #define PF_NETBIOS AF_NETBIOS
337 #define PF_ISO AF_ISO
338 #define PF_OSI AF_ISO
339 #define PF_ECMA AF_ECMA
340 #define PF_DATAKIT AF_DATAKIT
341 #define PF_CCITT AF_CCITT
342 #define PF_SNA AF_SNA
343 #define PF_DECnet AF_DECnet
344 #define PF_DLI AF_DLI
345 #define PF_LAT AF_LAT
346 #define PF_HYLINK AF_HYLINK
347 #define PF_APPLETALK AF_APPLETALK
348 #define PF_ROUTE AF_ROUTE
349 #define PF_LINK AF_LINK
350 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
351 #define PF_COIP AF_COIP
352 #define PF_CNT AF_CNT
353 #define PF_SIP AF_SIP
354 #define PF_IPX AF_IPX
355 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
356 #define PF_PIP pseudo_AF_PIP
357 #define PF_ISDN AF_ISDN
358 #define PF_KEY pseudo_AF_KEY
359 #define PF_INET6 AF_INET6
360 #define PF_NATM AF_NATM
361 #define PF_ATM AF_ATM
362 #define PF_NETGRAPH AF_NETGRAPH
363 #define PF_SLOW AF_SLOW
364 #define PF_SCLUSTER AF_SCLUSTER
365 #define PF_ARP AF_ARP
366 #define PF_BLUETOOTH AF_BLUETOOTH
367
368 #define PF_MAX AF_MAX
369
370 /*
371 * Definitions for network related sysctl, CTL_NET.
372 *
373 * Second level is protocol family.
374 * Third level is protocol number.
375 *
376 * Further levels are defined by the individual families below.
377 */
378 #define NET_MAXID AF_MAX
379
380 #define CTL_NET_NAMES { \
381 { 0, 0 }, \
382 { "unix", CTLTYPE_NODE }, \
383 { "inet", CTLTYPE_NODE }, \
384 { "implink", CTLTYPE_NODE }, \
385 { "pup", CTLTYPE_NODE }, \
386 { "chaos", CTLTYPE_NODE }, \
387 { "xerox_ns", CTLTYPE_NODE }, \
388 { "iso", CTLTYPE_NODE }, \
389 { "emca", CTLTYPE_NODE }, \
390 { "datakit", CTLTYPE_NODE }, \
391 { "ccitt", CTLTYPE_NODE }, \
392 { "ibm_sna", CTLTYPE_NODE }, \
393 { "decnet", CTLTYPE_NODE }, \
394 { "dec_dli", CTLTYPE_NODE }, \
395 { "lat", CTLTYPE_NODE }, \
396 { "hylink", CTLTYPE_NODE }, \
397 { "appletalk", CTLTYPE_NODE }, \
398 { "route", CTLTYPE_NODE }, \
399 { "link_layer", CTLTYPE_NODE }, \
400 { "xtp", CTLTYPE_NODE }, \
401 { "coip", CTLTYPE_NODE }, \
402 { "cnt", CTLTYPE_NODE }, \
403 { "rtip", CTLTYPE_NODE }, \
404 { "ipx", CTLTYPE_NODE }, \
405 { "sip", CTLTYPE_NODE }, \
406 { "pip", CTLTYPE_NODE }, \
407 { "isdn", CTLTYPE_NODE }, \
408 { "key", CTLTYPE_NODE }, \
409 { "inet6", CTLTYPE_NODE }, \
410 { "natm", CTLTYPE_NODE }, \
411 { "atm", CTLTYPE_NODE }, \
412 { "hdrcomplete", CTLTYPE_NODE }, \
413 { "netgraph", CTLTYPE_NODE }, \
414 { "snp", CTLTYPE_NODE }, \
415 { "scp", CTLTYPE_NODE }, \
416 }
417
418 /*
419 * PF_ROUTE - Routing table
420 *
421 * Three additional levels are defined:
422 * Fourth: address family, 0 is wildcard
423 * Fifth: type of info, defined below
424 * Sixth: flag(s) to mask with for NET_RT_FLAGS
425 */
426 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
427 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
428 #define NET_RT_IFLIST 3 /* survey interface list */
429 #define NET_RT_IFMALIST 4 /* return multicast address list */
430 #define NET_RT_IFLISTL 5 /* Survey interface list, using 'l'en
431 * versions of msghdr structs. */
432 #define NET_RT_MAXID 6
433
434 #define CTL_NET_RT_NAMES { \
435 { 0, 0 }, \
436 { "dump", CTLTYPE_STRUCT }, \
437 { "flags", CTLTYPE_STRUCT }, \
438 { "iflist", CTLTYPE_STRUCT }, \
439 { "ifmalist", CTLTYPE_STRUCT }, \
440 { "iflistl", CTLTYPE_STRUCT }, \
441 }
442 #endif /* __BSD_VISIBLE */
443
444 /*
445 * Maximum queue length specifiable by listen.
446 */
447 #define SOMAXCONN 128
448
449 /*
450 * Message header for recvmsg and sendmsg calls.
451 * Used value-result for recvmsg, value only for sendmsg.
452 */
453 struct msghdr {
454 void *msg_name; /* optional address */
455 socklen_t msg_namelen; /* size of address */
456 struct iovec *msg_iov; /* scatter/gather array */
457 int msg_iovlen; /* # elements in msg_iov */
458 void *msg_control; /* ancillary data, see below */
459 socklen_t msg_controllen; /* ancillary data buffer len */
460 int msg_flags; /* flags on received message */
461 };
462
463 #define MSG_OOB 0x1 /* process out-of-band data */
464 #define MSG_PEEK 0x2 /* peek at incoming message */
465 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
466 #define MSG_EOR 0x8 /* data completes record */
467 #define MSG_TRUNC 0x10 /* data discarded before delivery */
468 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
469 #define MSG_WAITALL 0x40 /* wait for full request or error */
470 #define MSG_NOTIFICATION 0x2000 /* SCTP notification */
471 #if __BSD_VISIBLE
472 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
473 #define MSG_EOF 0x100 /* data completes connection */
474 #define MSG_NBIO 0x4000 /* FIONBIO mode, used by fifofs */
475 #define MSG_COMPAT 0x8000 /* used in sendit() */
476 #endif
477 #ifdef _KERNEL
478 #define MSG_SOCALLBCK 0x10000 /* for use by socket callbacks - soreceive (TCP) */
479 #endif
480 #if __BSD_VISIBLE
481 #define MSG_NOSIGNAL 0x20000 /* do not generate SIGPIPE on EOF */
482 #endif
483
484 /*
485 * Header for ancillary data objects in msg_control buffer.
486 * Used for additional information with/about a datagram
487 * not expressible by flags. The format is a sequence
488 * of message elements headed by cmsghdr structures.
489 */
490 struct cmsghdr {
491 socklen_t cmsg_len; /* data byte count, including hdr */
492 int cmsg_level; /* originating protocol */
493 int cmsg_type; /* protocol-specific type */
494 /* followed by u_char cmsg_data[]; */
495 };
496
497 #if __BSD_VISIBLE
498 /*
499 * While we may have more groups than this, the cmsgcred struct must
500 * be able to fit in an mbuf and we have historically supported a
501 * maximum of 16 groups.
502 */
503 #define CMGROUP_MAX 16
504
505 /*
506 * Credentials structure, used to verify the identity of a peer
507 * process that has sent us a message. This is allocated by the
508 * peer process but filled in by the kernel. This prevents the
509 * peer from lying about its identity. (Note that cmcred_groups[0]
510 * is the effective GID.)
511 */
512 struct cmsgcred {
513 pid_t cmcred_pid; /* PID of sending process */
514 uid_t cmcred_uid; /* real UID of sending process */
515 uid_t cmcred_euid; /* effective UID of sending process */
516 gid_t cmcred_gid; /* real GID of sending process */
517 short cmcred_ngroups; /* number or groups */
518 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
519 };
520
521 /*
522 * Socket credentials.
523 */
524 struct sockcred {
525 uid_t sc_uid; /* real user id */
526 uid_t sc_euid; /* effective user id */
527 gid_t sc_gid; /* real group id */
528 gid_t sc_egid; /* effective group id */
529 int sc_ngroups; /* number of supplemental groups */
530 gid_t sc_groups[1]; /* variable length */
531 };
532
533 /*
534 * Compute size of a sockcred structure with groups.
535 */
536 #define SOCKCREDSIZE(ngrps) \
537 (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
538
539 #endif /* __BSD_VISIBLE */
540
541 /* given pointer to struct cmsghdr, return pointer to data */
542 #define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \
543 _ALIGN(sizeof(struct cmsghdr)))
544
545 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
546 #define CMSG_NXTHDR(mhdr, cmsg) \
547 ((char *)(cmsg) == NULL ? CMSG_FIRSTHDR(mhdr) : \
548 ((char *)(cmsg) + _ALIGN(((struct cmsghdr *)(cmsg))->cmsg_len) + \
549 _ALIGN(sizeof(struct cmsghdr)) > \
550 (char *)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
551 (struct cmsghdr *)0 : \
552 (struct cmsghdr *)((char *)(cmsg) + \
553 _ALIGN(((struct cmsghdr *)(cmsg))->cmsg_len)))
554
555 /*
556 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
557 * an empty list for some reasons.
558 */
559 #define CMSG_FIRSTHDR(mhdr) \
560 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
561 (struct cmsghdr *)(mhdr)->msg_control : \
562 (struct cmsghdr *)NULL)
563
564 #if __BSD_VISIBLE
565 /* RFC 2292 additions */
566 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
567 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
568 #endif
569
570 #ifdef _KERNEL
571 #define CMSG_ALIGN(n) _ALIGN(n)
572 #endif
573
574 /* "Socket"-level control message types: */
575 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
576 #if __BSD_VISIBLE
577 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
578 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
579 #define SCM_BINTIME 0x04 /* timestamp (struct bintime) */
580 #endif
581
582 #if __BSD_VISIBLE
583 /*
584 * 4.3 compat sockaddr, move to compat file later
585 */
586 struct osockaddr {
587 unsigned short sa_family; /* address family */
588 char sa_data[14]; /* up to 14 bytes of direct address */
589 };
590
591 /*
592 * 4.3-compat message header (move to compat file later).
593 */
594 struct omsghdr {
595 char *msg_name; /* optional address */
596 int msg_namelen; /* size of address */
597 struct iovec *msg_iov; /* scatter/gather array */
598 int msg_iovlen; /* # elements in msg_iov */
599 char *msg_accrights; /* access rights sent/received */
600 int msg_accrightslen;
601 };
602 #endif
603
604 /*
605 * howto arguments for shutdown(2), specified by Posix.1g.
606 */
607 #define SHUT_RD 0 /* shut down the reading side */
608 #define SHUT_WR 1 /* shut down the writing side */
609 #define SHUT_RDWR 2 /* shut down both sides */
610
611 /* we cheat and use the SHUT_XX defines for these */
612 #define PRU_FLUSH_RD SHUT_RD
613 #define PRU_FLUSH_WR SHUT_WR
614 #define PRU_FLUSH_RDWR SHUT_RDWR
615
616
617 #if __BSD_VISIBLE
618 /*
619 * sendfile(2) header/trailer struct
620 */
621 struct sf_hdtr {
622 struct iovec *headers; /* pointer to an array of header struct iovec's */
623 int hdr_cnt; /* number of header iovec's */
624 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
625 int trl_cnt; /* number of trailer iovec's */
626 };
627
628 /*
629 * Sendfile-specific flag(s)
630 */
631 #define SF_NODISKIO 0x00000001
632 #define SF_MNOWAIT 0x00000002
633 #define SF_SYNC 0x00000004
634 #endif
635
636 #ifndef _KERNEL
637
638 #include <sys/cdefs.h>
639
640 __BEGIN_DECLS
641 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
642 int bind(int, const struct sockaddr *, socklen_t);
643 int connect(int, const struct sockaddr *, socklen_t);
644 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
645 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
646 int getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
647 int listen(int, int);
648 ssize_t recv(int, void *, size_t, int);
649 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict);
650 ssize_t recvmsg(int, struct msghdr *, int);
651 ssize_t send(int, const void *, size_t, int);
652 ssize_t sendto(int, const void *,
653 size_t, int, const struct sockaddr *, socklen_t);
654 ssize_t sendmsg(int, const struct msghdr *, int);
655 #if __BSD_VISIBLE
656 int sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
657 int setfib(int);
658 #endif
659 int setsockopt(int, int, int, const void *, socklen_t);
660 int shutdown(int, int);
661 int sockatmark(int);
662 int socket(int, int, int);
663 int socketpair(int, int, int, int *);
664 __END_DECLS
665
666 #endif /* !_KERNEL */
667
668 #ifdef _KERNEL
669 struct socket;
670
671 struct tcpcb *so_sototcpcb(struct socket *so);
672 struct inpcb *so_sotoinpcb(struct socket *so);
673 struct sockbuf *so_sockbuf_snd(struct socket *);
674 struct sockbuf *so_sockbuf_rcv(struct socket *);
675
676 int so_state_get(const struct socket *);
677 void so_state_set(struct socket *, int);
678
679 int so_options_get(const struct socket *);
680 void so_options_set(struct socket *, int);
681
682 int so_error_get(const struct socket *);
683 void so_error_set(struct socket *, int);
684
685 int so_linger_get(const struct socket *);
686 void so_linger_set(struct socket *, int);
687
688 struct protosw *so_protosw_get(const struct socket *);
689 void so_protosw_set(struct socket *, struct protosw *);
690
691 void so_sorwakeup_locked(struct socket *so);
692 void so_sowwakeup_locked(struct socket *so);
693
694 void so_sorwakeup(struct socket *so);
695 void so_sowwakeup(struct socket *so);
696
697 void so_lock(struct socket *so);
698 void so_unlock(struct socket *so);
699
700 void so_listeners_apply_all(struct socket *so, void (*func)(struct socket *, void *), void *arg);
701
702 #endif
703
704
705 #endif /* !_SYS_SOCKET_H_ */
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