1 /* $NetBSD: socket.h,v 1.119 2016/04/06 19:45:46 roy 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
136
137 /*
138 * Additional options, not kept in so_options.
139 */
140 #define SO_SNDBUF 0x1001 /* send buffer size */
141 #define SO_RCVBUF 0x1002 /* receive buffer size */
142 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
143 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
144 /* SO_OSNDTIMEO 0x1005 */
145 /* SO_ORCVTIMEO 0x1006 */
146 #define SO_ERROR 0x1007 /* get error status and clear */
147 #define SO_TYPE 0x1008 /* get socket type */
148 #define SO_OVERFLOWED 0x1009 /* datagrams: return packets dropped */
149
150 #define SO_NOHEADER 0x100a /* user supplies no header to kernel;
151 * kernel removes header and supplies
152 * payload
153 */
154 #define SO_SNDTIMEO 0x100b /* send timeout */
155 #define SO_RCVTIMEO 0x100c /* receive timeout */
156 /*
157 * Structure used for manipulating linger option.
158 */
159 struct linger {
160 int l_onoff; /* option on/off */
161 int l_linger; /* linger time in seconds */
162 };
163
164 struct accept_filter_arg {
165 char af_name[16];
166 char af_arg[256-16];
167 };
168
169 /*
170 * Level number for (get/set)sockopt() to apply to socket itself.
171 */
172 #define SOL_SOCKET 0xffff /* options for socket level */
173
174 /*
175 * Address families.
176 */
177 #define AF_UNSPEC 0 /* unspecified */
178 #define AF_LOCAL 1 /* local to host */
179 #define AF_UNIX AF_LOCAL /* backward compatibility */
180 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
181 #define AF_IMPLINK 3 /* arpanet imp addresses */
182 #define AF_PUP 4 /* pup protocols: e.g. BSP */
183 #define AF_CHAOS 5 /* mit CHAOS protocols */
184 #define AF_NS 6 /* XEROX NS protocols */
185 #define AF_ISO 7 /* ISO protocols */
186 #define AF_OSI AF_ISO
187 #define AF_ECMA 8 /* european computer manufacturers */
188 #define AF_DATAKIT 9 /* datakit protocols */
189 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
190 #define AF_SNA 11 /* IBM SNA */
191 #define AF_DECnet 12 /* DECnet */
192 #define AF_DLI 13 /* DEC Direct data link interface */
193 #define AF_LAT 14 /* LAT */
194 #define AF_HYLINK 15 /* NSC Hyperchannel */
195 #define AF_APPLETALK 16 /* Apple Talk */
196 #define AF_OROUTE 17 /* Internal Routing Protocol */
197 #define AF_LINK 18 /* Link layer interface */
198 #if defined(_NETBSD_SOURCE)
199 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
200 #endif
201 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
202 #define AF_CNT 21 /* Computer Network Technology */
203 #if defined(_NETBSD_SOURCE)
204 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
205 #endif
206 #define AF_IPX 23 /* Novell Internet Protocol */
207 #define AF_INET6 24 /* IP version 6 */
208 #if defined(_NETBSD_SOURCE)
209 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
210 #endif
211 #define AF_ISDN 26 /* Integrated Services Digital Network*/
212 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
213 #define AF_NATM 27 /* native ATM access */
214 #define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */
215 #if defined(_NETBSD_SOURCE)
216 #define pseudo_AF_KEY 29 /* Internal key management protocol */
217 #define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs
218 in interface output routine */
219 #endif
220 #define AF_BLUETOOTH 31 /* Bluetooth: HCI, SCO, L2CAP, RFCOMM */
221 #define AF_IEEE80211 32 /* IEEE80211 */
222 #define AF_MPLS 33 /* MultiProtocol Label Switching */
223 #define AF_ROUTE 34 /* Internal Routing Protocol */
224 #define AF_MAX 35
225
226 /*
227 * Structure used by kernel to store most
228 * addresses.
229 */
230 struct sockaddr {
231 __uint8_t sa_len; /* total length */
232 sa_family_t sa_family; /* address family */
233 char sa_data[14]; /* actually longer; address value */
234 };
235
236 #if defined(_KERNEL)
237 /*
238 * Structure used by kernel to pass protocol
239 * information in raw sockets.
240 */
241 struct sockproto {
242 u_short sp_family; /* address family */
243 u_short sp_protocol; /* protocol */
244 };
245
246 /*
247 * we make the entire struct at least UCHAR_MAX + 1 in size since existing
248 * use of sockaddr_un permits a path up to 253 bytes + '\0'.
249 * sizeof(sb_len) + sizeof(sb_family) + 253 + '\0'
250 */
251 #define _SB_DATASIZE 254
252 struct sockaddr_big {
253 union {
254 struct {
255 __uint8_t sb_len;
256 sa_family_t sb_family;
257 char sb_data[_SB_DATASIZE];
258 };
259 uint64_t dummy; /* solicit natural alignment */
260 };
261 };
262
263 #endif /* _KERNEL */
264
265 #if 1
266 /*
267 * RFC 2553: protocol-independent placeholder for socket addresses
268 */
269 #define _SS_MAXSIZE 128
270 #define _SS_ALIGNSIZE (sizeof(__int64_t))
271 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2)
272 #define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - \
273 _SS_PAD1SIZE - _SS_ALIGNSIZE)
274
275 #if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
276 struct sockaddr_storage {
277 __uint8_t ss_len; /* address length */
278 sa_family_t ss_family; /* address family */
279 char __ss_pad1[_SS_PAD1SIZE];
280 __int64_t __ss_align;/* force desired structure storage alignment */
281 char __ss_pad2[_SS_PAD2SIZE];
282 };
283 #define sstosa(__ss) ((struct sockaddr *)(__ss))
284 #define sstocsa(__ss) ((const struct sockaddr *)(__ss))
285 #endif /* _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
286 #endif /* 1 */
287
288 /*
289 * Protocol families, same as address families for now.
290 */
291 #define PF_UNSPEC AF_UNSPEC
292 #define PF_LOCAL AF_LOCAL
293 #define PF_UNIX PF_LOCAL /* backward compatibility */
294 #define PF_INET AF_INET
295 #define PF_IMPLINK AF_IMPLINK
296 #define PF_PUP AF_PUP
297 #define PF_CHAOS AF_CHAOS
298 #define PF_NS AF_NS
299 #define PF_ISO AF_ISO
300 #define PF_OSI AF_ISO
301 #define PF_ECMA AF_ECMA
302 #define PF_DATAKIT AF_DATAKIT
303 #define PF_CCITT AF_CCITT
304 #define PF_SNA AF_SNA
305 #define PF_DECnet AF_DECnet
306 #define PF_DLI AF_DLI
307 #define PF_LAT AF_LAT
308 #define PF_HYLINK AF_HYLINK
309 #define PF_APPLETALK AF_APPLETALK
310 #define PF_OROUTE AF_OROUTE
311 #define PF_LINK AF_LINK
312 #if defined(_NETBSD_SOURCE)
313 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
314 #endif
315 #define PF_COIP AF_COIP
316 #define PF_CNT AF_CNT
317 #define PF_INET6 AF_INET6
318 #define PF_IPX AF_IPX /* same format as AF_NS */
319 #if defined(_NETBSD_SOURCE)
320 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
321 #define PF_PIP pseudo_AF_PIP
322 #endif
323 #define PF_ISDN AF_ISDN /* same as E164 */
324 #define PF_E164 AF_E164
325 #define PF_NATM AF_NATM
326 #define PF_ARP AF_ARP
327 #if defined(_NETBSD_SOURCE)
328 #define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */
329 #endif
330 #define PF_BLUETOOTH AF_BLUETOOTH
331 #define PF_MPLS AF_MPLS
332 #define PF_ROUTE AF_ROUTE
333
334 #define PF_MAX AF_MAX
335
336 #if defined(_NETBSD_SOURCE)
337
338 #ifndef pid_t
339 typedef __pid_t pid_t; /* process id */
340 #define pid_t __pid_t
341 #endif
342
343 #ifndef gid_t
344 typedef __gid_t gid_t; /* group id */
345 #define gid_t __gid_t
346 #endif
347
348 #ifndef uid_t
349 typedef __uid_t uid_t; /* user id */
350 #define uid_t __uid_t
351 #endif
352
353 /*
354 * Socket credentials.
355 */
356 struct sockcred {
357 pid_t sc_pid; /* process id */
358 uid_t sc_uid; /* real user id */
359 uid_t sc_euid; /* effective user id */
360 gid_t sc_gid; /* real group id */
361 gid_t sc_egid; /* effective group id */
362 int sc_ngroups; /* number of supplemental groups */
363 gid_t sc_groups[1]; /* variable length */
364 };
365
366 /*
367 * Compute size of a sockcred structure with groups.
368 */
369 #define SOCKCREDSIZE(ngrps) \
370 (/*CONSTCOND*/sizeof(struct sockcred) + (sizeof(gid_t) * \
371 ((ngrps) ? ((ngrps) - 1) : 0)))
372 #endif /* _NETBSD_SOURCE */
373
374
375 #if defined(_NETBSD_SOURCE)
376 /*
377 * Definitions for network related sysctl, CTL_NET.
378 *
379 * Second level is protocol family.
380 * Third level is protocol number.
381 *
382 * Further levels are defined by the individual families below.
383 */
384 #define NET_MAXID AF_MAX
385
386 #define CTL_NET_NAMES { \
387 { 0, 0 }, \
388 { "local", CTLTYPE_NODE }, \
389 { "inet", CTLTYPE_NODE }, \
390 { "implink", CTLTYPE_NODE }, \
391 { "pup", CTLTYPE_NODE }, \
392 { "chaos", CTLTYPE_NODE }, \
393 { "xerox_ns", CTLTYPE_NODE }, \
394 { "iso", CTLTYPE_NODE }, \
395 { "emca", CTLTYPE_NODE }, \
396 { "datakit", CTLTYPE_NODE }, \
397 { "ccitt", CTLTYPE_NODE }, \
398 { "ibm_sna", CTLTYPE_NODE }, \
399 { "decnet", CTLTYPE_NODE }, \
400 { "dec_dli", CTLTYPE_NODE }, \
401 { "lat", CTLTYPE_NODE }, \
402 { "hylink", CTLTYPE_NODE }, \
403 { "appletalk", CTLTYPE_NODE }, \
404 { "oroute", CTLTYPE_NODE }, \
405 { "link_layer", CTLTYPE_NODE }, \
406 { "xtp", CTLTYPE_NODE }, \
407 { "coip", CTLTYPE_NODE }, \
408 { "cnt", CTLTYPE_NODE }, \
409 { "rtip", CTLTYPE_NODE }, \
410 { "ipx", CTLTYPE_NODE }, \
411 { "inet6", CTLTYPE_NODE }, \
412 { "pip", CTLTYPE_NODE }, \
413 { "isdn", CTLTYPE_NODE }, \
414 { "natm", CTLTYPE_NODE }, \
415 { "arp", CTLTYPE_NODE }, \
416 { "key", CTLTYPE_NODE }, \
417 { "ieee80211", CTLTYPE_NODE }, \
418 { "mlps", CTLTYPE_NODE }, \
419 { "route", CTLTYPE_NODE }, \
420 }
421
422 struct kinfo_pcb {
423 __uint64_t ki_pcbaddr; /* PTR: pcb addr */
424 __uint64_t ki_ppcbaddr; /* PTR: ppcb addr */
425 __uint64_t ki_sockaddr; /* PTR: socket addr */
426
427 __uint32_t ki_family; /* INT: protocol family */
428 __uint32_t ki_type; /* INT: socket type */
429 __uint32_t ki_protocol; /* INT: protocol */
430 __uint32_t ki_pflags; /* INT: generic protocol flags */
431
432 __uint32_t ki_sostate; /* INT: socket state */
433 __uint32_t ki_prstate; /* INT: protocol state */
434 __int32_t ki_tstate; /* INT: tcp state */
435 __uint32_t ki_tflags; /* INT: tcp flags */
436
437 __uint64_t ki_rcvq; /* U_LONG: receive queue len */
438 __uint64_t ki_sndq; /* U_LONG: send queue len */
439
440 union {
441 struct sockaddr _kis_src; /* STRUCT: local address */
442 char _kis_pad[256 + 8]; /* pad to max addr length */
443 } ki_s;
444 union {
445 struct sockaddr _kid_dst; /* STRUCT: remote address */
446 char _kid_pad[256 + 8]; /* pad to max addr length */
447 } ki_d;
448
449 __uint64_t ki_inode; /* INO_T: fake inode number */
450 __uint64_t ki_vnode; /* PTR: if associated with file */
451 __uint64_t ki_conn; /* PTR: control block of peer */
452 __uint64_t ki_refs; /* PTR: referencing socket */
453 __uint64_t ki_nextref; /* PTR: link in refs list */
454 };
455
456 #define ki_src ki_s._kis_src
457 #define ki_dst ki_d._kid_dst
458 #define ki_spad ki_s._kis_pad
459 #define ki_dpad ki_d._kid_pad
460
461 #define PCB_SLOP 20
462 #define PCB_ALL 0
463
464 #endif /* _NETBSD_SOURCE */
465
466 #if defined(_NETBSD_SOURCE)
467 /*
468 * PF_ROUTE - Routing table
469 *
470 * Three additional levels are defined:
471 * Fourth: address family, 0 is wildcard
472 * Fifth: type of info, defined below
473 * Sixth: flag(s) to mask with for NET_RT_FLAGS
474 */
475 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
476 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
477 #define NET_RT_OOIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */
478 #define NET_RT_OIFLIST 4 /* survey interface list */
479 #define NET_RT_IFLIST 5
480 #define NET_RT_MAXID 6
481
482 #define CTL_NET_RT_NAMES { \
483 { 0, 0 }, \
484 { "dump", CTLTYPE_STRUCT }, \
485 { "flags", CTLTYPE_STRUCT }, \
486 { 0, 0 }, \
487 { 0, 0 }, \
488 { "iflist", CTLTYPE_STRUCT }, \
489 }
490 #endif /* _NETBSD_SOURCE */
491
492 /*
493 * Maximum queue length specifiable by listen(2).
494 */
495 #ifndef SOMAXCONN
496 #define SOMAXCONN 128
497 #endif
498
499 #include <sys/cdefs.h>
500
501 /*
502 * Message header for recvmsg and sendmsg calls.
503 * Used value-result for recvmsg, value only for sendmsg.
504 */
505 struct msghdr {
506 void *msg_name; /* optional address */
507 socklen_t msg_namelen; /* size of address */
508 struct iovec *msg_iov; /* scatter/gather array */
509 int msg_iovlen; /* # elements in msg_iov */
510 void *msg_control; /* ancillary data, see below */
511 socklen_t msg_controllen; /* ancillary data buffer len */
512 int msg_flags; /* flags on received message */
513 };
514
515 #define MSG_OOB 0x0001 /* process out-of-band data */
516 #define MSG_PEEK 0x0002 /* peek at incoming message */
517 #define MSG_DONTROUTE 0x0004 /* send without using routing tables */
518 #define MSG_EOR 0x0008 /* data completes record */
519 #define MSG_TRUNC 0x0010 /* data discarded before delivery */
520 #define MSG_CTRUNC 0x0020 /* control data lost before delivery */
521 #define MSG_WAITALL 0x0040 /* wait for full request or error */
522 #define MSG_DONTWAIT 0x0080 /* this message should be nonblocking */
523 #define MSG_BCAST 0x0100 /* this message was rcvd using link-level brdcst */
524 #define MSG_MCAST 0x0200 /* this message was rcvd using link-level mcast */
525 #define MSG_NOSIGNAL 0x0400 /* do not generate SIGPIPE on EOF */
526 #if defined(_NETBSD_SOURCE)
527 #define MSG_CMSG_CLOEXEC 0x0800 /* close on exec receiving fd */
528 #define MSG_NBIO 0x1000 /* use non-blocking I/O */
529 #define MSG_WAITFORONE 0x2000 /* recvmmsg() wait for one message */
530 #define MSG_NOTIFICATION 0x4000 /* SCTP notification */
531
532 struct mmsghdr {
533 struct msghdr msg_hdr;
534 unsigned int msg_len;
535 };
536 #endif
537
538 /* Extra flags used internally only */
539 #define MSG_USERFLAGS 0x0ffffff
540 #define MSG_NAMEMBUF 0x1000000 /* msg_name is an mbuf */
541 #define MSG_CONTROLMBUF 0x2000000 /* msg_control is an mbuf */
542 #define MSG_IOVUSRSPACE 0x4000000 /* msg_iov is in user space */
543 #define MSG_LENUSRSPACE 0x8000000 /* address length is in user space */
544
545 /*
546 * Header for ancillary data objects in msg_control buffer.
547 * Used for additional information with/about a datagram
548 * not expressible by flags. The format is a sequence
549 * of message elements headed by cmsghdr structures.
550 */
551 struct cmsghdr {
552 socklen_t cmsg_len; /* data byte count, including hdr */
553 int cmsg_level; /* originating protocol */
554 int cmsg_type; /* protocol-specific type */
555 /* followed by u_char cmsg_data[]; */
556 };
557
558 /*
559 * Alignment requirement for CMSG struct manipulation.
560 * This basically behaves the same as ALIGN() ARCH/include/param.h.
561 * We declare it separately for two reasons:
562 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
563 * idea of ALIGNBYTES at runtime.
564 * without (2), we can't guarantee binary compatibility in case of future
565 * changes in ALIGNBYTES.
566 */
567 #define __CMSG_ALIGN(n) (((n) + __ALIGNBYTES) & ~__ALIGNBYTES)
568
569 #ifdef _KERNEL
570 #define CMSG_ALIGN(n) __CMSG_ALIGN(n)
571 #endif
572
573 #define __CMSG_ASIZE __CMSG_ALIGN(sizeof(struct cmsghdr))
574 #define __CMSG_MSGNEXT(cmsg) \
575 (__CASTV(char *, cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len))
576 #define __CMSG_MSGEND(mhdr) \
577 (__CASTV(char *, (mhdr)->msg_control) + (mhdr)->msg_controllen)
578
579 /* given pointer to struct cmsghdr, return pointer to data */
580 #define CMSG_DATA(cmsg) (__CASTV(u_char *, cmsg) + __CMSG_ASIZE)
581 #define CCMSG_DATA(cmsg) (__CASTCV(const u_char *, cmsg) + __CMSG_ASIZE)
582
583 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
584 #define CMSG_NXTHDR(mhdr, cmsg) \
585 __CASTV(struct cmsghdr *, \
586 __CMSG_MSGNEXT(cmsg) + __CMSG_ASIZE > __CMSG_MSGEND(mhdr) ? 0 : \
587 __CMSG_MSGNEXT(cmsg))
588
589 /*
590 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
591 * an empty list for some reasons.
592 */
593 #define CMSG_FIRSTHDR(mhdr) \
594 __CASTV(struct cmsghdr *, \
595 (mhdr)->msg_controllen < sizeof(struct cmsghdr) ? 0 : \
596 (mhdr)->msg_control)
597
598 #define CMSG_SPACE(l) (__CMSG_ASIZE + __CMSG_ALIGN(l))
599 #define CMSG_LEN(l) (__CMSG_ASIZE + (l))
600
601 /* "Socket"-level control message types: */
602 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
603 #if defined(_NETBSD_SOURCE)
604 /* 0x02 timestamp (struct timeval50) */
605 /* 0x04 credentials (struct sockcred70) */
606 #define SCM_TIMESTAMP 0x08 /* timestamp (struct timeval) */
607 #define SCM_CREDS 0x10 /* credentials (struct sockcred) */
608 #endif
609
610 /*
611 * Types of socket shutdown(2).
612 */
613 #define SHUT_RD 0 /* Disallow further receives. */
614 #define SHUT_WR 1 /* Disallow further sends. */
615 #define SHUT_RDWR 2 /* Disallow further sends/receives. */
616
617 #ifdef _KERNEL
618 static inline socklen_t
sockaddr_getlen(const struct sockaddr * sa)619 sockaddr_getlen(const struct sockaddr *sa)
620 {
621 return sa->sa_len;
622 }
623
624 __BEGIN_DECLS
625 struct sockaddr *sockaddr_copy(struct sockaddr *, socklen_t,
626 const struct sockaddr *);
627 struct sockaddr *sockaddr_externalize(struct sockaddr *, socklen_t,
628 const struct sockaddr *);
629 struct sockaddr *sockaddr_alloc(sa_family_t, socklen_t, int);
630 const void *sockaddr_const_addr(const struct sockaddr *, socklen_t *);
631 void *sockaddr_addr(struct sockaddr *, socklen_t *);
632 const struct sockaddr *sockaddr_any(const struct sockaddr *);
633 const struct sockaddr *sockaddr_any_by_family(int);
634 const void *sockaddr_anyaddr(const struct sockaddr *, socklen_t *);
635 int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *);
636 struct sockaddr *sockaddr_dup(const struct sockaddr *, int);
637 int sockaddr_format(const struct sockaddr *, char *, size_t);
638 void sockaddr_free(struct sockaddr *);
639 __END_DECLS
640 #endif /* _KERNEL */
641
642 #ifndef _KERNEL
643
644 __BEGIN_DECLS
645 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
646 int bind(int, const struct sockaddr *, socklen_t);
647 int connect(int, const struct sockaddr *, socklen_t);
648 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
649 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
650 int getsockopt(int, int, int, void *__restrict, socklen_t * __restrict);
651 int listen(int, int);
652 int paccept(int, struct sockaddr * __restrict, socklen_t * __restrict,
653 const sigset_t * __restrict, int);
654 ssize_t recv(int, void *, size_t, int);
655 ssize_t recvfrom(int, void *__restrict, size_t, int,
656 struct sockaddr * __restrict, socklen_t * __restrict);
657 ssize_t recvmsg(int, struct msghdr *, int);
658 ssize_t send(int, const void *, size_t, int);
659 ssize_t sendto(int, const void *,
660 size_t, int, const struct sockaddr *, socklen_t);
661 ssize_t sendmsg(int, const struct msghdr *, int);
662 int setsockopt(int, int, int, const void *, socklen_t);
663 int shutdown(int, int);
664 int sockatmark(int);
665 int socket(int, int, int)
666 #if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)
667 __RENAME(__socket30)
668 #endif
669 ;
670 int socketpair(int, int, int, int *);
671
672 #if defined(_NETBSD_SOURCE)
673 int sendmmsg(int, struct mmsghdr *, unsigned int, unsigned int);
674 struct timespec;
675 int recvmmsg(int, struct mmsghdr *, unsigned int, unsigned int,
676 struct timespec *);
677 #endif
678 __END_DECLS
679 #endif /* !_KERNEL */
680
681 #endif /* !_SYS_SOCKET_H_ */
682