1 /* $NetBSD: socket.h,v 1.117 2015/04/03 20:01:08 rtr 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 * Additional options, not kept in so_options.
138 */
139 #define SO_SNDBUF 0x1001 /* send buffer size */
140 #define SO_RCVBUF 0x1002 /* receive buffer size */
141 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
142 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
143 /* SO_OSNDTIMEO 0x1005 */
144 /* SO_ORCVTIMEO 0x1006 */
145 #define SO_ERROR 0x1007 /* get error status and clear */
146 #define SO_TYPE 0x1008 /* get socket type */
147 #define SO_OVERFLOWED 0x1009 /* datagrams: return packets dropped */
148
149 #define SO_NOHEADER 0x100a /* user supplies no header to kernel;
150 * kernel removes header and supplies
151 * payload
152 */
153 #define SO_SNDTIMEO 0x100b /* send timeout */
154 #define SO_RCVTIMEO 0x100c /* receive timeout */
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 in seconds */
161 };
162
163 struct accept_filter_arg {
164 char af_name[16];
165 char af_arg[256-16];
166 };
167
168 /*
169 * Level number for (get/set)sockopt() to apply to socket itself.
170 */
171 #define SOL_SOCKET 0xffff /* options for socket level */
172
173 /*
174 * Address families.
175 */
176 #define AF_UNSPEC 0 /* unspecified */
177 #define AF_LOCAL 1 /* local to host */
178 #define AF_UNIX AF_LOCAL /* backward compatibility */
179 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
180 #define AF_IMPLINK 3 /* arpanet imp addresses */
181 #define AF_PUP 4 /* pup protocols: e.g. BSP */
182 #define AF_CHAOS 5 /* mit CHAOS protocols */
183 #define AF_NS 6 /* XEROX NS protocols */
184 #define AF_ISO 7 /* ISO protocols */
185 #define AF_OSI AF_ISO
186 #define AF_ECMA 8 /* european computer manufacturers */
187 #define AF_DATAKIT 9 /* datakit protocols */
188 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
189 #define AF_SNA 11 /* IBM SNA */
190 #define AF_DECnet 12 /* DECnet */
191 #define AF_DLI 13 /* DEC Direct data link interface */
192 #define AF_LAT 14 /* LAT */
193 #define AF_HYLINK 15 /* NSC Hyperchannel */
194 #define AF_APPLETALK 16 /* Apple Talk */
195 #define AF_OROUTE 17 /* Internal Routing Protocol */
196 #define AF_LINK 18 /* Link layer interface */
197 #if defined(_NETBSD_SOURCE)
198 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
199 #endif
200 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
201 #define AF_CNT 21 /* Computer Network Technology */
202 #if defined(_NETBSD_SOURCE)
203 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
204 #endif
205 #define AF_IPX 23 /* Novell Internet Protocol */
206 #define AF_INET6 24 /* IP version 6 */
207 #if defined(_NETBSD_SOURCE)
208 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
209 #endif
210 #define AF_ISDN 26 /* Integrated Services Digital Network*/
211 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
212 #define AF_NATM 27 /* native ATM access */
213 #define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */
214 #if defined(_NETBSD_SOURCE)
215 #define pseudo_AF_KEY 29 /* Internal key management protocol */
216 #define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs
217 in interface output routine */
218 #endif
219 #define AF_BLUETOOTH 31 /* Bluetooth: HCI, SCO, L2CAP, RFCOMM */
220 #define AF_IEEE80211 32 /* IEEE80211 */
221 #define AF_MPLS 33 /* MultiProtocol Label Switching */
222 #define AF_ROUTE 34 /* Internal Routing Protocol */
223 #define AF_MAX 35
224
225 /*
226 * Structure used by kernel to store most
227 * addresses.
228 */
229 struct sockaddr {
230 __uint8_t sa_len; /* total length */
231 sa_family_t sa_family; /* address family */
232 char sa_data[14]; /* actually longer; address value */
233 };
234
235 #if defined(_KERNEL)
236 /*
237 * Structure used by kernel to pass protocol
238 * information in raw sockets.
239 */
240 struct sockproto {
241 u_short sp_family; /* address family */
242 u_short sp_protocol; /* protocol */
243 };
244
245 /*
246 * we make the entire struct at least UCHAR_MAX + 1 in size since existing
247 * use of sockaddr_un permits a path up to 253 bytes + '\0'.
248 * sizeof(sb_len) + sizeof(sb_family) + 253 + '\0'
249 */
250 #define _SB_DATASIZE 254
251 struct sockaddr_big {
252 union {
253 struct {
254 __uint8_t sb_len;
255 sa_family_t sb_family;
256 char sb_data[_SB_DATASIZE];
257 };
258 uint64_t dummy; /* solicit natural alignment */
259 };
260 };
261
262 #endif /* _KERNEL */
263
264 #if 1
265 /*
266 * RFC 2553: protocol-independent placeholder for socket addresses
267 */
268 #define _SS_MAXSIZE 128
269 #define _SS_ALIGNSIZE (sizeof(__int64_t))
270 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2)
271 #define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - \
272 _SS_PAD1SIZE - _SS_ALIGNSIZE)
273
274 #if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
275 struct sockaddr_storage {
276 __uint8_t ss_len; /* address length */
277 sa_family_t ss_family; /* address family */
278 char __ss_pad1[_SS_PAD1SIZE];
279 __int64_t __ss_align;/* force desired structure storage alignment */
280 char __ss_pad2[_SS_PAD2SIZE];
281 };
282 #define sstosa(__ss) ((struct sockaddr *)(__ss))
283 #define sstocsa(__ss) ((const struct sockaddr *)(__ss))
284 #endif /* _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
285 #endif /* 1 */
286
287 /*
288 * Protocol families, same as address families for now.
289 */
290 #define PF_UNSPEC AF_UNSPEC
291 #define PF_LOCAL AF_LOCAL
292 #define PF_UNIX PF_LOCAL /* backward compatibility */
293 #define PF_INET AF_INET
294 #define PF_IMPLINK AF_IMPLINK
295 #define PF_PUP AF_PUP
296 #define PF_CHAOS AF_CHAOS
297 #define PF_NS AF_NS
298 #define PF_ISO AF_ISO
299 #define PF_OSI AF_ISO
300 #define PF_ECMA AF_ECMA
301 #define PF_DATAKIT AF_DATAKIT
302 #define PF_CCITT AF_CCITT
303 #define PF_SNA AF_SNA
304 #define PF_DECnet AF_DECnet
305 #define PF_DLI AF_DLI
306 #define PF_LAT AF_LAT
307 #define PF_HYLINK AF_HYLINK
308 #define PF_APPLETALK AF_APPLETALK
309 #define PF_OROUTE AF_OROUTE
310 #define PF_LINK AF_LINK
311 #if defined(_NETBSD_SOURCE)
312 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
313 #endif
314 #define PF_COIP AF_COIP
315 #define PF_CNT AF_CNT
316 #define PF_INET6 AF_INET6
317 #define PF_IPX AF_IPX /* same format as AF_NS */
318 #if defined(_NETBSD_SOURCE)
319 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
320 #define PF_PIP pseudo_AF_PIP
321 #endif
322 #define PF_ISDN AF_ISDN /* same as E164 */
323 #define PF_E164 AF_E164
324 #define PF_NATM AF_NATM
325 #define PF_ARP AF_ARP
326 #if defined(_NETBSD_SOURCE)
327 #define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */
328 #endif
329 #define PF_BLUETOOTH AF_BLUETOOTH
330 #define PF_MPLS AF_MPLS
331 #define PF_ROUTE AF_ROUTE
332
333 #define PF_MAX AF_MAX
334
335 #if defined(_NETBSD_SOURCE)
336
337 #ifndef gid_t
338 typedef __gid_t gid_t; /* group id */
339 #define gid_t __gid_t
340 #endif
341
342 #ifndef uid_t
343 typedef __uid_t uid_t; /* user id */
344 #define uid_t __uid_t
345 #endif
346
347 /*
348 * Socket credentials.
349 */
350 struct sockcred {
351 uid_t sc_uid; /* real user id */
352 uid_t sc_euid; /* effective user id */
353 gid_t sc_gid; /* real group id */
354 gid_t sc_egid; /* effective group id */
355 int sc_ngroups; /* number of supplemental groups */
356 gid_t sc_groups[1]; /* variable length */
357 };
358
359 /*
360 * Compute size of a sockcred structure with groups.
361 */
362 #define SOCKCREDSIZE(ngrps) \
363 (/*CONSTCOND*/sizeof(struct sockcred) + (sizeof(gid_t) * \
364 ((ngrps) ? ((ngrps) - 1) : 0)))
365 #endif /* _NETBSD_SOURCE */
366
367
368 #if defined(_NETBSD_SOURCE)
369 /*
370 * Definitions for network related sysctl, CTL_NET.
371 *
372 * Second level is protocol family.
373 * Third level is protocol number.
374 *
375 * Further levels are defined by the individual families below.
376 */
377 #define NET_MAXID AF_MAX
378
379 #define CTL_NET_NAMES { \
380 { 0, 0 }, \
381 { "local", CTLTYPE_NODE }, \
382 { "inet", CTLTYPE_NODE }, \
383 { "implink", CTLTYPE_NODE }, \
384 { "pup", CTLTYPE_NODE }, \
385 { "chaos", CTLTYPE_NODE }, \
386 { "xerox_ns", CTLTYPE_NODE }, \
387 { "iso", CTLTYPE_NODE }, \
388 { "emca", CTLTYPE_NODE }, \
389 { "datakit", CTLTYPE_NODE }, \
390 { "ccitt", CTLTYPE_NODE }, \
391 { "ibm_sna", CTLTYPE_NODE }, \
392 { "decnet", CTLTYPE_NODE }, \
393 { "dec_dli", CTLTYPE_NODE }, \
394 { "lat", CTLTYPE_NODE }, \
395 { "hylink", CTLTYPE_NODE }, \
396 { "appletalk", CTLTYPE_NODE }, \
397 { "oroute", CTLTYPE_NODE }, \
398 { "link_layer", CTLTYPE_NODE }, \
399 { "xtp", CTLTYPE_NODE }, \
400 { "coip", CTLTYPE_NODE }, \
401 { "cnt", CTLTYPE_NODE }, \
402 { "rtip", CTLTYPE_NODE }, \
403 { "ipx", CTLTYPE_NODE }, \
404 { "inet6", CTLTYPE_NODE }, \
405 { "pip", CTLTYPE_NODE }, \
406 { "isdn", CTLTYPE_NODE }, \
407 { "natm", CTLTYPE_NODE }, \
408 { "arp", CTLTYPE_NODE }, \
409 { "key", CTLTYPE_NODE }, \
410 { "ieee80211", CTLTYPE_NODE }, \
411 { "mlps", CTLTYPE_NODE }, \
412 { "route", CTLTYPE_NODE }, \
413 }
414
415 struct kinfo_pcb {
416 __uint64_t ki_pcbaddr; /* PTR: pcb addr */
417 __uint64_t ki_ppcbaddr; /* PTR: ppcb addr */
418 __uint64_t ki_sockaddr; /* PTR: socket addr */
419
420 __uint32_t ki_family; /* INT: protocol family */
421 __uint32_t ki_type; /* INT: socket type */
422 __uint32_t ki_protocol; /* INT: protocol */
423 __uint32_t ki_pflags; /* INT: generic protocol flags */
424
425 __uint32_t ki_sostate; /* INT: socket state */
426 __uint32_t ki_prstate; /* INT: protocol state */
427 __int32_t ki_tstate; /* INT: tcp state */
428 __uint32_t ki_tflags; /* INT: tcp flags */
429
430 __uint64_t ki_rcvq; /* U_LONG: receive queue len */
431 __uint64_t ki_sndq; /* U_LONG: send queue len */
432
433 union {
434 struct sockaddr _kis_src; /* STRUCT: local address */
435 char _kis_pad[256 + 8]; /* pad to max addr length */
436 } ki_s;
437 union {
438 struct sockaddr _kid_dst; /* STRUCT: remote address */
439 char _kid_pad[256 + 8]; /* pad to max addr length */
440 } ki_d;
441
442 __uint64_t ki_inode; /* INO_T: fake inode number */
443 __uint64_t ki_vnode; /* PTR: if associated with file */
444 __uint64_t ki_conn; /* PTR: control block of peer */
445 __uint64_t ki_refs; /* PTR: referencing socket */
446 __uint64_t ki_nextref; /* PTR: link in refs list */
447 };
448
449 #define ki_src ki_s._kis_src
450 #define ki_dst ki_d._kid_dst
451 #define ki_spad ki_s._kis_pad
452 #define ki_dpad ki_d._kid_pad
453
454 #define PCB_SLOP 20
455 #define PCB_ALL 0
456
457 #endif /* _NETBSD_SOURCE */
458
459 #if defined(_NETBSD_SOURCE)
460 /*
461 * PF_ROUTE - Routing table
462 *
463 * Three additional levels are defined:
464 * Fourth: address family, 0 is wildcard
465 * Fifth: type of info, defined below
466 * Sixth: flag(s) to mask with for NET_RT_FLAGS
467 */
468 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
469 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
470 #define NET_RT_OOIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */
471 #define NET_RT_OIFLIST 4 /* survey interface list */
472 #define NET_RT_IFLIST 5
473 #define NET_RT_MAXID 6
474
475 #define CTL_NET_RT_NAMES { \
476 { 0, 0 }, \
477 { "dump", CTLTYPE_STRUCT }, \
478 { "flags", CTLTYPE_STRUCT }, \
479 { 0, 0 }, \
480 { 0, 0 }, \
481 { "iflist", CTLTYPE_STRUCT }, \
482 }
483 #endif /* _NETBSD_SOURCE */
484
485 /*
486 * Maximum queue length specifiable by listen(2).
487 */
488 #ifndef SOMAXCONN
489 #define SOMAXCONN 128
490 #endif
491
492 #include <sys/cdefs.h>
493
494 /*
495 * Message header for recvmsg and sendmsg calls.
496 * Used value-result for recvmsg, value only for sendmsg.
497 */
498 struct msghdr {
499 void *msg_name; /* optional address */
500 socklen_t msg_namelen; /* size of address */
501 struct iovec *msg_iov; /* scatter/gather array */
502 int msg_iovlen; /* # elements in msg_iov */
503 void *msg_control; /* ancillary data, see below */
504 socklen_t msg_controllen; /* ancillary data buffer len */
505 int msg_flags; /* flags on received message */
506 };
507
508 #define MSG_OOB 0x0001 /* process out-of-band data */
509 #define MSG_PEEK 0x0002 /* peek at incoming message */
510 #define MSG_DONTROUTE 0x0004 /* send without using routing tables */
511 #define MSG_EOR 0x0008 /* data completes record */
512 #define MSG_TRUNC 0x0010 /* data discarded before delivery */
513 #define MSG_CTRUNC 0x0020 /* control data lost before delivery */
514 #define MSG_WAITALL 0x0040 /* wait for full request or error */
515 #define MSG_DONTWAIT 0x0080 /* this message should be nonblocking */
516 #define MSG_BCAST 0x0100 /* this message was rcvd using link-level brdcst */
517 #define MSG_MCAST 0x0200 /* this message was rcvd using link-level mcast */
518 #define MSG_NOSIGNAL 0x0400 /* do not generate SIGPIPE on EOF */
519 #if defined(_NETBSD_SOURCE)
520 #define MSG_CMSG_CLOEXEC 0x0800 /* close on exec receiving fd */
521 #define MSG_NBIO 0x1000 /* use non-blocking I/O */
522 #define MSG_WAITFORONE 0x2000 /* recvmmsg() wait for one message */
523
524 struct mmsghdr {
525 struct msghdr msg_hdr;
526 unsigned int msg_len;
527 };
528 #endif
529
530 /* Extra flags used internally only */
531 #define MSG_USERFLAGS 0x0ffffff
532 #define MSG_NAMEMBUF 0x1000000 /* msg_name is an mbuf */
533 #define MSG_CONTROLMBUF 0x2000000 /* msg_control is an mbuf */
534 #define MSG_IOVUSRSPACE 0x4000000 /* msg_iov is in user space */
535 #define MSG_LENUSRSPACE 0x8000000 /* address length is in user space */
536
537 /*
538 * Header for ancillary data objects in msg_control buffer.
539 * Used for additional information with/about a datagram
540 * not expressible by flags. The format is a sequence
541 * of message elements headed by cmsghdr structures.
542 */
543 struct cmsghdr {
544 socklen_t cmsg_len; /* data byte count, including hdr */
545 int cmsg_level; /* originating protocol */
546 int cmsg_type; /* protocol-specific type */
547 /* followed by u_char cmsg_data[]; */
548 };
549
550 /*
551 * Alignment requirement for CMSG struct manipulation.
552 * This basically behaves the same as ALIGN() ARCH/include/param.h.
553 * We declare it separately for two reasons:
554 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
555 * idea of ALIGNBYTES at runtime.
556 * without (2), we can't guarantee binary compatibility in case of future
557 * changes in ALIGNBYTES.
558 */
559 #define __CMSG_ALIGN(n) (((n) + __ALIGNBYTES) & ~__ALIGNBYTES)
560
561 #ifdef _KERNEL
562 #define CMSG_ALIGN(n) __CMSG_ALIGN(n)
563 #endif
564
565 #define __CMSG_ASIZE __CMSG_ALIGN(sizeof(struct cmsghdr))
566 #define __CMSG_MSGNEXT(cmsg) \
567 (__CASTV(char *, cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len))
568 #define __CMSG_MSGEND(mhdr) \
569 (__CASTV(char *, (mhdr)->msg_control) + (mhdr)->msg_controllen)
570
571 /* given pointer to struct cmsghdr, return pointer to data */
572 #define CMSG_DATA(cmsg) (__CASTV(u_char *, cmsg) + __CMSG_ASIZE)
573 #define CCMSG_DATA(cmsg) (__CASTCV(const u_char *, cmsg) + __CMSG_ASIZE)
574
575 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
576 #define CMSG_NXTHDR(mhdr, cmsg) \
577 __CASTV(struct cmsghdr *, \
578 __CMSG_MSGNEXT(cmsg) + __CMSG_ASIZE > __CMSG_MSGEND(mhdr) ? 0 : \
579 __CMSG_MSGNEXT(cmsg))
580
581 /*
582 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
583 * an empty list for some reasons.
584 */
585 #define CMSG_FIRSTHDR(mhdr) \
586 __CASTV(struct cmsghdr *, \
587 (mhdr)->msg_controllen < sizeof(struct cmsghdr) ? 0 : \
588 (mhdr)->msg_control)
589
590 #define CMSG_SPACE(l) (__CMSG_ASIZE + __CMSG_ALIGN(l))
591 #define CMSG_LEN(l) (__CMSG_ASIZE + (l))
592
593 /* "Socket"-level control message types: */
594 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
595 #if defined(_NETBSD_SOURCE)
596 /* 0x02 timestamp (struct timeval50) */
597 #define SCM_CREDS 0x04 /* credentials (struct sockcred) */
598 #define SCM_TIMESTAMP 0x08 /* timestamp (struct timeval) */
599 #endif
600
601 /*
602 * Types of socket shutdown(2).
603 */
604 #define SHUT_RD 0 /* Disallow further receives. */
605 #define SHUT_WR 1 /* Disallow further sends. */
606 #define SHUT_RDWR 2 /* Disallow further sends/receives. */
607
608 #ifdef _KERNEL
609 static inline socklen_t
sockaddr_getlen(const struct sockaddr * sa)610 sockaddr_getlen(const struct sockaddr *sa)
611 {
612 return sa->sa_len;
613 }
614
615 __BEGIN_DECLS
616 struct sockaddr *sockaddr_copy(struct sockaddr *, socklen_t,
617 const struct sockaddr *);
618 struct sockaddr *sockaddr_externalize(struct sockaddr *, socklen_t,
619 const struct sockaddr *);
620 struct sockaddr *sockaddr_alloc(sa_family_t, socklen_t, int);
621 const void *sockaddr_const_addr(const struct sockaddr *, socklen_t *);
622 void *sockaddr_addr(struct sockaddr *, socklen_t *);
623 const struct sockaddr *sockaddr_any(const struct sockaddr *);
624 const struct sockaddr *sockaddr_any_by_family(int);
625 const void *sockaddr_anyaddr(const struct sockaddr *, socklen_t *);
626 int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *);
627 struct sockaddr *sockaddr_dup(const struct sockaddr *, int);
628 int sockaddr_format(const struct sockaddr *, char *, size_t);
629 void sockaddr_free(struct sockaddr *);
630 __END_DECLS
631 #endif /* _KERNEL */
632
633 #ifndef _KERNEL
634
635 __BEGIN_DECLS
636 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
637 int bind(int, const struct sockaddr *, socklen_t);
638 int connect(int, const struct sockaddr *, socklen_t);
639 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
640 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
641 int getsockopt(int, int, int, void *__restrict, socklen_t * __restrict);
642 int listen(int, int);
643 int paccept(int, struct sockaddr * __restrict, socklen_t * __restrict,
644 const sigset_t * __restrict, int);
645 ssize_t recv(int, void *, size_t, int);
646 ssize_t recvfrom(int, void *__restrict, size_t, int,
647 struct sockaddr * __restrict, socklen_t * __restrict);
648 ssize_t recvmsg(int, struct msghdr *, int);
649 ssize_t send(int, const void *, size_t, int);
650 ssize_t sendto(int, const void *,
651 size_t, int, const struct sockaddr *, socklen_t);
652 ssize_t sendmsg(int, const struct msghdr *, int);
653 int setsockopt(int, int, int, const void *, socklen_t);
654 int shutdown(int, int);
655 int sockatmark(int);
656 int socket(int, int, int)
657 #if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)
658 __RENAME(__socket30)
659 #endif
660 ;
661 int socketpair(int, int, int, int *);
662
663 #if defined(_NETBSD_SOURCE)
664 int sendmmsg(int, struct mmsghdr *, unsigned int, unsigned int);
665 struct timespec;
666 int recvmmsg(int, struct mmsghdr *, unsigned int, unsigned int,
667 struct timespec *);
668 #endif
669 __END_DECLS
670 #endif /* !_KERNEL */
671
672 #endif /* !_SYS_SOCKET_H_ */
673