2 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)socket.h 8.4 (Berkeley) 2/21/94
34 * $FreeBSD: src/sys/sys/socket.h,v 1.39.2.7 2001/07/03 11:02:01 ume Exp $
35 * $DragonFly: src/sys/sys/socket.h,v 1.23 2008/11/10 18:16:51 dillon Exp $
38 #ifndef _SYS_SOCKET_H_
39 #define _SYS_SOCKET_H_
41 #include <sys/_iovec.h>
44 #include <sys/types.h>
46 #ifndef _MACHINE_STDINT_H_
47 #include <machine/stdint.h>
50 #define _NO_NAMESPACE_POLLUTION
51 #include <machine/param.h>
52 #undef _NO_NAMESPACE_POLLUTION
55 * Definitions related to sockets: types, address families, options.
61 typedef __uint8_t sa_family_t;
63 #ifndef _SOCKLEN_T_DECLARED
64 #define _SOCKLEN_T_DECLARED
65 typedef __socklen_t socklen_t;
72 #define SOCK_STREAM 1 /* stream socket */
73 #define SOCK_DGRAM 2 /* datagram socket */
74 #define SOCK_RAW 3 /* raw-protocol interface */
75 #define SOCK_RDM 4 /* reliably-delivered message */
76 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
79 * Option flags per-socket.
81 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
82 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
83 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
84 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
85 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
86 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
87 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
88 #define SO_LINGER 0x0080 /* linger on close if data present */
89 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
90 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
91 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
92 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
95 * Additional options, not kept in so_options.
97 #define SO_SNDBUF 0x1001 /* send buffer size */
98 #define SO_RCVBUF 0x1002 /* receive buffer size */
99 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
100 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
101 #define SO_SNDTIMEO 0x1005 /* send timeout */
102 #define SO_RCVTIMEO 0x1006 /* receive timeout */
103 #define SO_ERROR 0x1007 /* get error status and clear */
104 #define SO_TYPE 0x1008 /* get socket type */
105 /*efine SO_PRIVSTATE 0x1009 get/deny privileged state */
108 * Structure used for manipulating linger option.
111 int l_onoff; /* option on/off */
112 int l_linger; /* linger time */
115 struct accept_filter_arg {
121 * Level number for (get/set)sockopt() to apply to socket itself.
123 #define SOL_SOCKET 0xffff /* options for socket level */
128 #define AF_UNSPEC 0 /* unspecified */
129 #define AF_LOCAL 1 /* local to host (pipes, portals) */
130 #define AF_UNIX AF_LOCAL /* backward compatibility */
131 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
132 #define AF_IMPLINK 3 /* arpanet imp addresses */
133 #define AF_PUP 4 /* pup protocols: e.g. BSP */
134 #define AF_CHAOS 5 /* mit CHAOS protocols */
135 #define AF_NS 6 /* XEROX NS protocols */
136 #define AF_ISO 7 /* ISO protocols */
137 #define AF_OSI AF_ISO
138 #define AF_ECMA 8 /* European computer manufacturers */
139 #define AF_DATAKIT 9 /* datakit protocols */
140 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
141 #define AF_SNA 11 /* IBM SNA */
142 #define AF_DECnet 12 /* DECnet */
143 #define AF_DLI 13 /* DEC Direct data link interface */
144 #define AF_LAT 14 /* LAT */
145 #define AF_HYLINK 15 /* NSC Hyperchannel */
146 #define AF_APPLETALK 16 /* Apple Talk */
147 #define AF_ROUTE 17 /* Internal Routing Protocol */
148 #define AF_LINK 18 /* Link layer interface */
149 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
150 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
151 #define AF_CNT 21 /* Computer Network Technology */
152 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
153 #define AF_IPX 23 /* Novell Internet Protocol */
154 #define AF_SIP 24 /* Simple Internet Protocol */
155 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
156 #define AF_ISDN 26 /* Integrated Services Digital Network*/
157 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
158 #define pseudo_AF_KEY 27 /* Internal key-management function */
159 #define AF_INET6 28 /* IPv6 */
160 #define AF_NATM 29 /* native ATM access */
161 #define AF_ATM 30 /* ATM */
162 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
163 * in interface output routine
165 #define AF_NETGRAPH 32 /* Netgraph sockets */
166 #define AF_BLUETOOTH 33 /* Bluetooth */
167 #define AF_MPLS 34 /* Multi-Protocol Label Switching */
168 #define AF_IEEE80211 35 /* IEEE 802.11 protocol */
173 * Structure used by kernel to store most
177 __uint8_t sa_len; /* total length */
178 sa_family_t sa_family; /* address family */
179 char sa_data[14]; /* actually longer; address value */
181 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
185 #ifndef _SYS_LIBKERN_H_
186 #include <sys/libkern.h> /* for bcmp() */
189 static __inline boolean_t
190 sa_equal(const struct sockaddr *a1, const struct sockaddr *a2)
192 return (bcmp(a1, a2, a1->sa_len) == 0);
197 * Structure used by kernel to pass protocol
198 * information in raw sockets.
201 __uint16_t sp_family; /* address family */
202 __uint16_t sp_protocol; /* protocol */
206 * RFC 2553: protocol-independent placeholder for socket addresses
208 #define _SS_MAXSIZE 128
209 #define _SS_ALIGNSIZE (sizeof(int64_t))
210 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) - sizeof(sa_family_t))
211 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) - sizeof(sa_family_t) - \
212 _SS_PAD1SIZE - _SS_ALIGNSIZE)
214 struct sockaddr_storage {
215 __uint8_t ss_len; /* address length */
216 sa_family_t ss_family; /* address family */
217 char __ss_pad1[_SS_PAD1SIZE];
218 __int64_t __ss_align; /* force desired structure storage alignment */
219 char __ss_pad2[_SS_PAD2SIZE];
223 * Protocol families, same as address families for now.
225 #define PF_UNSPEC AF_UNSPEC
226 #define PF_LOCAL AF_LOCAL
227 #define PF_UNIX PF_LOCAL /* backward compatibility */
228 #define PF_INET AF_INET
229 #define PF_IMPLINK AF_IMPLINK
230 #define PF_PUP AF_PUP
231 #define PF_CHAOS AF_CHAOS
233 #define PF_ISO AF_ISO
234 #define PF_OSI AF_ISO
235 #define PF_ECMA AF_ECMA
236 #define PF_DATAKIT AF_DATAKIT
237 #define PF_CCITT AF_CCITT
238 #define PF_SNA AF_SNA
239 #define PF_DECnet AF_DECnet
240 #define PF_DLI AF_DLI
241 #define PF_LAT AF_LAT
242 #define PF_HYLINK AF_HYLINK
243 #define PF_APPLETALK AF_APPLETALK
244 #define PF_ROUTE AF_ROUTE
245 #define PF_LINK AF_LINK
246 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
247 #define PF_COIP AF_COIP
248 #define PF_CNT AF_CNT
249 #define PF_SIP AF_SIP
250 #define PF_IPX AF_IPX /* same format as AF_NS */
251 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
252 #define PF_PIP pseudo_AF_PIP
253 #define PF_ISDN AF_ISDN
254 #define PF_KEY pseudo_AF_KEY
255 #define PF_INET6 AF_INET6
256 #define PF_NATM AF_NATM
257 #define PF_ATM AF_ATM
258 #define PF_NETGRAPH AF_NETGRAPH
259 #define PF_BLUETOOTH AF_BLUETOOTH
261 #define PF_MAX AF_MAX
264 * Definitions for network related sysctl, CTL_NET.
266 * Second level is protocol family.
267 * Third level is protocol number.
269 * Further levels are defined by the individual families below.
271 #define NET_MAXID AF_MAX
273 #define CTL_NET_NAMES { \
275 { "unix", CTLTYPE_NODE }, \
276 { "inet", CTLTYPE_NODE }, \
277 { "implink", CTLTYPE_NODE }, \
278 { "pup", CTLTYPE_NODE }, \
279 { "chaos", CTLTYPE_NODE }, \
280 { "xerox_ns", CTLTYPE_NODE }, \
281 { "iso", CTLTYPE_NODE }, \
282 { "emca", CTLTYPE_NODE }, \
283 { "datakit", CTLTYPE_NODE }, \
284 { "ccitt", CTLTYPE_NODE }, \
285 { "ibm_sna", CTLTYPE_NODE }, \
286 { "decnet", CTLTYPE_NODE }, \
287 { "dec_dli", CTLTYPE_NODE }, \
288 { "lat", CTLTYPE_NODE }, \
289 { "hylink", CTLTYPE_NODE }, \
290 { "appletalk", CTLTYPE_NODE }, \
291 { "route", CTLTYPE_NODE }, \
292 { "link_layer", CTLTYPE_NODE }, \
293 { "xtp", CTLTYPE_NODE }, \
294 { "coip", CTLTYPE_NODE }, \
295 { "cnt", CTLTYPE_NODE }, \
296 { "rtip", CTLTYPE_NODE }, \
297 { "ipx", CTLTYPE_NODE }, \
298 { "sip", CTLTYPE_NODE }, \
299 { "pip", CTLTYPE_NODE }, \
300 { "isdn", CTLTYPE_NODE }, \
301 { "key", CTLTYPE_NODE }, \
302 { "inet6", CTLTYPE_NODE }, \
303 { "natm", CTLTYPE_NODE }, \
304 { "atm", CTLTYPE_NODE }, \
305 { "hdrcomplete", CTLTYPE_NODE }, \
306 { "netgraph", CTLTYPE_NODE }, \
307 { "bluetooth", CTLTYPE_NODE}, \
311 * PF_ROUTE - Routing table
313 * Three additional levels are defined:
314 * Fourth: address family, 0 is wildcard
315 * Fifth: type of info, defined below
316 * Sixth: flag(s) to mask with for NET_RT_FLAGS
318 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
319 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
320 #define NET_RT_IFLIST 3 /* survey interface list */
321 #define NET_RT_MAXID 4
323 #define CTL_NET_RT_NAMES { \
325 { "dump", CTLTYPE_STRUCT }, \
326 { "flags", CTLTYPE_STRUCT }, \
327 { "iflist", CTLTYPE_STRUCT }, \
331 * Maximum queue length specifiable by listen.
333 #define SOMAXCONN 128
336 * Maximum setsockopt buffer size
338 #define SOMAXOPT_SIZE 65536
341 * Message header for recvmsg and sendmsg calls.
342 * Used value-result for recvmsg, value only for sendmsg.
345 void *msg_name; /* optional address */
346 socklen_t msg_namelen; /* size of address */
347 struct iovec *msg_iov; /* scatter/gather array */
348 int msg_iovlen; /* # elements in msg_iov */
349 void *msg_control; /* ancillary data, see below */
350 socklen_t msg_controllen; /* ancillary data buffer len */
351 int msg_flags; /* flags on received message */
354 #define MSG_OOB 0x00000001 /* process out-of-band data */
355 #define MSG_PEEK 0x00000002 /* peek at incoming message */
356 #define MSG_DONTROUTE 0x00000004 /* send without using routing tables */
357 #define MSG_EOR 0x00000008 /* data completes record */
358 #define MSG_TRUNC 0x00000010 /* data discarded before delivery */
359 #define MSG_CTRUNC 0x00000020 /* control data lost before delivery */
360 #define MSG_WAITALL 0x00000040 /* wait for full request or error */
361 #define MSG_DONTWAIT 0x00000080 /* this message should be nonblocking */
362 #define MSG_EOF 0x00000100 /* data completes connection */
363 #define MSG_NOTIFICATION 0x00000200 /* notification message */
366 * These override FIONBIO. MSG_FNONBLOCKING is functionally equivalent to
369 #define MSG_FBLOCKING 0x00010000 /* force blocking operation */
370 #define MSG_FNONBLOCKING 0x00020000 /* force non-blocking operation */
372 #define MSG_FMASK 0xFFFF0000 /* force mask */
375 * Header for ancillary data objects in msg_control buffer.
376 * Used for additional information with/about a datagram
377 * not expressible by flags. The format is a sequence
378 * of message elements headed by cmsghdr structures.
381 socklen_t cmsg_len; /* data byte count, including hdr */
382 int cmsg_level; /* originating protocol */
383 int cmsg_type; /* protocol-specific type */
384 /* followed by u_char cmsg_data[]; */
388 * While we may have more groups than this, the cmsgcred struct must
389 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
392 #define CMGROUP_MAX 16
395 * Credentials structure, used to verify the identity of a peer
396 * process that has sent us a message. This is allocated by the
397 * peer process but filled in by the kernel. This prevents the
398 * peer from lying about its identity. (Note that cmcred_groups[0]
399 * is the effective GID.)
402 pid_t cmcred_pid; /* PID of sending process */
403 uid_t cmcred_uid; /* real UID of sending process */
404 uid_t cmcred_euid; /* effective UID of sending process */
405 gid_t cmcred_gid; /* real GID of sending process */
406 short cmcred_ngroups; /* number or groups */
407 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
410 /* given pointer to struct cmsghdr, return pointer to data */
411 #define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \
412 _ALIGN(sizeof(struct cmsghdr)))
414 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
415 #define CMSG_NXTHDR(mhdr, cmsg) \
416 (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
417 _ALIGN(sizeof(struct cmsghdr)) > \
418 (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
420 (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
423 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
424 * an empty list for some reasons.
426 #define CMSG_FIRSTHDR(mhdr) \
427 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
428 (struct cmsghdr *)(mhdr)->msg_control : \
431 /* RFC 2292 additions */
433 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
434 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
437 #define CMSG_ALIGN(n) _ALIGN(n)
440 /* "Socket"-level control message types: */
441 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
442 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
443 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
446 * howto arguments for shutdown(2), specified by Posix.1g.
448 #define SHUT_RD 0 /* shut down the reading side */
449 #define SHUT_WR 1 /* shut down the writing side */
450 #define SHUT_RDWR 2 /* shut down both sides */
453 * sendfile(2) header/trailer struct
456 struct iovec *headers; /* pointer to an array of header struct iovec's */
457 int hdr_cnt; /* number of header iovec's */
458 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
459 int trl_cnt; /* number of trailer iovec's */
462 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL)
464 #ifndef _SYS_CDEFS_H_
465 #include <sys/cdefs.h>
469 int accept (int, struct sockaddr *, socklen_t *);
470 int extaccept (int, int, struct sockaddr *, socklen_t *);
471 int bind (int, const struct sockaddr *, socklen_t);
472 int connect (int, const struct sockaddr *, socklen_t);
473 int extconnect (int, int, struct sockaddr *, socklen_t);
474 int getpeername (int, struct sockaddr *, socklen_t *);
475 int getsockname (int, struct sockaddr *, socklen_t *);
476 int getsockopt (int, int, int, void *, socklen_t *);
477 int listen (int, int);
478 ssize_t recv (int, void *, size_t, int);
479 ssize_t recvfrom (int, void *, size_t, int, struct sockaddr *, socklen_t *);
480 ssize_t recvmsg (int, struct msghdr *, int);
481 ssize_t send (int, const void *, size_t, int);
482 ssize_t sendto (int, const void *,
483 size_t, int, const struct sockaddr *, socklen_t);
484 ssize_t sendmsg (int, const struct msghdr *, int);
485 int sendfile (int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
486 int setsockopt (int, int, int, const void *, socklen_t);
487 int shutdown (int, int);
488 int socketpair (int, int, int, int *);
490 void pfctlinput (int, struct sockaddr *);
493 #endif /* !_KERNEL */
495 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL)
496 #ifndef _SYS_CDEFS_H_
497 #include <sys/cdefs.h>
501 int socket (int, int, int);
503 #endif /* !_KERNEL || _KERNEL_VIRTUAL */
505 #endif /* !_SYS_SOCKET_H_ */