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
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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
37 #ifndef _SYS_SOCKET_H_
38 #define _SYS_SOCKET_H_
40 #include <sys/_types.h>
41 #define _NO_NAMESPACE_POLLUTION
42 #include <machine/param.h>
43 #undef _NO_NAMESPACE_POLLUTION
46 * Definitions related to sockets: types, address families, options.
52 #ifndef _SA_FAMILY_T_DECLARED
53 typedef __sa_family_t sa_family_t;
54 #define _SA_FAMILY_T_DECLARED
57 #ifndef _SOCKLEN_T_DECLARED
58 typedef __socklen_t socklen_t;
59 #define _SOCKLEN_T_DECLARED
65 #define SOCK_STREAM 1 /* stream socket */
66 #define SOCK_DGRAM 2 /* datagram socket */
67 #define SOCK_RAW 3 /* raw-protocol interface */
68 #define SOCK_RDM 4 /* reliably-delivered message */
69 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
72 * Option flags per-socket.
74 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
75 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
76 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
77 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
78 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
79 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
80 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
81 #define SO_LINGER 0x0080 /* linger on close if data present */
82 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
83 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
84 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
85 #define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
86 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
89 * Additional options, not kept in so_options.
91 #define SO_SNDBUF 0x1001 /* send buffer size */
92 #define SO_RCVBUF 0x1002 /* receive buffer size */
93 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
94 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
95 #define SO_SNDTIMEO 0x1005 /* send timeout */
96 #define SO_RCVTIMEO 0x1006 /* receive timeout */
97 #define SO_ERROR 0x1007 /* get error status and clear */
98 #define SO_TYPE 0x1008 /* get socket type */
99 #define SO_LABEL 0x1009 /* socket's MAC label */
100 #define SO_PEERLABEL 0x1010 /* socket's peer's MAC label */
103 * Structure used for manipulating linger option.
106 int l_onoff; /* option on/off */
107 int l_linger; /* linger time */
110 struct accept_filter_arg {
116 * Level number for (get/set)sockopt() to apply to socket itself.
118 #define SOL_SOCKET 0xffff /* options for socket level */
123 #define AF_UNSPEC 0 /* unspecified */
124 #define AF_LOCAL 1 /* local to host (pipes, portals) */
125 #define AF_UNIX AF_LOCAL /* backward compatibility */
126 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
127 #define AF_IMPLINK 3 /* arpanet imp addresses */
128 #define AF_PUP 4 /* pup protocols: e.g. BSP */
129 #define AF_CHAOS 5 /* mit CHAOS protocols */
130 #define AF_NS 6 /* XEROX NS protocols */
131 #define AF_ISO 7 /* ISO protocols */
132 #define AF_OSI AF_ISO
133 #define AF_ECMA 8 /* European computer manufacturers */
134 #define AF_DATAKIT 9 /* datakit protocols */
135 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
136 #define AF_SNA 11 /* IBM SNA */
137 #define AF_DECnet 12 /* DECnet */
138 #define AF_DLI 13 /* DEC Direct data link interface */
139 #define AF_LAT 14 /* LAT */
140 #define AF_HYLINK 15 /* NSC Hyperchannel */
141 #define AF_APPLETALK 16 /* Apple Talk */
142 #define AF_ROUTE 17 /* Internal Routing Protocol */
143 #define AF_LINK 18 /* Link layer interface */
144 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
145 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
146 #define AF_CNT 21 /* Computer Network Technology */
147 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
148 #define AF_IPX 23 /* Novell Internet Protocol */
149 #define AF_SIP 24 /* Simple Internet Protocol */
150 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
151 #define AF_ISDN 26 /* Integrated Services Digital Network*/
152 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
153 #define pseudo_AF_KEY 27 /* Internal key-management function */
154 #define AF_INET6 28 /* IPv6 */
155 #define AF_NATM 29 /* native ATM access */
156 #define AF_ATM 30 /* ATM */
157 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
158 * in interface output routine
160 #define AF_NETGRAPH 32 /* Netgraph sockets */
161 #define AF_SLOW 33 /* 802.3ad slow protocol */
162 #define AF_SCLUSTER 34 /* Sitara cluster protocol */
166 * Structure used by kernel to store most
170 u_char sa_len; /* total length */
171 sa_family_t sa_family; /* address family */
172 char sa_data[14]; /* actually longer; address value */
174 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
177 * Structure used by kernel to pass protocol
178 * information in raw sockets.
181 u_short sp_family; /* address family */
182 u_short sp_protocol; /* protocol */
186 * RFC 2553: protocol-independent placeholder for socket addresses
188 #define _SS_MAXSIZE 128U
189 #define _SS_ALIGNSIZE (sizeof(int64_t))
190 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(sa_family_t))
191 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(u_char) - sizeof(sa_family_t) - \
192 _SS_PAD1SIZE - _SS_ALIGNSIZE)
194 struct sockaddr_storage {
195 u_char ss_len; /* address length */
196 sa_family_t ss_family; /* address family */
197 char __ss_pad1[_SS_PAD1SIZE];
198 int64_t __ss_align; /* force desired structure storage alignment */
199 char __ss_pad2[_SS_PAD2SIZE];
203 * Protocol families, same as address families for now.
205 #define PF_UNSPEC AF_UNSPEC
206 #define PF_LOCAL AF_LOCAL
207 #define PF_UNIX PF_LOCAL /* backward compatibility */
208 #define PF_INET AF_INET
209 #define PF_IMPLINK AF_IMPLINK
210 #define PF_PUP AF_PUP
211 #define PF_CHAOS AF_CHAOS
213 #define PF_ISO AF_ISO
214 #define PF_OSI AF_ISO
215 #define PF_ECMA AF_ECMA
216 #define PF_DATAKIT AF_DATAKIT
217 #define PF_CCITT AF_CCITT
218 #define PF_SNA AF_SNA
219 #define PF_DECnet AF_DECnet
220 #define PF_DLI AF_DLI
221 #define PF_LAT AF_LAT
222 #define PF_HYLINK AF_HYLINK
223 #define PF_APPLETALK AF_APPLETALK
224 #define PF_ROUTE AF_ROUTE
225 #define PF_LINK AF_LINK
226 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
227 #define PF_COIP AF_COIP
228 #define PF_CNT AF_CNT
229 #define PF_SIP AF_SIP
230 #define PF_IPX AF_IPX /* same format as AF_NS */
231 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
232 #define PF_PIP pseudo_AF_PIP
233 #define PF_ISDN AF_ISDN
234 #define PF_KEY pseudo_AF_KEY
235 #define PF_INET6 AF_INET6
236 #define PF_NATM AF_NATM
237 #define PF_ATM AF_ATM
238 #define PF_NETGRAPH AF_NETGRAPH
239 #define PF_SLOW AF_SLOW
240 #define PF_SCLUSTER AF_SCLUSTER
242 #define PF_MAX AF_MAX
245 * Definitions for network related sysctl, CTL_NET.
247 * Second level is protocol family.
248 * Third level is protocol number.
250 * Further levels are defined by the individual families below.
252 #define NET_MAXID AF_MAX
254 #define CTL_NET_NAMES { \
256 { "unix", CTLTYPE_NODE }, \
257 { "inet", CTLTYPE_NODE }, \
258 { "implink", CTLTYPE_NODE }, \
259 { "pup", CTLTYPE_NODE }, \
260 { "chaos", CTLTYPE_NODE }, \
261 { "xerox_ns", CTLTYPE_NODE }, \
262 { "iso", CTLTYPE_NODE }, \
263 { "emca", CTLTYPE_NODE }, \
264 { "datakit", CTLTYPE_NODE }, \
265 { "ccitt", CTLTYPE_NODE }, \
266 { "ibm_sna", CTLTYPE_NODE }, \
267 { "decnet", CTLTYPE_NODE }, \
268 { "dec_dli", CTLTYPE_NODE }, \
269 { "lat", CTLTYPE_NODE }, \
270 { "hylink", CTLTYPE_NODE }, \
271 { "appletalk", CTLTYPE_NODE }, \
272 { "route", CTLTYPE_NODE }, \
273 { "link_layer", CTLTYPE_NODE }, \
274 { "xtp", CTLTYPE_NODE }, \
275 { "coip", CTLTYPE_NODE }, \
276 { "cnt", CTLTYPE_NODE }, \
277 { "rtip", CTLTYPE_NODE }, \
278 { "ipx", CTLTYPE_NODE }, \
279 { "sip", CTLTYPE_NODE }, \
280 { "pip", CTLTYPE_NODE }, \
281 { "isdn", CTLTYPE_NODE }, \
282 { "key", CTLTYPE_NODE }, \
283 { "inet6", CTLTYPE_NODE }, \
284 { "natm", CTLTYPE_NODE }, \
285 { "atm", CTLTYPE_NODE }, \
286 { "hdrcomplete", CTLTYPE_NODE }, \
287 { "netgraph", CTLTYPE_NODE }, \
288 { "snp", CTLTYPE_NODE }, \
289 { "scp", CTLTYPE_NODE }, \
293 * PF_ROUTE - Routing table
295 * Three additional levels are defined:
296 * Fourth: address family, 0 is wildcard
297 * Fifth: type of info, defined below
298 * Sixth: flag(s) to mask with for NET_RT_FLAGS
300 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
301 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
302 #define NET_RT_IFLIST 3 /* survey interface list */
303 #define NET_RT_MAXID 4
305 #define CTL_NET_RT_NAMES { \
307 { "dump", CTLTYPE_STRUCT }, \
308 { "flags", CTLTYPE_STRUCT }, \
309 { "iflist", CTLTYPE_STRUCT }, \
313 * Maximum queue length specifiable by listen.
315 #define SOMAXCONN 128
318 * Message header for recvmsg and sendmsg calls.
319 * Used value-result for recvmsg, value only for sendmsg.
322 void *msg_name; /* optional address */
323 socklen_t msg_namelen; /* size of address */
324 struct iovec *msg_iov; /* scatter/gather array */
325 int msg_iovlen; /* # elements in msg_iov */
326 void *msg_control; /* ancillary data, see below */
327 socklen_t msg_controllen; /* ancillary data buffer len */
328 int msg_flags; /* flags on received message */
331 #define MSG_OOB 0x1 /* process out-of-band data */
332 #define MSG_PEEK 0x2 /* peek at incoming message */
333 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
334 #define MSG_EOR 0x8 /* data completes record */
335 #define MSG_TRUNC 0x10 /* data discarded before delivery */
336 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
337 #define MSG_WAITALL 0x40 /* wait for full request or error */
338 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
339 #define MSG_EOF 0x100 /* data completes connection */
340 #define MSG_COMPAT 0x8000 /* used in sendit() */
343 * Header for ancillary data objects in msg_control buffer.
344 * Used for additional information with/about a datagram
345 * not expressible by flags. The format is a sequence
346 * of message elements headed by cmsghdr structures.
349 socklen_t cmsg_len; /* data byte count, including hdr */
350 int cmsg_level; /* originating protocol */
351 int cmsg_type; /* protocol-specific type */
352 /* followed by u_char cmsg_data[]; */
356 * While we may have more groups than this, the cmsgcred struct must
357 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
360 #define CMGROUP_MAX 16
363 * Credentials structure, used to verify the identity of a peer
364 * process that has sent us a message. This is allocated by the
365 * peer process but filled in by the kernel. This prevents the
366 * peer from lying about its identity. (Note that cmcred_groups[0]
367 * is the effective GID.)
370 pid_t cmcred_pid; /* PID of sending process */
371 uid_t cmcred_uid; /* real UID of sending process */
372 uid_t cmcred_euid; /* effective UID of sending process */
373 gid_t cmcred_gid; /* real GID of sending process */
374 short cmcred_ngroups; /* number or groups */
375 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
378 /* given pointer to struct cmsghdr, return pointer to data */
379 #define CMSG_DATA(cmsg) ((u_char *)(cmsg) + \
380 _ALIGN(sizeof(struct cmsghdr)))
382 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
383 #define CMSG_NXTHDR(mhdr, cmsg) \
384 (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
385 _ALIGN(sizeof(struct cmsghdr)) > \
386 (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
387 (struct cmsghdr *)NULL : \
388 (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
390 #define CMSG_FIRSTHDR(mhdr) ((struct cmsghdr *)(mhdr)->msg_control)
392 /* RFC 2292 additions */
394 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
395 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
398 #define CMSG_ALIGN(n) _ALIGN(n)
401 /* "Socket"-level control message types: */
402 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
403 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
404 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
407 * 4.3 compat sockaddr, move to compat file later
410 u_short sa_family; /* address family */
411 char sa_data[14]; /* up to 14 bytes of direct address */
415 * 4.3-compat message header (move to compat file later).
418 caddr_t msg_name; /* optional address */
419 int msg_namelen; /* size of address */
420 struct iovec *msg_iov; /* scatter/gather array */
421 int msg_iovlen; /* # elements in msg_iov */
422 caddr_t msg_accrights; /* access rights sent/received */
423 int msg_accrightslen;
427 * howto arguments for shutdown(2), specified by Posix.1g.
429 #define SHUT_RD 0 /* shut down the reading side */
430 #define SHUT_WR 1 /* shut down the writing side */
431 #define SHUT_RDWR 2 /* shut down both sides */
434 * sendfile(2) header/trailer struct
437 struct iovec *headers; /* pointer to an array of header struct iovec's */
438 int hdr_cnt; /* number of header iovec's */
439 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
440 int trl_cnt; /* number of trailer iovec's */
445 #include <sys/cdefs.h>
448 int accept(int, struct sockaddr *, socklen_t *);
449 int bind(int, const struct sockaddr *, socklen_t);
450 int connect(int, const struct sockaddr *, socklen_t);
451 int getpeername(int, struct sockaddr *, socklen_t *);
452 int getsockname(int, struct sockaddr *, socklen_t *);
453 int getsockopt(int, int, int, void *, socklen_t *);
454 int listen(int, int);
455 ssize_t recv(int, void *, size_t, int);
456 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
457 ssize_t recvmsg(int, struct msghdr *, int);
458 ssize_t send(int, const void *, size_t, int);
459 ssize_t sendto(int, const void *,
460 size_t, int, const struct sockaddr *, socklen_t);
461 ssize_t sendmsg(int, const struct msghdr *, int);
462 int sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
463 int setsockopt(int, int, int, const void *, socklen_t);
464 int shutdown(int, int);
465 int socket(int, int, int);
466 int socketpair(int, int, int, int *);
469 #endif /* !_KERNEL */
471 #endif /* !_SYS_SOCKET_H_ */