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
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9 * notice, this list of conditions and the following disclaimer.
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11 * notice, this list of conditions and the following disclaimer in the
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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
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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 1.8 2003/11/15 19:28:42 asmodai Exp $
38 #ifndef _SYS_SOCKET_H_
39 #define _SYS_SOCKET_H_
41 #ifndef _MACHINE_STDINT_H_
42 #include <machine/stdint.h>
45 #define _NO_NAMESPACE_POLLUTION
46 #include <machine/param.h>
47 #undef _NO_NAMESPACE_POLLUTION
50 * Definitions related to sockets: types, address families, options.
56 typedef __uint8_t sa_family_t;
58 #ifndef _SOCKLEN_T_DECLARED
59 #define _SOCKLEN_T_DECLARED
60 typedef __socklen_t socklen_t;
67 #define SOCK_STREAM 1 /* stream socket */
68 #define SOCK_DGRAM 2 /* datagram socket */
69 #define SOCK_RAW 3 /* raw-protocol interface */
70 #define SOCK_RDM 4 /* reliably-delivered message */
71 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
74 * Option flags per-socket.
76 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
77 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
78 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
79 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
80 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
81 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
82 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
83 #define SO_LINGER 0x0080 /* linger on close if data present */
84 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
85 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
86 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
87 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
90 * Additional options, not kept in so_options.
92 #define SO_SNDBUF 0x1001 /* send buffer size */
93 #define SO_RCVBUF 0x1002 /* receive buffer size */
94 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
95 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
96 #define SO_SNDTIMEO 0x1005 /* send timeout */
97 #define SO_RCVTIMEO 0x1006 /* receive timeout */
98 #define SO_ERROR 0x1007 /* get error status and clear */
99 #define SO_TYPE 0x1008 /* get socket type */
100 /*efine SO_PRIVSTATE 0x1009 get/deny privileged state */
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 */
165 * Structure used by kernel to store most
169 __uint8_t sa_len; /* total length */
170 sa_family_t sa_family; /* address family */
171 char sa_data[14]; /* actually longer; address value */
173 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
176 * Structure used by kernel to pass protocol
177 * information in raw sockets.
180 __uint16_t sp_family; /* address family */
181 __uint16_t sp_protocol; /* protocol */
185 * RFC 2553: protocol-independent placeholder for socket addresses
187 #define _SS_MAXSIZE 128
188 #define _SS_ALIGNSIZE (sizeof(int64_t))
189 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(sa_family_t))
190 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(u_char) - sizeof(sa_family_t) - \
191 _SS_PAD1SIZE - _SS_ALIGNSIZE)
193 struct sockaddr_storage {
194 __uint8_t ss_len; /* address length */
195 sa_family_t ss_family; /* address family */
196 char __ss_pad1[_SS_PAD1SIZE];
197 __int64_t __ss_align; /* force desired structure storage alignment */
198 char __ss_pad2[_SS_PAD2SIZE];
202 * Protocol families, same as address families for now.
204 #define PF_UNSPEC AF_UNSPEC
205 #define PF_LOCAL AF_LOCAL
206 #define PF_UNIX PF_LOCAL /* backward compatibility */
207 #define PF_INET AF_INET
208 #define PF_IMPLINK AF_IMPLINK
209 #define PF_PUP AF_PUP
210 #define PF_CHAOS AF_CHAOS
212 #define PF_ISO AF_ISO
213 #define PF_OSI AF_ISO
214 #define PF_ECMA AF_ECMA
215 #define PF_DATAKIT AF_DATAKIT
216 #define PF_CCITT AF_CCITT
217 #define PF_SNA AF_SNA
218 #define PF_DECnet AF_DECnet
219 #define PF_DLI AF_DLI
220 #define PF_LAT AF_LAT
221 #define PF_HYLINK AF_HYLINK
222 #define PF_APPLETALK AF_APPLETALK
223 #define PF_ROUTE AF_ROUTE
224 #define PF_LINK AF_LINK
225 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
226 #define PF_COIP AF_COIP
227 #define PF_CNT AF_CNT
228 #define PF_SIP AF_SIP
229 #define PF_IPX AF_IPX /* same format as AF_NS */
230 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
231 #define PF_PIP pseudo_AF_PIP
232 #define PF_ISDN AF_ISDN
233 #define PF_KEY pseudo_AF_KEY
234 #define PF_INET6 AF_INET6
235 #define PF_NATM AF_NATM
236 #define PF_ATM AF_ATM
237 #define PF_NETGRAPH AF_NETGRAPH
239 #define PF_MAX AF_MAX
242 * Definitions for network related sysctl, CTL_NET.
244 * Second level is protocol family.
245 * Third level is protocol number.
247 * Further levels are defined by the individual families below.
249 #define NET_MAXID AF_MAX
251 #define CTL_NET_NAMES { \
253 { "unix", CTLTYPE_NODE }, \
254 { "inet", CTLTYPE_NODE }, \
255 { "implink", CTLTYPE_NODE }, \
256 { "pup", CTLTYPE_NODE }, \
257 { "chaos", CTLTYPE_NODE }, \
258 { "xerox_ns", CTLTYPE_NODE }, \
259 { "iso", CTLTYPE_NODE }, \
260 { "emca", CTLTYPE_NODE }, \
261 { "datakit", CTLTYPE_NODE }, \
262 { "ccitt", CTLTYPE_NODE }, \
263 { "ibm_sna", CTLTYPE_NODE }, \
264 { "decnet", CTLTYPE_NODE }, \
265 { "dec_dli", CTLTYPE_NODE }, \
266 { "lat", CTLTYPE_NODE }, \
267 { "hylink", CTLTYPE_NODE }, \
268 { "appletalk", CTLTYPE_NODE }, \
269 { "route", CTLTYPE_NODE }, \
270 { "link_layer", CTLTYPE_NODE }, \
271 { "xtp", CTLTYPE_NODE }, \
272 { "coip", CTLTYPE_NODE }, \
273 { "cnt", CTLTYPE_NODE }, \
274 { "rtip", CTLTYPE_NODE }, \
275 { "ipx", CTLTYPE_NODE }, \
276 { "sip", CTLTYPE_NODE }, \
277 { "pip", CTLTYPE_NODE }, \
278 { "isdn", CTLTYPE_NODE }, \
279 { "key", CTLTYPE_NODE }, \
280 { "inet6", CTLTYPE_NODE }, \
281 { "natm", CTLTYPE_NODE }, \
282 { "atm", CTLTYPE_NODE }, \
283 { "hdrcomplete", CTLTYPE_NODE }, \
284 { "netgraph", CTLTYPE_NODE }, \
288 * PF_ROUTE - Routing table
290 * Three additional levels are defined:
291 * Fourth: address family, 0 is wildcard
292 * Fifth: type of info, defined below
293 * Sixth: flag(s) to mask with for NET_RT_FLAGS
295 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
296 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
297 #define NET_RT_IFLIST 3 /* survey interface list */
298 #define NET_RT_MAXID 4
300 #define CTL_NET_RT_NAMES { \
302 { "dump", CTLTYPE_STRUCT }, \
303 { "flags", CTLTYPE_STRUCT }, \
304 { "iflist", CTLTYPE_STRUCT }, \
308 * Maximum queue length specifiable by listen.
310 #define SOMAXCONN 128
313 * Message header for recvmsg and sendmsg calls.
314 * Used value-result for recvmsg, value only for sendmsg.
317 void *msg_name; /* optional address */
318 socklen_t msg_namelen; /* size of address */
319 struct iovec *msg_iov; /* scatter/gather array */
320 int msg_iovlen; /* # elements in msg_iov */
321 void *msg_control; /* ancillary data, see below */
322 socklen_t msg_controllen; /* ancillary data buffer len */
323 int msg_flags; /* flags on received message */
326 #define MSG_OOB 0x1 /* process out-of-band data */
327 #define MSG_PEEK 0x2 /* peek at incoming message */
328 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
329 #define MSG_EOR 0x8 /* data completes record */
330 #define MSG_TRUNC 0x10 /* data discarded before delivery */
331 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
332 #define MSG_WAITALL 0x40 /* wait for full request or error */
333 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
334 #define MSG_EOF 0x100 /* data completes connection */
337 * Header for ancillary data objects in msg_control buffer.
338 * Used for additional information with/about a datagram
339 * not expressible by flags. The format is a sequence
340 * of message elements headed by cmsghdr structures.
343 socklen_t cmsg_len; /* data byte count, including hdr */
344 int cmsg_level; /* originating protocol */
345 int cmsg_type; /* protocol-specific type */
346 /* followed by u_char cmsg_data[]; */
350 * While we may have more groups than this, the cmsgcred struct must
351 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
354 #define CMGROUP_MAX 16
357 * Credentials structure, used to verify the identity of a peer
358 * process that has sent us a message. This is allocated by the
359 * peer process but filled in by the kernel. This prevents the
360 * peer from lying about its identity. (Note that cmcred_groups[0]
361 * is the effective GID.)
364 pid_t cmcred_pid; /* PID of sending process */
365 uid_t cmcred_uid; /* real UID of sending process */
366 uid_t cmcred_euid; /* effective UID of sending process */
367 gid_t cmcred_gid; /* real GID of sending process */
368 short cmcred_ngroups; /* number or groups */
369 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
372 /* given pointer to struct cmsghdr, return pointer to data */
373 #define CMSG_DATA(cmsg) ((u_char *)(cmsg) + \
374 _ALIGN(sizeof(struct cmsghdr)))
376 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
377 #define CMSG_NXTHDR(mhdr, cmsg) \
378 (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
379 _ALIGN(sizeof(struct cmsghdr)) > \
380 (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
381 (struct cmsghdr *)NULL : \
382 (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
384 #define CMSG_FIRSTHDR(mhdr) ((struct cmsghdr *)(mhdr)->msg_control)
386 /* RFC 2292 additions */
388 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
389 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
392 #define CMSG_ALIGN(n) _ALIGN(n)
395 /* "Socket"-level control message types: */
396 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
397 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
398 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
401 * howto arguments for shutdown(2), specified by Posix.1g.
403 #define SHUT_RD 0 /* shut down the reading side */
404 #define SHUT_WR 1 /* shut down the writing side */
405 #define SHUT_RDWR 2 /* shut down both sides */
408 * sendfile(2) header/trailer struct
411 struct iovec *headers; /* pointer to an array of header struct iovec's */
412 int hdr_cnt; /* number of header iovec's */
413 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
414 int trl_cnt; /* number of trailer iovec's */
419 #include <sys/cdefs.h>
422 int accept (int, struct sockaddr *, socklen_t *);
423 int bind (int, const struct sockaddr *, socklen_t);
424 int connect (int, const struct sockaddr *, socklen_t);
425 int getpeername (int, struct sockaddr *, socklen_t *);
426 int getsockname (int, struct sockaddr *, socklen_t *);
427 int getsockopt (int, int, int, void *, socklen_t *);
428 int listen (int, int);
429 ssize_t recv (int, void *, size_t, int);
430 ssize_t recvfrom (int, void *, size_t, int, struct sockaddr *, socklen_t *);
431 ssize_t recvmsg (int, struct msghdr *, int);
432 ssize_t send (int, const void *, size_t, int);
433 ssize_t sendto (int, const void *,
434 size_t, int, const struct sockaddr *, socklen_t);
435 ssize_t sendmsg (int, const struct msghdr *, int);
436 int sendfile (int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
437 int setsockopt (int, int, int, const void *, socklen_t);
438 int shutdown (int, int);
439 int socket (int, int, int);
440 int socketpair (int, int, int, int *);
442 void pfctlinput (int, struct sockaddr *);
445 #endif /* !_KERNEL */
447 #endif /* !_SYS_SOCKET_H_ */