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.
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13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)socket.h 8.4 (Berkeley) 2/21/94
33 #ifndef _SYS_SOCKET_H_
34 #define _SYS_SOCKET_H_
36 #include <sys/cdefs.h>
37 #include <sys/_types.h>
38 #include <sys/_iovec.h>
39 #include <machine/_align.h>
42 * Definitions related to sockets: types, address families, options.
49 #ifndef _GID_T_DECLARED
50 typedef __gid_t gid_t;
51 #define _GID_T_DECLARED
54 #ifndef _OFF_T_DECLARED
55 typedef __off_t off_t;
56 #define _OFF_T_DECLARED
59 #ifndef _PID_T_DECLARED
60 typedef __pid_t pid_t;
61 #define _PID_T_DECLARED
65 #ifndef _SA_FAMILY_T_DECLARED
66 typedef __sa_family_t sa_family_t;
67 #define _SA_FAMILY_T_DECLARED
70 #ifndef _SOCKLEN_T_DECLARED
71 typedef __socklen_t socklen_t;
72 #define _SOCKLEN_T_DECLARED
75 #ifndef _SSIZE_T_DECLARED
76 typedef __ssize_t ssize_t;
77 #define _SSIZE_T_DECLARED
81 #ifndef _UID_T_DECLARED
82 typedef __uid_t uid_t;
83 #define _UID_T_DECLARED
90 #define SOCK_STREAM 1 /* stream socket */
91 #define SOCK_DGRAM 2 /* datagram socket */
92 #define SOCK_RAW 3 /* raw-protocol interface */
94 #define SOCK_RDM 4 /* reliably-delivered message */
96 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
100 * Creation flags, OR'ed into socket() and socketpair() type argument.
102 #define SOCK_CLOEXEC 0x10000000
103 #define SOCK_NONBLOCK 0x20000000
107 * Option flags per-socket.
109 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
110 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
111 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
112 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
113 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
114 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
116 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
118 #define SO_LINGER 0x0080 /* linger on close if data present */
119 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
121 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
122 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
123 #define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
124 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
125 #define SO_BINTIME 0x2000 /* timestamp received dgram traffic */
127 #define SO_NO_OFFLOAD 0x4000 /* socket cannot be offloaded */
128 #define SO_NO_DDP 0x8000 /* disable direct data placement */
131 * Additional options, not kept in so_options.
133 #define SO_SNDBUF 0x1001 /* send buffer size */
134 #define SO_RCVBUF 0x1002 /* receive buffer size */
135 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
136 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
137 #define SO_SNDTIMEO 0x1005 /* send timeout */
138 #define SO_RCVTIMEO 0x1006 /* receive timeout */
139 #define SO_ERROR 0x1007 /* get error status and clear */
140 #define SO_TYPE 0x1008 /* get socket type */
142 #define SO_LABEL 0x1009 /* socket's MAC label */
143 #define SO_PEERLABEL 0x1010 /* socket's peer's MAC label */
144 #define SO_LISTENQLIMIT 0x1011 /* socket's backlog limit */
145 #define SO_LISTENQLEN 0x1012 /* socket's complete queue length */
146 #define SO_LISTENINCQLEN 0x1013 /* socket's incomplete queue length */
147 #define SO_SETFIB 0x1014 /* use this FIB to route */
148 #define SO_USER_COOKIE 0x1015 /* user cookie (dummynet etc.) */
149 #define SO_PROTOCOL 0x1016 /* get socket protocol (Linux name) */
150 #define SO_PROTOTYPE SO_PROTOCOL /* alias for SO_PROTOCOL (SunOS name) */
154 * Space reserved for new socket options added by third-party vendors.
155 * This range applies to all socket option levels. New socket options
156 * in FreeBSD should always use an option value less than SO_VENDOR.
159 #define SO_VENDOR 0x80000000
163 * Structure used for manipulating linger option.
166 int l_onoff; /* option on/off */
167 int l_linger; /* linger time */
171 struct accept_filter_arg {
178 * Level number for (get/set)sockopt() to apply to socket itself.
180 #define SOL_SOCKET 0xffff /* options for socket level */
185 #define AF_UNSPEC 0 /* unspecified */
187 #define AF_LOCAL AF_UNIX /* local to host (pipes, portals) */
189 #define AF_UNIX 1 /* standardized name for AF_LOCAL */
190 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
192 #define AF_IMPLINK 3 /* arpanet imp addresses */
193 #define AF_PUP 4 /* pup protocols: e.g. BSP */
194 #define AF_CHAOS 5 /* mit CHAOS protocols */
195 #define AF_NETBIOS 6 /* SMB protocols */
196 #define AF_ISO 7 /* ISO protocols */
197 #define AF_OSI AF_ISO
198 #define AF_ECMA 8 /* European computer manufacturers */
199 #define AF_DATAKIT 9 /* datakit protocols */
200 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
201 #define AF_SNA 11 /* IBM SNA */
202 #define AF_DECnet 12 /* DECnet */
203 #define AF_DLI 13 /* DEC Direct data link interface */
204 #define AF_LAT 14 /* LAT */
205 #define AF_HYLINK 15 /* NSC Hyperchannel */
206 #define AF_APPLETALK 16 /* Apple Talk */
207 #define AF_ROUTE 17 /* Internal Routing Protocol */
208 #define AF_LINK 18 /* Link layer interface */
209 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
210 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
211 #define AF_CNT 21 /* Computer Network Technology */
212 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
213 #define AF_IPX 23 /* Novell Internet Protocol */
214 #define AF_SIP 24 /* Simple Internet Protocol */
215 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
216 #define AF_ISDN 26 /* Integrated Services Digital Network*/
217 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
218 #define pseudo_AF_KEY 27 /* Internal key-management function */
220 #define AF_INET6 28 /* IPv6 */
222 #define AF_NATM 29 /* native ATM access */
223 #define AF_ATM 30 /* ATM */
224 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
225 * in interface output routine
227 #define AF_NETGRAPH 32 /* Netgraph sockets */
228 #define AF_SLOW 33 /* 802.3ad slow protocol */
229 #define AF_SCLUSTER 34 /* Sitara cluster protocol */
231 #define AF_BLUETOOTH 36 /* Bluetooth sockets */
232 #define AF_IEEE80211 37 /* IEEE 802.11 protocol */
233 #define AF_INET_SDP 40 /* OFED Socket Direct Protocol ipv4 */
234 #define AF_INET6_SDP 42 /* OFED Socket Direct Protocol ipv6 */
237 * When allocating a new AF_ constant, please only allocate
238 * even numbered constants for FreeBSD until 134 as odd numbered AF_
239 * constants 39-133 are now reserved for vendors.
241 #define AF_VENDOR00 39
242 #define AF_VENDOR01 41
243 #define AF_VENDOR02 43
244 #define AF_VENDOR03 45
245 #define AF_VENDOR04 47
246 #define AF_VENDOR05 49
247 #define AF_VENDOR06 51
248 #define AF_VENDOR07 53
249 #define AF_VENDOR08 55
250 #define AF_VENDOR09 57
251 #define AF_VENDOR10 59
252 #define AF_VENDOR11 61
253 #define AF_VENDOR12 63
254 #define AF_VENDOR13 65
255 #define AF_VENDOR14 67
256 #define AF_VENDOR15 69
257 #define AF_VENDOR16 71
258 #define AF_VENDOR17 73
259 #define AF_VENDOR18 75
260 #define AF_VENDOR19 77
261 #define AF_VENDOR20 79
262 #define AF_VENDOR21 81
263 #define AF_VENDOR22 83
264 #define AF_VENDOR23 85
265 #define AF_VENDOR24 87
266 #define AF_VENDOR25 89
267 #define AF_VENDOR26 91
268 #define AF_VENDOR27 93
269 #define AF_VENDOR28 95
270 #define AF_VENDOR29 97
271 #define AF_VENDOR30 99
272 #define AF_VENDOR31 101
273 #define AF_VENDOR32 103
274 #define AF_VENDOR33 105
275 #define AF_VENDOR34 107
276 #define AF_VENDOR35 109
277 #define AF_VENDOR36 111
278 #define AF_VENDOR37 113
279 #define AF_VENDOR38 115
280 #define AF_VENDOR39 117
281 #define AF_VENDOR40 119
282 #define AF_VENDOR41 121
283 #define AF_VENDOR42 123
284 #define AF_VENDOR43 125
285 #define AF_VENDOR44 127
286 #define AF_VENDOR45 129
287 #define AF_VENDOR46 131
288 #define AF_VENDOR47 133
292 * Structure used by kernel to store most
296 unsigned char sa_len; /* total length */
297 sa_family_t sa_family; /* address family */
298 char sa_data[14]; /* actually longer; address value */
301 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
304 * Structure used by kernel to pass protocol
305 * information in raw sockets.
308 unsigned short sp_family; /* address family */
309 unsigned short sp_protocol; /* protocol */
313 #include <sys/_sockaddr_storage.h>
317 * Protocol families, same as address families for now.
319 #define PF_UNSPEC AF_UNSPEC
320 #define PF_LOCAL AF_LOCAL
321 #define PF_UNIX PF_LOCAL /* backward compatibility */
322 #define PF_INET AF_INET
323 #define PF_IMPLINK AF_IMPLINK
324 #define PF_PUP AF_PUP
325 #define PF_CHAOS AF_CHAOS
326 #define PF_NETBIOS AF_NETBIOS
327 #define PF_ISO AF_ISO
328 #define PF_OSI AF_ISO
329 #define PF_ECMA AF_ECMA
330 #define PF_DATAKIT AF_DATAKIT
331 #define PF_CCITT AF_CCITT
332 #define PF_SNA AF_SNA
333 #define PF_DECnet AF_DECnet
334 #define PF_DLI AF_DLI
335 #define PF_LAT AF_LAT
336 #define PF_HYLINK AF_HYLINK
337 #define PF_APPLETALK AF_APPLETALK
338 #define PF_ROUTE AF_ROUTE
339 #define PF_LINK AF_LINK
340 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
341 #define PF_COIP AF_COIP
342 #define PF_CNT AF_CNT
343 #define PF_SIP AF_SIP
344 #define PF_IPX AF_IPX
345 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
346 #define PF_PIP pseudo_AF_PIP
347 #define PF_ISDN AF_ISDN
348 #define PF_KEY pseudo_AF_KEY
349 #define PF_INET6 AF_INET6
350 #define PF_NATM AF_NATM
351 #define PF_ATM AF_ATM
352 #define PF_NETGRAPH AF_NETGRAPH
353 #define PF_SLOW AF_SLOW
354 #define PF_SCLUSTER AF_SCLUSTER
355 #define PF_ARP AF_ARP
356 #define PF_BLUETOOTH AF_BLUETOOTH
357 #define PF_IEEE80211 AF_IEEE80211
358 #define PF_INET_SDP AF_INET_SDP
359 #define PF_INET6_SDP AF_INET6_SDP
361 #define PF_MAX AF_MAX
364 * Definitions for network related sysctl, CTL_NET.
366 * Second level is protocol family.
367 * Third level is protocol number.
369 * Further levels are defined by the individual families below.
371 #define NET_MAXID AF_MAX
374 * PF_ROUTE - Routing table
376 * Three additional levels are defined:
377 * Fourth: address family, 0 is wildcard
378 * Fifth: type of info, defined below
379 * Sixth: flag(s) to mask with for NET_RT_FLAGS
381 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
382 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
383 #define NET_RT_IFLIST 3 /* survey interface list */
384 #define NET_RT_IFMALIST 4 /* return multicast address list */
385 #define NET_RT_IFLISTL 5 /* Survey interface list, using 'l'en
386 * versions of msghdr structs. */
387 #define NET_RT_MAXID 6
389 #endif /* __BSD_VISIBLE */
392 * Maximum queue length specifiable by listen.
394 #define SOMAXCONN 128
397 * Message header for recvmsg and sendmsg calls.
398 * Used value-result for recvmsg, value only for sendmsg.
401 void *msg_name; /* optional address */
402 socklen_t msg_namelen; /* size of address */
403 struct iovec *msg_iov; /* scatter/gather array */
404 int msg_iovlen; /* # elements in msg_iov */
405 void *msg_control; /* ancillary data, see below */
406 socklen_t msg_controllen; /* ancillary data buffer len */
407 int msg_flags; /* flags on received message */
410 #define MSG_OOB 0x1 /* process out-of-band data */
411 #define MSG_PEEK 0x2 /* peek at incoming message */
412 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
413 #define MSG_EOR 0x8 /* data completes record */
414 #define MSG_TRUNC 0x10 /* data discarded before delivery */
415 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
416 #define MSG_WAITALL 0x40 /* wait for full request or error */
417 #if __POSIX_VISIBLE >= 200809
418 #define MSG_NOSIGNAL 0x20000 /* do not generate SIGPIPE on EOF */
421 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
422 #define MSG_EOF 0x100 /* data completes connection */
423 #define MSG_NOTIFICATION 0x2000 /* SCTP notification */
424 #define MSG_NBIO 0x4000 /* FIONBIO mode, used by fifofs */
425 #define MSG_COMPAT 0x8000 /* used in sendit() */
426 #define MSG_CMSG_CLOEXEC 0x40000 /* make received fds close-on-exec */
429 #define MSG_SOCALLBCK 0x10000 /* for use by socket callbacks - soreceive (TCP) */
433 * Header for ancillary data objects in msg_control buffer.
434 * Used for additional information with/about a datagram
435 * not expressible by flags. The format is a sequence
436 * of message elements headed by cmsghdr structures.
439 socklen_t cmsg_len; /* data byte count, including hdr */
440 int cmsg_level; /* originating protocol */
441 int cmsg_type; /* protocol-specific type */
442 /* followed by u_char cmsg_data[]; */
447 * While we may have more groups than this, the cmsgcred struct must
448 * be able to fit in an mbuf and we have historically supported a
449 * maximum of 16 groups.
451 #define CMGROUP_MAX 16
454 * Credentials structure, used to verify the identity of a peer
455 * process that has sent us a message. This is allocated by the
456 * peer process but filled in by the kernel. This prevents the
457 * peer from lying about its identity. (Note that cmcred_groups[0]
458 * is the effective GID.)
461 pid_t cmcred_pid; /* PID of sending process */
462 uid_t cmcred_uid; /* real UID of sending process */
463 uid_t cmcred_euid; /* effective UID of sending process */
464 gid_t cmcred_gid; /* real GID of sending process */
465 short cmcred_ngroups; /* number or groups */
466 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
470 * Socket credentials.
473 uid_t sc_uid; /* real user id */
474 uid_t sc_euid; /* effective user id */
475 gid_t sc_gid; /* real group id */
476 gid_t sc_egid; /* effective group id */
477 int sc_ngroups; /* number of supplemental groups */
478 gid_t sc_groups[1]; /* variable length */
482 * Compute size of a sockcred structure with groups.
484 #define SOCKCREDSIZE(ngrps) \
485 (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
487 #endif /* __BSD_VISIBLE */
489 /* given pointer to struct cmsghdr, return pointer to data */
490 #define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \
491 _ALIGN(sizeof(struct cmsghdr)))
493 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
494 #define CMSG_NXTHDR(mhdr, cmsg) \
495 ((char *)(cmsg) == NULL ? CMSG_FIRSTHDR(mhdr) : \
496 ((char *)(cmsg) + _ALIGN(((struct cmsghdr *)(cmsg))->cmsg_len) + \
497 _ALIGN(sizeof(struct cmsghdr)) > \
498 (char *)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
499 (struct cmsghdr *)0 : \
500 (struct cmsghdr *)(void *)((char *)(cmsg) + \
501 _ALIGN(((struct cmsghdr *)(cmsg))->cmsg_len)))
504 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
505 * an empty list for some reasons.
507 #define CMSG_FIRSTHDR(mhdr) \
508 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
509 (struct cmsghdr *)(mhdr)->msg_control : \
510 (struct cmsghdr *)NULL)
513 /* RFC 2292 additions */
514 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
515 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
519 #define CMSG_ALIGN(n) _ALIGN(n)
522 /* "Socket"-level control message types: */
523 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
525 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
526 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
527 #define SCM_BINTIME 0x04 /* timestamp (struct bintime) */
532 * 4.3 compat sockaddr, move to compat file later
535 unsigned short sa_family; /* address family */
536 char sa_data[14]; /* up to 14 bytes of direct address */
540 * 4.3-compat message header (move to compat file later).
543 char *msg_name; /* optional address */
544 int msg_namelen; /* size of address */
545 struct iovec *msg_iov; /* scatter/gather array */
546 int msg_iovlen; /* # elements in msg_iov */
547 char *msg_accrights; /* access rights sent/received */
548 int msg_accrightslen;
553 * howto arguments for shutdown(2), specified by Posix.1g.
555 #define SHUT_RD 0 /* shut down the reading side */
556 #define SHUT_WR 1 /* shut down the writing side */
557 #define SHUT_RDWR 2 /* shut down both sides */
561 /* we cheat and use the SHUT_XX defines for these */
562 #define PRU_FLUSH_RD SHUT_RD
563 #define PRU_FLUSH_WR SHUT_WR
564 #define PRU_FLUSH_RDWR SHUT_RDWR
570 * sendfile(2) header/trailer struct
573 struct iovec *headers; /* pointer to an array of header struct iovec's */
574 int hdr_cnt; /* number of header iovec's */
575 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
576 int trl_cnt; /* number of trailer iovec's */
580 * Sendfile-specific flag(s)
582 #define SF_NODISKIO 0x00000001
583 #define SF_MNOWAIT 0x00000002
584 #define SF_SYNC 0x00000004
587 #define SFK_COMPAT 0x00000001
589 #endif /* __BSD_VISIBLE */
593 #include <sys/cdefs.h>
596 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
597 int bind(int, const struct sockaddr *, socklen_t);
598 int connect(int, const struct sockaddr *, socklen_t);
600 int accept4(int, struct sockaddr * __restrict, socklen_t * __restrict, int);
601 int bindat(int, int, const struct sockaddr *, socklen_t);
602 int connectat(int, int, const struct sockaddr *, socklen_t);
604 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
605 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
606 int getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
607 int listen(int, int);
608 ssize_t recv(int, void *, size_t, int);
609 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict);
610 ssize_t recvmsg(int, struct msghdr *, int);
611 ssize_t send(int, const void *, size_t, int);
612 ssize_t sendto(int, const void *,
613 size_t, int, const struct sockaddr *, socklen_t);
614 ssize_t sendmsg(int, const struct msghdr *, int);
616 int sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
619 int setsockopt(int, int, int, const void *, socklen_t);
620 int shutdown(int, int);
622 int socket(int, int, int);
623 int socketpair(int, int, int, int *);
626 #endif /* !_KERNEL */
631 struct tcpcb *so_sototcpcb(struct socket *so);
632 struct inpcb *so_sotoinpcb(struct socket *so);
633 struct sockbuf *so_sockbuf_snd(struct socket *);
634 struct sockbuf *so_sockbuf_rcv(struct socket *);
636 int so_state_get(const struct socket *);
637 void so_state_set(struct socket *, int);
639 int so_options_get(const struct socket *);
640 void so_options_set(struct socket *, int);
642 int so_error_get(const struct socket *);
643 void so_error_set(struct socket *, int);
645 int so_linger_get(const struct socket *);
646 void so_linger_set(struct socket *, int);
648 struct protosw *so_protosw_get(const struct socket *);
649 void so_protosw_set(struct socket *, struct protosw *);
651 void so_sorwakeup_locked(struct socket *so);
652 void so_sowwakeup_locked(struct socket *so);
654 void so_sorwakeup(struct socket *so);
655 void so_sowwakeup(struct socket *so);
657 void so_lock(struct socket *so);
658 void so_unlock(struct socket *so);
660 void so_listeners_apply_all(struct socket *so, void (*func)(struct socket *, void *), void *arg);
665 #endif /* !_SYS_SOCKET_H_ */