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File: [cvs.NetBSD.org] / src / sys / sys / socket.h (download)

Revision 1.87, Sun Jun 24 18:00:16 2007 UTC (7 years, 6 months ago) by dsl
Branch: MAIN
CVS Tags: nick-csl-alignment-base, mjf-ufs-trans-base, matt-mips64-base, matt-mips64, hpcarm-cleanup
Branch point for: nick-csl-alignment, matt-armv6, jmcneill-pm
Changes since 1.86: +2 -1 lines

Split sys_getpeername() and sys_getsockname() so they can be called when the
  'name' is wanted in kernel code.
Similarly split sys_accept() and change the split in recvmsg() so that it
  is useful to the compat functions, recvit() is removed and replaced by
  do_sys_recvmsg().
Factor out the code that writes socked names to userspace (from mbuf) to
  avoid replicated code.
Extract the code that writes socket 'control' (CMSG) data out to userspace,
  being more careful about the 'fd' that may exist inside SCM_RIGHTS msgs.
  (they still get lost if some of the latter copyout calls fail).
Since these are new functions, and old LKMs will fail to load.

/*	$NetBSD: socket.h,v 1.87 2007/06/24 18:00:16 dsl Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)socket.h	8.6 (Berkeley) 5/3/95
 */

#ifndef _SYS_SOCKET_H_
#define	_SYS_SOCKET_H_

#include <sys/featuretest.h>

/*
 * Definitions related to sockets: types, address families, options.
 */

/*
 * Data types.
 */
#include <sys/ansi.h>

#ifndef sa_family_t
typedef __sa_family_t	sa_family_t;
#define sa_family_t	__sa_family_t
#endif

#ifndef socklen_t
typedef __socklen_t	socklen_t;
#define socklen_t	__socklen_t
#endif

#include <machine/ansi.h>

#ifdef	_BSD_SIZE_T_
typedef	_BSD_SIZE_T_	size_t;
#undef	_BSD_SIZE_T_
#endif

#ifdef	_BSD_SSIZE_T_
typedef	_BSD_SSIZE_T_	ssize_t;
#undef	_BSD_SSIZE_T_
#endif

#include <sys/uio.h>

/*
 * Socket types.
 */
#define	SOCK_STREAM	1		/* stream socket */
#define	SOCK_DGRAM	2		/* datagram socket */
#define	SOCK_RAW	3		/* raw-protocol interface */
#define	SOCK_RDM	4		/* reliably-delivered message */
#define	SOCK_SEQPACKET	5		/* sequenced packet stream */

/*
 * Option flags per-socket.
 */
#define	SO_DEBUG	0x0001		/* turn on debugging info recording */
#define	SO_ACCEPTCONN	0x0002		/* socket has had listen() */
#define	SO_REUSEADDR	0x0004		/* allow local address reuse */
#define	SO_KEEPALIVE	0x0008		/* keep connections alive */
#define	SO_DONTROUTE	0x0010		/* just use interface addresses */
#define	SO_BROADCAST	0x0020		/* permit sending of broadcast msgs */
#define	SO_USELOOPBACK	0x0040		/* bypass hardware when possible */
#define	SO_LINGER	0x0080		/* linger on close if data present */
#define	SO_OOBINLINE	0x0100		/* leave received OOB data in line */
#define	SO_REUSEPORT	0x0200		/* allow local address & port reuse */
#define	SO_TIMESTAMP	0x0400		/* timestamp received dgram traffic */


/*
 * Additional options, not kept in so_options.
 */
#define SO_SNDBUF	0x1001		/* send buffer size */
#define SO_RCVBUF	0x1002		/* receive buffer size */
#define SO_SNDLOWAT	0x1003		/* send low-water mark */
#define SO_RCVLOWAT	0x1004		/* receive low-water mark */
#define SO_SNDTIMEO	0x1005		/* send timeout */
#define SO_RCVTIMEO	0x1006		/* receive timeout */
#define	SO_ERROR	0x1007		/* get error status and clear */
#define	SO_TYPE		0x1008		/* get socket type */
#define	SO_OVERFLOWED	0x1009		/* datagrams: return packets dropped */

/*
 * Structure used for manipulating linger option.
 */
struct	linger {
	int	l_onoff;		/* option on/off */
	int	l_linger;		/* linger time in seconds */
};

/*
 * Level number for (get/set)sockopt() to apply to socket itself.
 */
#define	SOL_SOCKET	0xffff		/* options for socket level */

/*
 * Address families.
 */
#define	AF_UNSPEC	0		/* unspecified */
#define	AF_LOCAL	1		/* local to host (pipes, portals) */
#define	AF_UNIX		AF_LOCAL	/* backward compatibility */
#define	AF_INET		2		/* internetwork: UDP, TCP, etc. */
#define	AF_IMPLINK	3		/* arpanet imp addresses */
#define	AF_PUP		4		/* pup protocols: e.g. BSP */
#define	AF_CHAOS	5		/* mit CHAOS protocols */
#define	AF_NS		6		/* XEROX NS protocols */
#define	AF_ISO		7		/* ISO protocols */
#define	AF_OSI		AF_ISO
#define	AF_ECMA		8		/* european computer manufacturers */
#define	AF_DATAKIT	9		/* datakit protocols */
#define	AF_CCITT	10		/* CCITT protocols, X.25 etc */
#define	AF_SNA		11		/* IBM SNA */
#define AF_DECnet	12		/* DECnet */
#define AF_DLI		13		/* DEC Direct data link interface */
#define AF_LAT		14		/* LAT */
#define	AF_HYLINK	15		/* NSC Hyperchannel */
#define	AF_APPLETALK	16		/* Apple Talk */
#define	AF_ROUTE	17		/* Internal Routing Protocol */
#define	AF_LINK		18		/* Link layer interface */
#if defined(_NETBSD_SOURCE)
#define	pseudo_AF_XTP	19		/* eXpress Transfer Protocol (no AF) */
#endif
#define	AF_COIP		20		/* connection-oriented IP, aka ST II */
#define	AF_CNT		21		/* Computer Network Technology */
#if defined(_NETBSD_SOURCE)
#define pseudo_AF_RTIP	22		/* Help Identify RTIP packets */
#endif
#define	AF_IPX		23		/* Novell Internet Protocol */
#define	AF_INET6	24		/* IP version 6 */
#if defined(_NETBSD_SOURCE)
#define pseudo_AF_PIP	25		/* Help Identify PIP packets */
#endif
#define AF_ISDN		26		/* Integrated Services Digital Network*/
#define AF_E164		AF_ISDN		/* CCITT E.164 recommendation */
#define AF_NATM		27		/* native ATM access */
#define AF_ARP		28		/* (rev.) addr. res. prot. (RFC 826) */
#if defined(_NETBSD_SOURCE)
#define pseudo_AF_KEY	29		/* Internal key management protocol  */
#define	pseudo_AF_HDRCMPLT 30		/* Used by BPF to not rewrite hdrs
					   in interface output routine */
#endif
#define AF_BLUETOOTH	31		/* Bluetooth: HCI, SCO, L2CAP, RFCOMM */

#define	AF_MAX		32

/*
 * Structure used by kernel to store most
 * addresses.
 */
struct sockaddr {
	__uint8_t	sa_len;		/* total length */
	sa_family_t	sa_family;	/* address family */
	char		sa_data[14];	/* actually longer; address value */
};

#if defined(_KERNEL)
/*
 * Structure used by kernel to pass protocol
 * information in raw sockets.
 */
struct sockproto {
	u_short	sp_family;		/* address family */
	u_short	sp_protocol;		/* protocol */
};
#endif /* _KERNEL */

#if 1
/*
 * RFC 2553: protocol-independent placeholder for socket addresses
 */
#define _SS_MAXSIZE	128
#define _SS_ALIGNSIZE	(sizeof(__int64_t))
#define _SS_PAD1SIZE	(_SS_ALIGNSIZE - 2)
#define _SS_PAD2SIZE	(_SS_MAXSIZE - 2 - \
				_SS_PAD1SIZE - _SS_ALIGNSIZE)

#if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
struct sockaddr_storage {
	__uint8_t	ss_len;		/* address length */
	sa_family_t	ss_family;	/* address family */
	char		__ss_pad1[_SS_PAD1SIZE];
	__int64_t     __ss_align;/* force desired structure storage alignment */
	char		__ss_pad2[_SS_PAD2SIZE];
};
#endif /* _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
#endif /* 1 */

/*
 * Protocol families, same as address families for now.
 */
#define	PF_UNSPEC	AF_UNSPEC
#define	PF_LOCAL	AF_LOCAL
#define	PF_UNIX		PF_LOCAL	/* backward compatibility */
#define	PF_INET		AF_INET
#define	PF_IMPLINK	AF_IMPLINK
#define	PF_PUP		AF_PUP
#define	PF_CHAOS	AF_CHAOS
#define	PF_NS		AF_NS
#define	PF_ISO		AF_ISO
#define	PF_OSI		AF_ISO
#define	PF_ECMA		AF_ECMA
#define	PF_DATAKIT	AF_DATAKIT
#define	PF_CCITT	AF_CCITT
#define	PF_SNA		AF_SNA
#define PF_DECnet	AF_DECnet
#define PF_DLI		AF_DLI
#define PF_LAT		AF_LAT
#define	PF_HYLINK	AF_HYLINK
#define	PF_APPLETALK	AF_APPLETALK
#define	PF_ROUTE	AF_ROUTE
#define	PF_LINK		AF_LINK
#if defined(_NETBSD_SOURCE)
#define	PF_XTP		pseudo_AF_XTP	/* really just proto family, no AF */
#endif
#define	PF_COIP		AF_COIP
#define	PF_CNT		AF_CNT
#define	PF_INET6	AF_INET6
#define	PF_IPX		AF_IPX		/* same format as AF_NS */
#if defined(_NETBSD_SOURCE)
#define PF_RTIP		pseudo_AF_RTIP	/* same format as AF_INET */
#define PF_PIP		pseudo_AF_PIP
#endif
#define PF_ISDN		AF_ISDN		/* same as E164 */
#define PF_E164		AF_E164
#define PF_NATM		AF_NATM
#define PF_ARP		AF_ARP
#if defined(_NETBSD_SOURCE)
#define PF_KEY 		pseudo_AF_KEY	/* like PF_ROUTE, only for key mgmt */
#endif
#define PF_BLUETOOTH	AF_BLUETOOTH

#define	PF_MAX		AF_MAX

#if defined(_NETBSD_SOURCE)

#ifndef	gid_t
typedef	__gid_t		gid_t;		/* group id */
#define	gid_t		__gid_t
#endif

#ifndef	uid_t
typedef	__uid_t		uid_t;		/* user id */
#define	uid_t		__uid_t
#endif

/*
 * Socket credentials.
 */
struct sockcred {
	uid_t	sc_uid;			/* real user id */
	uid_t	sc_euid;		/* effective user id */
	gid_t	sc_gid;			/* real group id */
	gid_t	sc_egid;		/* effective group id */
	int	sc_ngroups;		/* number of supplemental groups */
	gid_t	sc_groups[1];		/* variable length */
};

/*
 * Compute size of a sockcred structure with groups.
 */
#define	SOCKCREDSIZE(ngrps) \
	(sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
#endif /* _NETBSD_SOURCE */


#if defined(_NETBSD_SOURCE)
/*
 * Definitions for network related sysctl, CTL_NET.
 *
 * Second level is protocol family.
 * Third level is protocol number.
 *
 * Further levels are defined by the individual families below.
 */
#define NET_MAXID	AF_MAX

#define CTL_NET_NAMES { \
	{ 0, 0 }, \
	{ "local", CTLTYPE_NODE }, \
	{ "inet", CTLTYPE_NODE }, \
	{ "implink", CTLTYPE_NODE }, \
	{ "pup", CTLTYPE_NODE }, \
	{ "chaos", CTLTYPE_NODE }, \
	{ "xerox_ns", CTLTYPE_NODE }, \
	{ "iso", CTLTYPE_NODE }, \
	{ "emca", CTLTYPE_NODE }, \
	{ "datakit", CTLTYPE_NODE }, \
	{ "ccitt", CTLTYPE_NODE }, \
	{ "ibm_sna", CTLTYPE_NODE }, \
	{ "decnet", CTLTYPE_NODE }, \
	{ "dec_dli", CTLTYPE_NODE }, \
	{ "lat", CTLTYPE_NODE }, \
	{ "hylink", CTLTYPE_NODE }, \
	{ "appletalk", CTLTYPE_NODE }, \
	{ "route", CTLTYPE_NODE }, \
	{ "link_layer", CTLTYPE_NODE }, \
	{ "xtp", CTLTYPE_NODE }, \
	{ "coip", CTLTYPE_NODE }, \
	{ "cnt", CTLTYPE_NODE }, \
	{ "rtip", CTLTYPE_NODE }, \
	{ "ipx", CTLTYPE_NODE }, \
	{ "inet6", CTLTYPE_NODE }, \
	{ "pip", CTLTYPE_NODE }, \
	{ "isdn", CTLTYPE_NODE }, \
	{ "natm", CTLTYPE_NODE }, \
	{ "arp", CTLTYPE_NODE }, \
	{ "key", CTLTYPE_NODE }, \
}

struct kinfo_pcb {
	__uint64_t	ki_pcbaddr;	/* PTR: pcb addr */
	__uint64_t	ki_ppcbaddr;	/* PTR: ppcb addr */
	__uint64_t	ki_sockaddr;	/* PTR: socket addr */

	__uint32_t	ki_family;	/* INT: protocol family */
	__uint32_t	ki_type;	/* INT: socket type */
	__uint32_t	ki_protocol;	/* INT: protocol */
	__uint32_t	ki_pflags;	/* INT: generic protocol flags */

	__uint32_t	ki_sostate;	/* INT: socket state */
	__uint32_t	ki_prstate;	/* INT: protocol state */
	__int32_t	ki_tstate;	/* INT: tcp state */
	__uint32_t	ki_tflags;	/* INT: tcp flags */

	__uint64_t	ki_rcvq;	/* U_LONG: receive queue len */
	__uint64_t	ki_sndq;	/* U_LONG: send queue len */

	union {
		struct sockaddr	_kis_src; /* STRUCT: local address */
		char _kis_pad[256 + 8];		/* pad to max addr length */
	} ki_s;
	union {
		struct sockaddr	_kid_dst; /* STRUCT: remote address */
		char _kid_pad[256 + 8];		/* pad to max addr length */
	} ki_d;

	__uint64_t	ki_inode;	/* INO_T: fake inode number */
	__uint64_t	ki_vnode;	/* PTR: if associated with file */
	__uint64_t	ki_conn;	/* PTR: control block of peer */
	__uint64_t	ki_refs;	/* PTR: referencing socket */
	__uint64_t	ki_nextref;	/* PTR: link in refs list */
};

#define ki_src ki_s._kis_src
#define ki_dst ki_d._kid_dst

#define PCB_SLOP		20
#define PCB_ALL			0

#endif /* _NETBSD_SOURCE */

#if defined(_NETBSD_SOURCE)
/*
 * PF_ROUTE - Routing table
 *
 * Three additional levels are defined:
 *	Fourth: address family, 0 is wildcard
 *	Fifth: type of info, defined below
 *	Sixth: flag(s) to mask with for NET_RT_FLAGS
 */
#define NET_RT_DUMP	1		/* dump; may limit to a.f. */
#define NET_RT_FLAGS	2		/* by flags, e.g. RESOLVING */
#define NET_RT_OIFLIST	3		/* old NET_RT_IFLIST (pre 1.5) */
#define NET_RT_IFLIST	4		/* survey interface list */
#define	NET_RT_MAXID	5

#define CTL_NET_RT_NAMES { \
	{ 0, 0 }, \
	{ "dump", CTLTYPE_STRUCT }, \
	{ "flags", CTLTYPE_STRUCT }, \
	{ 0, 0 }, \
	{ "iflist", CTLTYPE_STRUCT }, \
}
#endif /* _NETBSD_SOURCE */

/*
 * Maximum queue length specifiable by listen(2).
 */
#ifndef SOMAXCONN
#define	SOMAXCONN	128
#endif

/*
 * Message header for recvmsg and sendmsg calls.
 * Used value-result for recvmsg, value only for sendmsg.
 */
struct msghdr {
	void		*msg_name;	/* optional address */
	socklen_t	msg_namelen;	/* size of address */
	struct iovec	*msg_iov;	/* scatter/gather array */
	int		msg_iovlen;	/* # elements in msg_iov */
	void		*msg_control;	/* ancillary data, see below */
	socklen_t	msg_controllen;	/* ancillary data buffer len */
	int		msg_flags;	/* flags on received message */
};

#define	MSG_OOB		0x0001		/* process out-of-band data */
#define	MSG_PEEK	0x0002		/* peek at incoming message */
#define	MSG_DONTROUTE	0x0004		/* send without using routing tables */
#define	MSG_EOR		0x0008		/* data completes record */
#define	MSG_TRUNC	0x0010		/* data discarded before delivery */
#define	MSG_CTRUNC	0x0020		/* control data lost before delivery */
#define	MSG_WAITALL	0x0040		/* wait for full request or error */
#define	MSG_DONTWAIT	0x0080		/* this message should be nonblocking */
#define	MSG_BCAST	0x0100		/* this message was rcvd using link-level brdcst */
#define	MSG_MCAST	0x0200		/* this message was rcvd using link-level mcast */
#define	MSG_NOSIGNAL	0x0400		/* do not generate SIGPIPE on EOF */

/* Extra flags used internally only */
#define	MSG_USERFLAGS	0x0ffffff
#define MSG_NAMEMBUF	0x1000000	/* msg_name is an mbuf */
#define MSG_CONTROLMBUF	0x2000000	/* msg_control is an mbuf */
#define MSG_IOVUSRSPACE	0x4000000	/* msg_iov is in user space */
#define MSG_LENUSRSPACE	0x8000000	/* address length is in user space */

/*
 * Header for ancillary data objects in msg_control buffer.
 * Used for additional information with/about a datagram
 * not expressible by flags.  The format is a sequence
 * of message elements headed by cmsghdr structures.
 */
struct cmsghdr {
	socklen_t	cmsg_len;	/* data byte count, including hdr */
	int		cmsg_level;	/* originating protocol */
	int		cmsg_type;	/* protocol-specific type */
/* followed by	u_char  cmsg_data[]; */
};

/* given pointer to struct cmsghdr, return pointer to data */
#define	CMSG_DATA(cmsg) \
	((u_char *)(void *)(cmsg) + __CMSG_ALIGN(sizeof(struct cmsghdr)))
#define	CCMSG_DATA(cmsg) \
	((const u_char *)(const void *)(cmsg) + \
	__CMSG_ALIGN(sizeof(struct cmsghdr)))

/*
 * Alignment requirement for CMSG struct manipulation.
 * This basically behaves the same as ALIGN() ARCH/include/param.h.
 * We declare it separately for two reasons:
 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
 * idea of ALIGNBYTES at runtime.
 * without (2), we can't guarantee binary compatibility in case of future
 * changes in ALIGNBYTES.
 */
#define __CMSG_ALIGN(n)	(((n) + __cmsg_alignbytes()) & ~__cmsg_alignbytes())
#ifdef _KERNEL
#define CMSG_ALIGN(n)	__CMSG_ALIGN(n)
#endif

/* given pointer to struct cmsghdr, return pointer to next cmsghdr */
#define	CMSG_NXTHDR(mhdr, cmsg)	\
	(((char *)(cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len) + \
			    __CMSG_ALIGN(sizeof(struct cmsghdr)) > \
	    (((char *)(mhdr)->msg_control) + (mhdr)->msg_controllen)) ? \
	    (struct cmsghdr *)0 : \
	    (struct cmsghdr *)((char *)(cmsg) + \
	        __CMSG_ALIGN((cmsg)->cmsg_len)))

/*
 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
 * an empty list for some reasons.
 */
#define	CMSG_FIRSTHDR(mhdr) \
	((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
	 (struct cmsghdr *)(mhdr)->msg_control : \
	 (struct cmsghdr *)0)

#define CMSG_SPACE(l)	(__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(l))
#define CMSG_LEN(l)	(__CMSG_ALIGN(sizeof(struct cmsghdr)) + (l))

/* "Socket"-level control message types: */
#define	SCM_RIGHTS	0x01		/* access rights (array of int) */
#if defined(_NETBSD_SOURCE)
#define	SCM_TIMESTAMP	0x02		/* timestamp (struct timeval) */
#define	SCM_CREDS	0x04		/* credentials (struct sockcred) */
#endif

/*
 * Types of socket shutdown(2).
 */
#define	SHUT_RD		0		/* Disallow further receives. */
#define	SHUT_WR		1		/* Disallow further sends. */
#define	SHUT_RDWR	2		/* Disallow further sends/receives. */

#include <sys/cdefs.h>

__BEGIN_DECLS
int	__cmsg_alignbytes(void);
__END_DECLS

#ifdef	_KERNEL
__BEGIN_DECLS
struct sockaddr *sockaddr_copy(struct sockaddr *, const struct sockaddr *);
struct sockaddr *sockaddr_alloc(sa_family_t, int);
int sockaddr_cmp(const struct sockaddr *, const struct sockaddr *);
struct sockaddr *sockaddr_dup(const struct sockaddr *, int);
void sockaddr_free(struct sockaddr *);
__END_DECLS
#endif /* _KERNEL */

#ifndef	_KERNEL

__BEGIN_DECLS
int	accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
int	bind(int, const struct sockaddr *, socklen_t);
int	connect(int, const struct sockaddr *, socklen_t);
int	getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
int	getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
int	getsockopt(int, int, int, void *__restrict, socklen_t * __restrict);
int	listen(int, int);
ssize_t	recv(int, void *, size_t, int);
ssize_t	recvfrom(int, void *__restrict, size_t, int,
	    struct sockaddr * __restrict, socklen_t * __restrict);
ssize_t	recvmsg(int, struct msghdr *, int);
ssize_t	send(int, const void *, size_t, int);
ssize_t	sendto(int, const void *,
	    size_t, int, const struct sockaddr *, socklen_t);
ssize_t	sendmsg(int, const struct msghdr *, int);
int	setsockopt(int, int, int, const void *, socklen_t);
int	shutdown(int, int);
int	sockatmark(int);
int	socket(int, int, int)
#if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)
__RENAME(__socket30)
#endif
			     ;
int	socketpair(int, int, int, int *);
__END_DECLS
#endif /* !_KERNEL */

#endif /* !_SYS_SOCKET_H_ */