[unix-history] / sys / sys / socketvar.h

/*-
 * Copyright (c) 1982, 1986, 1990 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	from: @(#)socketvar.h	7.17 (Berkeley) 5/5/91
 *	$Id: socketvar.h,v 1.3 1993/11/07 17:53:03 wollman Exp $
 */

#ifndef _SYS_SOCKETVAR_H_
#define _SYS_SOCKETVAR_H_ 1

/*
 * Kernel structure per socket.
 * Contains send and receive buffer queues,
 * handle on protocol and pointer to protocol
 * private data and error information.
 */
struct socket {
	short	so_type;		/* generic type, see socket.h */
	short	so_options;		/* from socket call, see socket.h */
	short	so_linger;		/* time to linger while closing */
	short	so_state;		/* internal state flags SS_*, below */
	caddr_t	so_pcb;			/* protocol control block */
	struct	protosw *so_proto;	/* protocol handle */
/*
 * Variables for connection queueing.
 * Socket where accepts occur is so_head in all subsidiary sockets.
 * If so_head is 0, socket is not related to an accept.
 * For head socket so_q0 queues partially completed connections,
 * while so_q is a queue of connections ready to be accepted.
 * If a connection is aborted and it has so_head set, then
 * it has to be pulled out of either so_q0 or so_q.
 * We allow connections to queue up based on current queue lengths
 * and limit on number of queued connections for this socket.
 */
	struct	socket *so_head;	/* back pointer to accept socket */
	struct	socket *so_q0;		/* queue of partial connections */
	struct	socket *so_q;		/* queue of incoming connections */
	short	so_q0len;		/* partials on so_q0 */
	short	so_qlen;		/* number of connections on so_q */
	short	so_qlimit;		/* max number queued connections */
	short	so_timeo;		/* connection timeout */
	u_short	so_error;		/* error affecting connection */
	pid_t	so_pgid;		/* pgid for signals */
	u_long	so_oobmark;		/* chars to oob mark */
/*
 * Variables for socket buffering.
 */
	struct	sockbuf {
		u_long	sb_cc;		/* actual chars in buffer */
		u_long	sb_hiwat;	/* max actual char count */
		u_long	sb_mbcnt;	/* chars of mbufs used */
		u_long	sb_mbmax;	/* max chars of mbufs to use */
		long	sb_lowat;	/* low water mark */
		struct	mbuf *sb_mb;	/* the mbuf chain */
		pid_t	sb_sel;		/* process selecting read/write */
		short	sb_flags;	/* flags, see below */
		short	sb_timeo;	/* timeout for read/write */
	} so_rcv, so_snd;
#define	SB_MAX		(64*1024)	/* default for max chars in sockbuf */
#define	SB_LOCK		0x01		/* lock on data queue */
#define	SB_WANT		0x02		/* someone is waiting to lock */
#define	SB_WAIT		0x04		/* someone is waiting for data/space */
#define	SB_SEL		0x08		/* someone is selecting */
#define	SB_ASYNC	0x10		/* ASYNC I/O, need signals */
#define	SB_NOTIFY	(SB_WAIT|SB_SEL|SB_ASYNC)
#define	SB_COLL		0x20		/* collision selecting */
#define	SB_NOINTR	0x40		/* operations not interruptible */

	caddr_t	so_tpcb;		/* Wisc. protocol control block XXX */
};

/*
 * Socket state bits.
 */
#define	SS_NOFDREF		0x001	/* no file table ref any more */
#define	SS_ISCONNECTED		0x002	/* socket connected to a peer */
#define	SS_ISCONNECTING		0x004	/* in process of connecting to peer */
#define	SS_ISDISCONNECTING	0x008	/* in process of disconnecting */
#define	SS_CANTSENDMORE		0x010	/* can't send more data to peer */
#define	SS_CANTRCVMORE		0x020	/* can't receive more data from peer */
#define	SS_RCVATMARK		0x040	/* at mark on input */

#define	SS_PRIV			0x080	/* privileged for broadcast, raw... */
#define	SS_NBIO			0x100	/* non-blocking ops */
#define	SS_ASYNC		0x200	/* async i/o notify */
#define	SS_ISCONFIRMING		0x400	/* deciding to accept connection req */


/*
 * Macros for sockets and socket buffering.
 */

/*
 * How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
 * This is problematical if the fields are unsigned, as the space might
 * still be negative (cc > hiwat or mbcnt > mbmax).  Should detect
 * overflow and return 0.  Should use "lmin" but it doesn't exist now.
 */
#define	sbspace(sb) \
    ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \
	 (int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))

/* do we have to send all at once on a socket? */
#define	sosendallatonce(so) \
    ((so)->so_proto->pr_flags & PR_ATOMIC)

/* can we read something from so? */
#define	soreadable(so) \
    ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \
	((so)->so_state & SS_CANTRCVMORE) || \
	(so)->so_qlen || (so)->so_error)

/* can we write something to so? */
#define	sowriteable(so) \
    (sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
	(((so)->so_state&SS_ISCONNECTED) || \
	  ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0) || \
     ((so)->so_state & SS_CANTSENDMORE) || \
     (so)->so_error)

/* adjust counters in sb reflecting allocation of m */
#define	sballoc(sb, m) { \
	(sb)->sb_cc += (m)->m_len; \
	(sb)->sb_mbcnt += MSIZE; \
	if ((m)->m_flags & M_EXT) \
		(sb)->sb_mbcnt += (m)->m_ext.ext_size; \
}

/* adjust counters in sb reflecting freeing of m */
#define	sbfree(sb, m) { \
	(sb)->sb_cc -= (m)->m_len; \
	(sb)->sb_mbcnt -= MSIZE; \
	if ((m)->m_flags & M_EXT) \
		(sb)->sb_mbcnt -= (m)->m_ext.ext_size; \
}

/*
 * Set lock on sockbuf sb; sleep if lock is already held.
 * Unless SB_NOINTR is set on sockbuf, sleep is interruptible.
 * Returns error without lock if sleep is interrupted.
 */
#define sblock(sb) ((sb)->sb_flags & SB_LOCK ? sb_lock(sb) : \
		((sb)->sb_flags |= SB_LOCK, 0))

/* release lock on sockbuf sb */
#define	sbunlock(sb) { \
	(sb)->sb_flags &= ~SB_LOCK; \
	if ((sb)->sb_flags & SB_WANT) { \
		(sb)->sb_flags &= ~SB_WANT; \
		wakeup((caddr_t)&(sb)->sb_flags); \
	} \
}

#define	sorwakeup(so)	sowakeup((so), &(so)->so_rcv)
#define	sowwakeup(so)	sowakeup((so), &(so)->so_snd)

#ifdef KERNEL
extern u_long	sb_max;
/* to catch callers missing new second argument to sonewconn: */
#define	sonewconn(head, connstatus)	sonewconn1((head), (connstatus))
struct	socket *sonewconn1 __P((struct socket *head, int connstatus));

/* strings for sleep message: */
extern	const char netio[], netcon[], netcls[];

/*
 * File operations on sockets.
 */
int	soo_read __P((struct file *fp, struct uio *uio, struct ucred *cred));
int	soo_write __P((struct file *fp, struct uio *uio, struct ucred *cred));
int	soo_ioctl __P((struct file *fp, int com, caddr_t data, struct proc *p));
int	soo_select __P((struct file *fp, int which, struct proc *p));
int 	soo_close __P((struct file *fp, struct proc *p));

/* From uipc_socket.c: */
struct sockaddr;
struct mbuf;

extern int socreate(int, struct socket **, int, int); /* XXX */
extern int sobind(struct socket *, struct mbuf *);
extern int solisten(struct socket *, int);
extern void sofree(struct socket *);
extern int soclose(struct socket *);
extern int soabort(struct socket *);
extern int soaccept(struct socket *, struct mbuf *);
extern int soconnect(struct socket *, struct mbuf *);
extern int soconnect2(struct socket *, struct socket *);
extern int sodisconnect(struct socket *);
extern int sosend(struct socket *, struct mbuf *, struct uio *, struct mbuf *, struct mbuf *, int); /* XXX */
extern int soreceive(struct socket *, struct mbuf **, struct uio *, struct mbuf **, struct mbuf **, int *); /* XXX */
extern int soshutdown(struct socket *, int);
extern void sorflush(struct socket *);
extern int sosetopt(struct socket *, int, int, struct mbuf *);
extern int sogetopt(struct socket *, int, int, struct mbuf **);
extern void sohasoutofband(struct socket *);

/* From uipc_socket2.c: */
extern void soisconnecting(struct socket *);
extern void soisconnected(struct socket *);
extern void soisdisconnecting(struct socket *);
extern void soisdisconnected(struct socket *);
extern void soqinsque(struct socket *, struct socket *, int);
extern int soqremque(struct socket *, int);
extern void socantsendmore(struct socket *);
extern void socantrcvmore(struct socket *);
extern void sbselqueue(struct sockbuf *, struct proc *);
extern int sbwait(struct sockbuf *);
extern int sb_lock(struct sockbuf *);
extern void sowakeup(struct socket *, struct sockbuf *);
extern int soreserve(struct socket *, u_long, u_long);
extern int sbreserve(struct sockbuf *, u_long);
extern void sbrelease(struct sockbuf *);
extern void sbappend(struct sockbuf *, struct mbuf *);
extern void sbappendrecord(struct sockbuf *, struct mbuf *);
extern void sbinsertoob(struct sockbuf *, struct mbuf *);
extern int sbappendaddr(struct sockbuf *, struct sockaddr *, struct mbuf *, struct mbuf *);
extern int sbappendcontrol(struct sockbuf *, struct mbuf *, struct mbuf *);
extern void sbcompress(struct sockbuf *, struct mbuf *, struct mbuf *);
extern void sbflush(struct sockbuf *);
extern void sbdrop(struct sockbuf *, int);
extern void sbdroprecord(struct sockbuf *);

#endif /* KERNEL */
#endif /* _SYS_SOCKETVAR_H_ */
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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.
	20	*
	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
	31	* SUCH DAMAGE.
	32	*
01e1b05c	33	* from: @(#)socketvar.h 7.17 (Berkeley) 5/5/91
4c45483e	34	* $Id: socketvar.h,v 1.3 1993/11/07 17:53:03 wollman Exp $
15637ed4 RG	35	*/
15637ed4 RG	36
bcdc7290 GW	37	#ifndef _SYS_SOCKETVAR_H_
	38	#define _SYS_SOCKETVAR_H_ 1
	39
15637ed4 RG	40	/*
	41	* Kernel structure per socket.
	42	* Contains send and receive buffer queues,
	43	* handle on protocol and pointer to protocol
	44	* private data and error information.
	45	*/
	46	struct socket {
	47	short so_type; /* generic type, see socket.h */
	48	short so_options; /* from socket call, see socket.h */
	49	short so_linger; /* time to linger while closing */
	50	short so_state; /* internal state flags SS_, below /
	51	caddr_t so_pcb; /* protocol control block */
	52	struct protosw so_proto; / protocol handle */
	53	/*
	54	* Variables for connection queueing.
	55	* Socket where accepts occur is so_head in all subsidiary sockets.
	56	* If so_head is 0, socket is not related to an accept.
	57	* For head socket so_q0 queues partially completed connections,
	58	* while so_q is a queue of connections ready to be accepted.
	59	* If a connection is aborted and it has so_head set, then
	60	* it has to be pulled out of either so_q0 or so_q.
	61	* We allow connections to queue up based on current queue lengths
	62	* and limit on number of queued connections for this socket.
	63	*/
	64	struct socket so_head; / back pointer to accept socket */
	65	struct socket so_q0; / queue of partial connections */
	66	struct socket so_q; / queue of incoming connections */
	67	short so_q0len; /* partials on so_q0 */
	68	short so_qlen; /* number of connections on so_q */
	69	short so_qlimit; /* max number queued connections */
	70	short so_timeo; /* connection timeout */
	71	u_short so_error; /* error affecting connection */
	72	pid_t so_pgid; /* pgid for signals */
	73	u_long so_oobmark; /* chars to oob mark */
	74	/*
	75	* Variables for socket buffering.
	76	*/
	77	struct sockbuf {
	78	u_long sb_cc; /* actual chars in buffer */
	79	u_long sb_hiwat; /* max actual char count */
	80	u_long sb_mbcnt; /* chars of mbufs used */
	81	u_long sb_mbmax; /* max chars of mbufs to use */
	82	long sb_lowat; /* low water mark */
	83	struct mbuf sb_mb; / the mbuf chain */
	84	pid_t sb_sel; /* process selecting read/write */
	85	short sb_flags; /* flags, see below */
	86	short sb_timeo; /* timeout for read/write */
	87	} so_rcv, so_snd;
	88	#define SB_MAX (641024) / default for max chars in sockbuf */
	89	#define SB_LOCK 0x01 /* lock on data queue */
	90	#define SB_WANT 0x02 /* someone is waiting to lock */
	91	#define SB_WAIT 0x04 /* someone is waiting for data/space */
	92	#define SB_SEL 0x08 /* someone is selecting */
	93	#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */
	94	#define SB_NOTIFY (SB_WAIT\|SB_SEL\|SB_ASYNC)
	95	#define SB_COLL 0x20 /* collision selecting */
	96	#define SB_NOINTR 0x40 /* operations not interruptible */
	97
	98	caddr_t so_tpcb; /* Wisc. protocol control block XXX */
	99	};
	100
	101	/*
	102	* Socket state bits.
	103	*/
104	#define SS_NOFDREF 0x001 /* no file table ref any more */
105	#define SS_ISCONNECTED 0x002 /* socket connected to a peer */
106	#define SS_ISCONNECTING 0x004 /* in process of connecting to peer */
107	#define SS_ISDISCONNECTING 0x008 /* in process of disconnecting */
108	#define SS_CANTSENDMORE 0x010 /* can't send more data to peer */
109	#define SS_CANTRCVMORE 0x020 /* can't receive more data from peer */
110	#define SS_RCVATMARK 0x040 /* at mark on input */
111
112	#define SS_PRIV 0x080 /* privileged for broadcast, raw... */
113	#define SS_NBIO 0x100 /* non-blocking ops */
114	#define SS_ASYNC 0x200 /* async i/o notify */
115	#define SS_ISCONFIRMING 0x400 /* deciding to accept connection req */
116
117
118	/*
119	* Macros for sockets and socket buffering.
120	*/
121
122	/*
123	* How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
124	* This is problematical if the fields are unsigned, as the space might
125	* still be negative (cc > hiwat or mbcnt > mbmax). Should detect
126	* overflow and return 0. Should use "lmin" but it doesn't exist now.
127	*/
128	#define sbspace(sb) \
129	((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \
130	(int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))
131
132	/* do we have to send all at once on a socket? */
133	#define sosendallatonce(so) \
134	((so)->so_proto->pr_flags & PR_ATOMIC)
135
136	/* can we read something from so? */
137	#define soreadable(so) \
138	((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat \|\| \
139	((so)->so_state & SS_CANTRCVMORE) \|\| \
140	(so)->so_qlen \|\| (so)->so_error)
141
142	/* can we write something to so? */
143	#define sowriteable(so) \
144	(sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
145	(((so)->so_state&SS_ISCONNECTED) \|\| \
146	((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0) \|\| \
147	((so)->so_state & SS_CANTSENDMORE) \|\| \
148	(so)->so_error)
149
150	/* adjust counters in sb reflecting allocation of m */
151	#define sballoc(sb, m) { \
152	(sb)->sb_cc += (m)->m_len; \
153	(sb)->sb_mbcnt += MSIZE; \
154	if ((m)->m_flags & M_EXT) \
155	(sb)->sb_mbcnt += (m)->m_ext.ext_size; \
156	}
157
158	/* adjust counters in sb reflecting freeing of m */
159	#define sbfree(sb, m) { \
160	(sb)->sb_cc -= (m)->m_len; \
161	(sb)->sb_mbcnt -= MSIZE; \
162	if ((m)->m_flags & M_EXT) \
163	(sb)->sb_mbcnt -= (m)->m_ext.ext_size; \
164	}
165
166	/*
167	* Set lock on sockbuf sb; sleep if lock is already held.
168	* Unless SB_NOINTR is set on sockbuf, sleep is interruptible.
169	* Returns error without lock if sleep is interrupted.
170	*/
171	#define sblock(sb) ((sb)->sb_flags & SB_LOCK ? sb_lock(sb) : \
172	((sb)->sb_flags \|= SB_LOCK, 0))
173
174	/* release lock on sockbuf sb */
175	#define sbunlock(sb) { \
176	(sb)->sb_flags &= ~SB_LOCK; \
177	if ((sb)->sb_flags & SB_WANT) { \
178	(sb)->sb_flags &= ~SB_WANT; \
179	wakeup((caddr_t)&(sb)->sb_flags); \
180	} \
181	}
182
183	#define sorwakeup(so) sowakeup((so), &(so)->so_rcv)
184	#define sowwakeup(so) sowakeup((so), &(so)->so_snd)
185
186	#ifdef KERNEL
bcdc7290	187	extern u_long sb_max;
15637ed4 RG	188	/* to catch callers missing new second argument to sonewconn: */
	189	#define sonewconn(head, connstatus) sonewconn1((head), (connstatus))
	190	struct socket sonewconn1 __P((struct socket head, int connstatus));
	191
	192	/* strings for sleep message: */
4c45483e	193	extern const char netio[], netcon[], netcls[];
15637ed4 RG	194
	195	/*
	196	* File operations on sockets.
	197	*/
	198	int soo_read __P((struct file fp, struct uio uio, struct ucred *cred));
	199	int soo_write __P((struct file fp, struct uio uio, struct ucred *cred));
	200	int soo_ioctl __P((struct file fp, int com, caddr_t data, struct proc p));
	201	int soo_select __P((struct file fp, int which, struct proc p));
	202	int soo_close __P((struct file fp, struct proc p));
4c45483e GW	203
	204	/* From uipc_socket.c: */
	205	struct sockaddr;
	206	struct mbuf;
	207
	208	extern int socreate(int, struct socket *, int, int); / XXX */
	209	extern int sobind(struct socket , struct mbuf );
	210	extern int solisten(struct socket *, int);
	211	extern void sofree(struct socket *);
	212	extern int soclose(struct socket *);
	213	extern int soabort(struct socket *);
	214	extern int soaccept(struct socket , struct mbuf );
	215	extern int soconnect(struct socket , struct mbuf );
	216	extern int soconnect2(struct socket , struct socket );
	217	extern int sodisconnect(struct socket *);
	218	extern int sosend(struct socket , struct mbuf , struct uio , struct mbuf , struct mbuf , int); / XXX */
	219	extern int soreceive(struct socket , struct mbuf , struct uio , struct mbuf , struct mbuf , int ); / XXX */
	220	extern int soshutdown(struct socket *, int);
	221	extern void sorflush(struct socket *);
	222	extern int sosetopt(struct socket , int, int, struct mbuf );
	223	extern int sogetopt(struct socket , int, int, struct mbuf *);
	224	extern void sohasoutofband(struct socket *);
	225
	226	/* From uipc_socket2.c: */
	227	extern void soisconnecting(struct socket *);
	228	extern void soisconnected(struct socket *);
	229	extern void soisdisconnecting(struct socket *);
	230	extern void soisdisconnected(struct socket *);
	231	extern void soqinsque(struct socket , struct socket , int);
	232	extern int soqremque(struct socket *, int);
	233	extern void socantsendmore(struct socket *);
	234	extern void socantrcvmore(struct socket *);
	235	extern void sbselqueue(struct sockbuf , struct proc );
	236	extern int sbwait(struct sockbuf *);
	237	extern int sb_lock(struct sockbuf *);
	238	extern void sowakeup(struct socket , struct sockbuf );
	239	extern int soreserve(struct socket *, u_long, u_long);
	240	extern int sbreserve(struct sockbuf *, u_long);
	241	extern void sbrelease(struct sockbuf *);
	242	extern void sbappend(struct sockbuf , struct mbuf );
	243	extern void sbappendrecord(struct sockbuf , struct mbuf );
	244	extern void sbinsertoob(struct sockbuf , struct mbuf );
	245	extern int sbappendaddr(struct sockbuf , struct sockaddr , struct mbuf , struct mbuf );
	246	extern int sbappendcontrol(struct sockbuf , struct mbuf , struct mbuf *);
	247	extern void sbcompress(struct sockbuf , struct mbuf , struct mbuf *);
	248	extern void sbflush(struct sockbuf *);
	249	extern void sbdrop(struct sockbuf *, int);
	250	extern void sbdroprecord(struct sockbuf *);
	251
	252	#endif /* KERNEL */
bcdc7290	253	#endif /* _SYS_SOCKETVAR_H_ */