1/*-
2 * Copyright (c) 1982, 1986, 1990, 1993
3 *	The Regents of the University of California.  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 * 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
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)socketvar.h	8.3 (Berkeley) 2/19/95
30 *
31 * $FreeBSD$
32 */
33#ifndef _SYS_SOCKTATE_H_
34#define _SYS_SOCKTATE_H_
35
36/*
37 * Socket state bits.
38 *
39 * Historically, this bits were all kept in the so_state field.  For
40 * locking reasons, they are now in multiple fields, as they are
41 * locked differently.  so_state maintains basic socket state protected
42 * by the socket lock.  so_qstate holds information about the socket
43 * accept queues.  Each socket buffer also has a state field holding
44 * information relevant to that socket buffer (can't send, rcv).  Many
45 * fields will be read without locks to improve performance and avoid
46 * lock order issues.  However, this approach must be used with caution.
47 */
48#define	SS_NOFDREF		0x0001	/* no file table ref any more */
49#define	SS_ISCONNECTED		0x0002	/* socket connected to a peer */
50#define	SS_ISCONNECTING		0x0004	/* in process of connecting to peer */
51#define	SS_ISDISCONNECTING	0x0008	/* in process of disconnecting */
52#define	SS_NBIO			0x0100	/* non-blocking ops */
53#define	SS_ASYNC		0x0200	/* async i/o notify */
54#define	SS_ISCONFIRMING		0x0400	/* deciding to accept connection req */
55#define	SS_ISDISCONNECTED	0x2000	/* socket disconnected from peer */
56
57/*
58 * Protocols can mark a socket as SS_PROTOREF to indicate that, following
59 * pru_detach, they still want the socket to persist, and will free it
60 * themselves when they are done.  Protocols should only ever call sofree()
61 * following setting this flag in pru_detach(), and never otherwise, as
62 * sofree() bypasses socket reference counting.
63 */
64#define	SS_PROTOREF		0x4000	/* strong protocol reference */
65
66/*
67 * Socket state bits now stored in the socket buffer state field.
68 */
69#define	SBS_CANTSENDMORE	0x0010	/* can't send more data to peer */
70#define	SBS_CANTRCVMORE		0x0020	/* can't receive more data from peer */
71#define	SBS_RCVATMARK		0x0040	/* at mark on input */
72
73struct socket;
74
75void	soisconnected(struct socket *so);
76void	soisconnecting(struct socket *so);
77void	soisdisconnected(struct socket *so);
78void	soisdisconnecting(struct socket *so);
79void	socantrcvmore(struct socket *so);
80void	socantrcvmore_locked(struct socket *so);
81void	socantsendmore(struct socket *so);
82void	socantsendmore_locked(struct socket *so);
83#endif /* _SYS_SOCKTATE_H_ */
84