source: rtems-libbsd/freebsd/sys/sys/sockstate.h @ 66659ff

/*-
 * Copyright (c) 1982, 1986, 1990, 1993
 *      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.
 * 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.
 *
 *      @(#)socketvar.h 8.3 (Berkeley) 2/19/95
 *
 * $FreeBSD$
 */
#ifndef _SYS_SOCKTATE_H_
#define _SYS_SOCKTATE_H_

/*
 * Socket state bits.
 *
 * Historically, this bits were all kept in the so_state field.  For
 * locking reasons, they are now in multiple fields, as they are
 * locked differently.  so_state maintains basic socket state protected
 * by the socket lock.  so_qstate holds information about the socket
 * accept queues.  Each socket buffer also has a state field holding
 * information relevant to that socket buffer (can't send, rcv).  Many
 * fields will be read without locks to improve performance and avoid
 * lock order issues.  However, this approach must be used with caution.
 */
#define SS_NOFDREF              0x0001  /* no file table ref any more */
#define SS_ISCONNECTED          0x0002  /* socket connected to a peer */
#define SS_ISCONNECTING         0x0004  /* in process of connecting to peer */
#define SS_ISDISCONNECTING      0x0008  /* in process of disconnecting */
#define SS_NBIO                 0x0100  /* non-blocking ops */
#define SS_ASYNC                0x0200  /* async i/o notify */
#define SS_ISCONFIRMING         0x0400  /* deciding to accept connection req */
#define SS_ISDISCONNECTED       0x2000  /* socket disconnected from peer */

/*
 * Protocols can mark a socket as SS_PROTOREF to indicate that, following
 * pru_detach, they still want the socket to persist, and will free it
 * themselves when they are done.  Protocols should only ever call sofree()
 * following setting this flag in pru_detach(), and never otherwise, as
 * sofree() bypasses socket reference counting.
 */
#define SS_PROTOREF             0x4000  /* strong protocol reference */

/*
 * Socket state bits now stored in the socket buffer state field.
 */
#define SBS_CANTSENDMORE        0x0010  /* can't send more data to peer */
#define SBS_CANTRCVMORE         0x0020  /* can't receive more data from peer */
#define SBS_RCVATMARK           0x0040  /* at mark on input */

struct socket;

void    soisconnected(struct socket *so);
void    soisconnecting(struct socket *so);
void    soisdisconnected(struct socket *so);
void    soisdisconnecting(struct socket *so);
void    socantrcvmore(struct socket *so);
void    socantrcvmore_locked(struct socket *so);
void    socantsendmore(struct socket *so);
void    socantsendmore_locked(struct socket *so);
#endif /* _SYS_SOCKTATE_H_ */