text: /*-
   * 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: release/9.1.0/sys/sys/sockstate.h 180948 2008-07-29 07:45:05Z kmacy $
   */
  #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_ */
  