The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/sockstate.h

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    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: releng/11.0/sys/sys/sockstate.h 180948 2008-07-29 07:45:05Z kmacy $
   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 
   73 struct socket;
   74 
   75 void    soisconnected(struct socket *so);
   76 void    soisconnecting(struct socket *so);
   77 void    soisdisconnected(struct socket *so);
   78 void    soisdisconnecting(struct socket *so);
   79 void    socantrcvmore(struct socket *so);
   80 void    socantrcvmore_locked(struct socket *so);
   81 void    socantsendmore(struct socket *so);
   82 void    socantsendmore_locked(struct socket *so);
   83 #endif /* _SYS_SOCKTATE_H_ */

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