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Annotation of XNU/bsd/netat/adsp_NewCID.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /* 
        !            23:  * dspNewCID.c 
        !            24:  *
        !            25:  * From v01.04 04/20/90 mbs
        !            26:  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
        !            27:  */
        !            28: 
        !            29: #include <sys/errno.h>
        !            30: #include <sys/types.h>
        !            31: #include <sys/param.h>
        !            32: #include <machine/spl.h>
        !            33: #include <sys/systm.h>
        !            34: #include <sys/kernel.h>
        !            35: #include <sys/proc.h>
        !            36: #include <sys/filedesc.h>
        !            37: #include <sys/fcntl.h>
        !            38: #include <sys/mbuf.h>
        !            39: #include <sys/socket.h>
        !            40: 
        !            41: #include <netat/sysglue.h>
        !            42: #include <netat/appletalk.h>
        !            43: #include <netat/at_pcb.h>
        !            44: #include <netat/debug.h>
        !            45: #include <netat/adsp.h>
        !            46: #include <netat/adsp_internal.h>
        !            47: 
        !            48: /*
        !            49:  * dspNewCID
        !            50:  * 
        !            51:  * INPUTS:
        !            52:  *     --> ccbRefNum           refnum of connection end
        !            53:  *
        !            54:  * OUTPUTS:
        !            55:  *     <-- newCID              new connection identifier
        !            56:  *
        !            57:  * ERRORS:
        !            58:  *     errRefNum               bad connection refnum
        !            59:  *     errState                connection is not closed
        !            60:  */
        !            61: int adspNewCID(sp, pb)         /* (DSPPBPtr pb) */
        !            62:     CCBPtr             sp;
        !            63:     struct adspcmd *pb;
        !            64: {
        !            65:     if (sp == 0) {
        !            66:        pb->ioResult = errRefNum;
        !            67:        return EINVAL;
        !            68:     }
        !            69: 
        !            70:     if (sp->state != sClosed) {        /* Can only assign to a closed connection */
        !            71:        pb->ioResult = errState;
        !            72:        return EINVAL;
        !            73:     }
        !            74: 
        !            75:     /*
        !            76:      * Assign a unique connection ID to this ccb
        !            77:      */
        !            78:     sp->locCID = pb->u.newCIDParams.newcid = NextCID();
        !            79: 
        !            80:     pb->ioResult = 0;
        !            81:     adspioc_ack(0, pb->ioc, pb->gref);
        !            82:     return 0;
        !            83: }

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