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Annotation of XNU/bsd/netat/adsp_NewCID.c, revision 1.1.1.1

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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