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Annotation of XNU/bsd/netat/adsp_Init.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:  *     Copyright (c) 1990, 1996-1998 Apple Computer, Inc.
        !            24:  *     All Rights Reserved.
        !            25:  */
        !            26: 
        !            27: /* dspInit.c 
        !            28:  *
        !            29:  * From Mike Shoemaker v01.20 06/29/90 mbs
        !            30:  *    Modified for MP, 1996 by Tuyen Nguyen
        !            31:  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
        !            32:  */
        !            33: #include <sys/errno.h>
        !            34: #include <sys/types.h>
        !            35: #include <sys/param.h>
        !            36: #include <machine/spl.h>
        !            37: #include <sys/systm.h>
        !            38: #include <sys/kernel.h>
        !            39: #include <sys/proc.h>
        !            40: #include <sys/filedesc.h>
        !            41: #include <sys/fcntl.h>
        !            42: #include <sys/mbuf.h>
        !            43: #include <sys/socket.h>
        !            44: #include <sys/time.h>
        !            45: 
        !            46: #include <netat/sysglue.h>
        !            47: #include <netat/appletalk.h>
        !            48: #include <netat/at_pcb.h>
        !            49: #include <netat/debug.h>
        !            50: #include <netat/adsp.h>
        !            51: #include <netat/adsp_internal.h>
        !            52: 
        !            53: extern atlock_t adspgen_lock;
        !            54: 
        !            55: /*
        !            56:  * InitContinue
        !            57:  * 
        !            58:  * Handle 2nd half of code for dsp init.  We could be called directly by 
        !            59:  * the dsp Init routine, or if a socket has to be opened, we get called 
        !            60:  * by the completion routine of the dsp open socket.
        !            61:  *
        !            62:  * INPUTS:
        !            63:  *             sp      The stream we're initing (not yet on list of streams)
        !            64:  *             pb      The user's dsp Init param block
        !            65:  *             soc The socket we're going to use
        !            66:  * OUTPUTS:
        !            67:  *             none
        !            68: */
        !            69: static void InitContinue(sp, pb) /* (CCBPtr sp, DSPPBPtr pb, int soc) */
        !            70:     CCBPtr sp;
        !            71:     struct adspcmd *pb;
        !            72: {
        !            73:     int s;
        !            74: 
        !            75:     /* Save connection's socket # in CCB */
        !            76:     sp->localSocket = pb->socket; 
        !            77: 
        !            78:     /*
        !            79:      * Link the new ccb onto queue.  Must be done with interrupts off.
        !            80:      */
        !            81:     ATDISABLE(s, adspgen_lock);
        !            82:     qAddToEnd(AT_ADSP_STREAMS, sp); /* Put on linked list of connections */
        !            83:     ATENABLE(s, adspgen_lock);
        !            84:     return;
        !            85: }
        !            86: 
        !            87: /*
        !            88:  * dspInit
        !            89:  *
        !            90:  * Create and initialize a connection end.  return ccbRefNum so that client can
        !            91:  * reference this ccb in later calls.  The caller provides a pointer to 
        !            92:  * ccb which belongs to adsp until the connection end is removed.
        !            93:  *
        !            94:  * If we have to open a socket, we'll have to do an async open socket, and 
        !            95:  * finish up in the completion routine
        !            96:  * 
        !            97:  * INPUTS:
        !            98:  *     --> ccbPtr              Pointer to connection control block
        !            99:  *     --> adspcmdPtr          Pointer to user request block
        !           100:  *
        !           101:  * OUTPUTS:
        !           102:  *     <-- ccbRefNum           refnum assigned to this connection.
        !           103:  *
        !           104:  * ERRORS:
        !           105:  *     EADDRINUSE or 0
        !           106:  */
        !           107: int adspInit(sp, ap)           /* (DSPPBPtr pb) */
        !           108:     CCBPtr sp;
        !           109:     struct adspcmd *ap;
        !           110: {
        !           111:     /*
        !           112:      * Set connection end defaults
        !           113:      */
        !           114:     sp->badSeqMax = 3;         /* # of out-of-sequence packets received */
        !           115:                                /* until a retransmit advice packet is sent */
        !           116:     sp->probeInterval = 6 * 30;        /* 30 second probe interval */
        !           117:     sp->rtmtInterval = 6 * 5;  /* Just a guess --- 5 seconds */
        !           118:     sp->sendBlocking = 16;
        !           119:     sp->sendInterval = 6;
        !           120:     sp->badSeqMax = 3;         /* This is the default */
        !           121:        
        !           122:     sp->ProbeTimer.type        = kProbeTimerType;
        !           123:     sp->FlushTimer.type = kFlushTimerType;
        !           124:     sp->RetryTimer.type = kRetryTimerType;
        !           125:     sp->AttnTimer.type = kAttnTimerType;
        !           126:     sp->ResetTimer.type = kResetTimerType;
        !           127:        
        !           128:     if (ap->csCode == dspInit) { /* Only do this if not connection Listener */
        !           129:        /*
        !           130:         * Initialize send and receive queue.  Make sure they are the 
        !           131:         * right size
        !           132:         */
        !           133:        sp->rbuflen = RecvQSize;
        !           134:        sp->rbuf_mb = 0;
        !           135:        sp->sbuflen = SendQSize;
        !           136:        sp->sbuf_mb = 0;
        !           137:        sp->csbuf_mb = 0;
        !           138: 
        !           139:        /*
        !           140:         * Initialize send and receive defaults
        !           141:         */
        !           142:        
        !           143:        sp->attn_mb = 0;
        !           144:        sp->state = sClosed;    /* Set state for connection end */
        !           145:        /* end dspInit */           
        !           146:     } else {  
        !           147:        
        !           148:        /* dspCLInit */
        !           149:        sp->state = sListening;               /* Set state for conn end */
        !           150:     }      /* end dspCLInit */
        !           151:     /*
        !           152:      * User opens the socket, so continue with the init stuff
        !           153:      */
        !           154:     InitContinue(sp, ap);
        !           155:     return(0);
        !           156: }
        !           157: 
        !           158: 
        !           159: /*
        !           160:  * AdspBad
        !           161:  *
        !           162:  * 
        !           163:  * INPUTS:
        !           164:  *     -->     ap                              Parameter block
        !           165:  *
        !           166:  */
        !           167: int AdspBad(ap)                        /* (DSPPBPtr pb) */
        !           168:     struct adspcmd *ap;
        !           169: {
        !           170:        dPrintf(D_M_ADSP, D_L_ERROR, 
        !           171:                ("Hey! Do you have the right AuthToolbox?"));
        !           172:        ap->ioResult = controlErr; /* Unknown csCode in the param block */
        !           173:        return EINVAL;
        !           174: }

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