+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/*
- * Reset.c
- *
- * From v01.15 07/11/90 mbs
- */
-/*
- * Change log:
- * 06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen)
- * Modified for MP, 1996 by Tuyen Nguyen
- * Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
- */
-
-#include <sys/errno.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <machine/spl.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/proc.h>
-#include <sys/filedesc.h>
-#include <sys/fcntl.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-
-#include <netat/sysglue.h>
-#include <netat/appletalk.h>
-#include <netat/at_pcb.h>
-#include <netat/debug.h>
-#include <netat/adsp.h>
-#include <netat/adsp_internal.h>
-
-/*
- * RXFReset
- *
- * We just got a Forward Reset Packet.
- *
- * Called with interrupts OFF
- *
- * INPUTS:
- * stream pointer
- * Pointer to ADSP header,
- * OUTPUTS:
- * Returns 1 if packet was ignored
- */
-int RXFReset(sp, f) /* (CCBPtr sp, ADSP_FRAMEPtr f) */
- CCBPtr sp;
- ADSP_FRAMEPtr f;
-{
- unsigned int pktFirstByteSeq;
- unsigned int hi;
- register gbuf_t *mp;
- register struct adspcmd *pb;
-
- pktFirstByteSeq = UAL_VALUE_NTOH(f->pktFirstByteSeq);
-
- hi = sp->recvSeq + CalcRecvWdw(sp);
-
- /*
- * Must do this with interrupts OFF
- */
- if (BETWEEN(sp->recvSeq, pktFirstByteSeq, hi)) /* Is this acceptable? */
- {
- sp->recvSeq = pktFirstByteSeq;
- while ((mp = sp->rbuf_mb)) { /* clear the receive queue */
- sp->rbuf_mb = gbuf_next(mp);
- gbuf_freem(mp);
- }
- if (sp->crbuf_mb) {
- gbuf_freem(sp->crbuf_mb);
- sp->crbuf_mb = 0;
- }
- sp->rData = 0;
- sp->rbufFull = 0;
- sp->userFlags |= eFwdReset; /* Set forward reset received Flag */
-
- mp = gbuf_alloc(sizeof(struct adspcmd), PRI_HI);
- pb = (struct adspcmd *)gbuf_rptr(mp);
- gbuf_winc(mp,sizeof(struct adspcmd));
- pb->ioc = 0;
- pb->mp = mp;
-
- pb->csCode = dspReset;
- pb->ioResult = 0;
- completepb(sp, pb);
- sp->userFlags &= ~eFwdReset;
- }
-
- if (LTE(pktFirstByteSeq, hi)) {
- sp->sendCtl |= B_CTL_FRESETACK; /* Ack it if it's OK, or a duplicate */
- sp->callSend = 1;
- }
-
- return 0;
-}
-
-
-/*
- * RXFResetAck
- *
- * We just got a Forward Reset Acknowledgement packet
- *
- * Called with interrupts OFF
- *
- * INPUTS:
- * stream pointer
- * Pointer to ADSP header,
- * OUTPUTS:
- * Returns 1 if packet was ignored
- */
-int RXFResetAck(sp, f) /* (CCBPtr sp, ADSP_FRAMEPtr f) */
- CCBPtr sp;
- ADSP_FRAMEPtr f;
-{
- unsigned int PktNextRecvSeq;
-
- if (sp->frpb == 0) /* Not expecting frwd reset Ack packet */
- return 1;
-
- PktNextRecvSeq = UAL_VALUE_NTOH(f->pktNextRecvSeq);
-
- if (BETWEEN(sp->sendSeq, PktNextRecvSeq, sp->sendWdwSeq+1)) {
- struct adspcmd *pb;
-
- RemoveTimerElem(&adspGlobal.fastTimers, &sp->ResetTimer);
- /* Remove timer */
-
- /*
- * Interrupts are OFF here while we muck with the linked list
- */
- pb = sp->frpb; /* Unlink copy of user's parameter block */
- sp->frpb = (struct adspcmd *)pb->qLink;
-
- pb->ioResult = 0;
- completepb(sp, pb); /* complete(pb, 0); */
-
- if (sp->state == sClosing) /* this ack may allow us to close... */
- CheckOkToClose(sp);
-
- if (sp->frpb) /* Another to send? */
- {
- sp->callSend = 1;
- sp->sendCtl |= B_CTL_FRESET;
- }
- }
-
- return 0;
-}
-
-
-/*
- * dspReset
- *
- * INPUTS:
- * --> ccbRefNum refnum of connection end
- *
- * OUTPUTS:
- * none
- *
- * ERRORS:
- * errRefNum bad connection refnum
- * errState connection is not open
- * errAborted request aborted by Remove or Close call
- */
-int adspReset(sp, pb) /* (DSPPBPtr pb) */
- CCBPtr sp;
- struct adspcmd *pb;
-{
- register gbuf_t *mp;
- register struct adspcmd *rpb;
-
- if (sp == 0) {
- pb->ioResult = errRefNum;
- return EINVAL;
- }
-
- if (sp->state != sOpen) {
- pb->ioResult = errState;
- return EINVAL;
- }
-
-
- while ((mp = sp->sbuf_mb)) { /* clear the send queue */
- sp->sbuf_mb = gbuf_next(mp);
- gbuf_freem(mp);
- }
- if (sp->csbuf_mb) {
- gbuf_freem(sp->csbuf_mb);
- sp->csbuf_mb = 0;
- }
- sp->sData = 0;
- sp->writeFlush = 0;
- sp->sendCtl |= B_CTL_FRESET;
-
- sp->firstRtmtSeq = sp->sendSeq; /* Reset sequence #'s */
- if ((mp = gbuf_copym(pb->mp))) { /* copy the parameter block */
- adspioc_ack(0, (gbuf_t *)pb->ioc, pb->gref); /* release user */
- rpb = (struct adspcmd *)gbuf_rptr(mp);
- rpb->ioc = 0; /* unlink copy */
- rpb->mp = mp;
-
- qAddToEnd((struct qlink **)&sp->frpb, (struct qlink *)rpb);
- /* Hold on to pb (will be completed when */
- /* forward reset ack is received). */
- } else { /* assume it will work... but keep no
- * bookkeeping for it. yetch! */
- adspioc_ack(0, (gbuf_t *)pb->ioc, pb->gref);
- }
-
- CheckSend(sp);
- return STR_IGNORE;
-
-}
projects / apple / xnu.git / blobdiff