[apple/xnu.git] / bsd / netat / adsp.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * 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.
 */
#define RESOLVE_DBG
#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 <netat/sysglue.h>
#include <netat/appletalk.h>
#include <netat/at_pcb.h>
#include <netat/ddp.h>
#include <netat/adsp.h>
#include <netat/adsp_internal.h>

#ifdef notdefn
struct adsp_debug adsp_dtable[1025];
int ad_entry = 0;
#endif

extern atlock_t adspgen_lock;

adspAllocateCCB(gref)
    register gref_t *gref;	/* READ queue */
{
    gbuf_t *ccb_mp;
    register CCBPtr sp;

    if (!(ccb_mp = gbuf_alloc(sizeof(CCB), PRI_LO))) {
        return (0);
    }
    bzero((caddr_t) gbuf_rptr(ccb_mp), sizeof(CCB));
    gbuf_wset(ccb_mp,sizeof(CCB));
    gref->info = (caddr_t) ccb_mp;
    sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));

    sp->pid = gref->pid; /* save the caller process pointer */
    sp->gref = gref;		/* save a back pointer to the WRITE queue */
    sp->sp_mp = ccb_mp;		/* and its message block */
    ATLOCKINIT(sp->lock);
    ATLOCKINIT(sp->lockClose);
    ATLOCKINIT(sp->lockRemove);
    return 1;
}

adspRelease(gref)
    register gref_t *gref;	/* READ queue */
{
    register CCBPtr sp;
    int s, l;

    ATDISABLE(l, adspgen_lock);
    if (gref->info) {
	sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
	ATDISABLE(s, sp->lock);
	ATENABLE(s, adspgen_lock);
				/* Tells completion routine of close */
				/* packet to remove us. */

	if (sp->state == sPassive || sp->state == sClosed || 
	    sp->state == sOpening || sp->state == sListening) {
	    ATENABLE(l, sp->lock);
	    if (sp->state == sListening)
		CompleteQueue(&sp->opb, errAborted);
	    sp->removing = 1;	/* Prevent allowing another dspClose. */
	    DoClose(sp, errAborted, 0); /* will remove CCB */
	    return 0;
	} else {			/* sClosing & sOpen */
	    sp->state = sClosing;
	}
	ATENABLE(l, sp->lock);

	if (CheckOkToClose(sp)) { /* going to close */
	    sp->sendCtl = B_CTL_CLOSE; /* Send close advice */
	} else {
		CheckSend(sp);	/* try one more time to send out data */
		if (sp->state != sClosed)
		    sp->sendCtl = B_CTL_CLOSE; /* Setup to send close advice */
	}
	CheckSend(sp);		/* and force out the close */
	ATDISABLE(s, sp->lock);
	    sp->removing = 1;	/* Prevent allowing another dspClose. */
	    sp->state = sClosed;
	ATENABLE(s, sp->lock);
	    DoClose(sp, errAborted, 0);  /* to closed and remove CCB */
    } else
	ATENABLE(l, adspgen_lock);
}


adspWriteHandler(gref, mp)
    gref_t *gref;			/* WRITE queue */
    gbuf_t *mp;
{

    register ioc_t *iocbp;
    register struct adspcmd *ap;
    int error, flag;
	void *sp;

    switch(gbuf_type(mp)) {
		case MSG_DATA:
		if (gref->info == 0) {
			gbuf_freem(mp);
			return(STR_IGNORE);
			}
		/*
		 * Fill in the global stuff
		 */
		ap = (struct adspcmd *)gbuf_rptr(mp);
		ap->gref = gref;
		ap->ioc = 0;
		ap->mp = mp;
		sp = (void *)gbuf_rptr(((gbuf_t *)gref->info));
		switch(ap->csCode) {
			case dspWrite:
				if ((error = adspWrite(sp, ap)))
				gbuf_freem(mp);
				return(STR_IGNORE);
			case dspAttention:
				if ((error = adspAttention(sp, ap)))
				gbuf_freem(mp);
				return(STR_IGNORE);
		}
		case MSG_IOCTL:
		if (gref->info == 0) {
			adspioc_ack(EPROTOTYPE, mp, gref);
			return(STR_IGNORE);
			}
		iocbp = (ioc_t *) gbuf_rptr(mp);
		if (ADSP_IOCTL(iocbp->ioc_cmd)) {
			iocbp->ioc_count = sizeof(*ap) - 1;
			if (gbuf_cont(mp) == 0) {
			adspioc_ack(EINVAL, mp, gref);
			return(STR_IGNORE);
			}
			ap = (struct adspcmd *) gbuf_rptr(gbuf_cont(mp));
			ap->gref = gref;
			ap->ioc = (caddr_t) mp;
			ap->mp = gbuf_cont(mp); /* request head */
			ap->ioResult = 0;
	
			if ((gref->info == 0) && ((iocbp->ioc_cmd != ADSPOPEN) &&
							(iocbp->ioc_cmd != ADSPCLLISTEN))) {
				ap->ioResult = errState;
	
			adspioc_ack(EINVAL, mp, gref);
			return(STR_IGNORE);
			}
		} else
			return(STR_PUTNEXT);	/* pass it on down */	
		sp = (void *)gbuf_rptr(((gbuf_t *)gref->info));
		switch(iocbp->ioc_cmd) {
			case ADSPOPEN:
			case ADSPCLLISTEN:
				ap->socket = ((CCBPtr)sp)->localSocket;
				flag = (adspMode(ap) == ocAccept) ? 1 : 0;
				if (flag && ap->socket) {
					if (adspDeassignSocket((CCBPtr)sp) >= 0)
						ap->socket = 0;
				}
				if ((ap->socket == 0) &&
					((ap->socket = 
					  (at_socket)adspAssignSocket(gref, flag)) == 0)) {
					adspioc_ack(EADDRNOTAVAIL, mp, gref);
					return(STR_IGNORE);
				}
				ap->csCode = iocbp->ioc_cmd == ADSPOPEN ? dspInit : dspCLInit;
				if ((error = adspInit(sp, ap)) == 0) {
				switch(ap->csCode) {
				case dspInit:
					/* and open the connection */
					ap->csCode = dspOpen;
					error = adspOpen(sp, ap);
					break;
				case dspCLInit:
					/* ADSPCLLISTEN */
					ap->csCode = dspCLListen;
					error = adspCLListen(sp, ap);
					break;
				}
				}
				if (error) 
				adspioc_ack(error, mp, gref); /* if this failed req complete */
				return(STR_IGNORE);
			case ADSPCLOSE:
				ap->csCode = dspClose;
				if ((error = adspClose(sp, ap))) {
				adspioc_ack(error, mp, gref);
				break;
				}
				break;
			case ADSPCLREMOVE:
				ap->csCode = dspCLRemove;
				error = adspClose(sp, ap);
				adspioc_ack(error, mp, gref);
				return(STR_IGNORE);
			case ADSPCLDENY:
				ap->csCode = dspCLDeny;
				if ((error = adspCLDeny(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			case ADSPSTATUS:
				ap->csCode = dspStatus;
				if ((error = adspStatus(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			case ADSPREAD:
				ap->csCode = dspRead;
				if ((error = adspRead(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			case ADSPATTENTION:
				ap->csCode = dspAttention;
				if ((error = adspReadAttention(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			case ADSPOPTIONS:
				ap->csCode = dspOptions;
				if ((error = adspOptions(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			case ADSPRESET:
				ap->csCode = dspReset;
				if ((error = adspReset(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			case ADSPNEWCID:
				ap->csCode = dspNewCID;
				if ((error = adspNewCID(sp, ap))) {
				adspioc_ack(error, mp, gref);
				}
				return(STR_IGNORE);
			default:
				return(STR_PUTNEXT);	/* pass it on down */
		}
		return(STR_IGNORE);
		case MSG_PROTO:
		default:
		gbuf_freem(mp);
    }
}


adspReadHandler(gref, mp)
    gref_t *gref;
    gbuf_t *mp;
{
    int error;

    switch(gbuf_type(mp)) {
    case MSG_DATA:
	if ((error = adspPacket(gref, mp))) {
	    gbuf_freem(mp);
	}
	break;
	
    case MSG_IOCTL:
    default:
	return(STR_PUTNEXT);
	break;
    }
    return(STR_IGNORE);
}

/*
 * adsp_sendddp()
 *
 * Description:
 *      This procedure a formats a DDP datagram header and calls the
 *      DDP module to queue it for routing and transmission according to
 *      the DDP parameters.  We always take control of the datagram;
 *      if there is an error we free it, otherwise we pass it to the next
 *      layer.  We don't need to set the src address fileds because the
 *      DDP layer fills these in for us.
 *
 * Calling Sequence:
 *      ret_status = adsp_sendddp(q, sp, mp, length, dstnetaddr, ddptype);
 *
 * Formal Parameters:
 *	sp		Caller stream pointer
 *      mp              gbuf_t chain containing the datagram to transmit
 *			The first mblk contains the ADSP header and space
 *			for the DDP header.
 *      length          size of data portion of datagram
 *      dstnetaddr      address of 4-byte destination internet address
 *      ddptype         DDP protocol to assign to the datagram
 *
 * Completion Status:
 *      0               Procedure successful completed.
 *      EMSGSIZE        Specified datagram length is too big.
 *
 * Side Effects:
 *      NONE
 */

adsp_sendddp(sp, mp, length, dstnetaddr, ddptype)
   CCBPtr sp;
   gbuf_t *mp;
   int length;
   AddrUnion *dstnetaddr;
   int ddptype;
{
   DDPX_FRAME   *ddp;
   gbuf_t *mlist = mp;

   if (mp == 0)
       return EINVAL;

   if (length > DDP_DATA_SIZE) {
       gbuf_freel(mlist);
       return EMSGSIZE;
   }

  while (mp) {

   if (length == 0)
       length = gbuf_msgsize(mp) - DDPL_FRAME_LEN;
   /* Set up the DDP header */

   ddp = (DDPX_FRAME *) gbuf_rptr(mp);
   UAS_ASSIGN(ddp->ddpx_length, (length + DDPL_FRAME_LEN));
   UAS_ASSIGN(ddp->ddpx_cksm, 0);
   if (sp) {
	if (sp->useCheckSum)
	   UAS_ASSIGN(ddp->ddpx_cksm, 1);
   }

   NET_ASSIGN(ddp->ddpx_dnet, dstnetaddr->a.net);
   ddp->ddpx_dnode = dstnetaddr->a.node;
   ddp->ddpx_source = sp ? sp->localSocket : ddp->ddpx_dest;
   ddp->ddpx_dest = dstnetaddr->a.socket;

   ddp->ddpx_type = ddptype;
   length = 0;
   mp = gbuf_next(mp);

  }
	   
   DDP_OUTPUT(mlist);
   return 0;
}

void NotifyUser(sp)
    register CCBPtr sp;

{
/*
    pidsig(sp->pid, SIGIO);
*/
}

void UrgentUser(sp)
    register CCBPtr sp;
{
/*
    pidsig(sp->pid, SIGURG);
*/
}
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
6601e61a	4	* @APPLE_LICENSE_HEADER_START@
1c79356b	5	*
6601e61a A	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.
8f6c56a5	11	*
6601e61a A	12	* This Original Code and all software distributed under the License are
6601e61a A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
6601e61a A	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.
8f6c56a5	19	*
6601e61a	20	* @APPLE_LICENSE_HEADER_END@
1c79356b A	21	*/
	22	/*
	23	* Change log:
	24	* 06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen)
	25	* Modified for MP, 1996 by Tuyen Nguyen
	26	* Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
	27	*/
	28	#define RESOLVE_DBG
	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/ddp.h>
	45	#include <netat/adsp.h>
	46	#include <netat/adsp_internal.h>
	47
	48	#ifdef notdefn
	49	struct adsp_debug adsp_dtable[1025];
	50	int ad_entry = 0;
	51	#endif
	52
6601e61a	53	extern atlock_t adspgen_lock;
1c79356b A	54
	55	adspAllocateCCB(gref)
	56	register gref_t gref; / READ queue */
	57	{
	58	gbuf_t *ccb_mp;
	59	register CCBPtr sp;
	60
	61	if (!(ccb_mp = gbuf_alloc(sizeof(CCB), PRI_LO))) {
	62	return (0);
	63	}
	64	bzero((caddr_t) gbuf_rptr(ccb_mp), sizeof(CCB));
	65	gbuf_wset(ccb_mp,sizeof(CCB));
	66	gref->info = (caddr_t) ccb_mp;
	67	sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
	68
	69	sp->pid = gref->pid; /* save the caller process pointer */
	70	sp->gref = gref; /* save a back pointer to the WRITE queue */
	71	sp->sp_mp = ccb_mp; /* and its message block */
6601e61a A	72	ATLOCKINIT(sp->lock);
	73	ATLOCKINIT(sp->lockClose);
	74	ATLOCKINIT(sp->lockRemove);
1c79356b A	75	return 1;
	76	}
	77
	78	adspRelease(gref)
	79	register gref_t gref; / READ queue */
	80	{
	81	register CCBPtr sp;
6601e61a	82	int s, l;
1c79356b	83
6601e61a	84	ATDISABLE(l, adspgen_lock);
1c79356b A	85	if (gref->info) {
1c79356b A	86	sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
6601e61a A	87	ATDISABLE(s, sp->lock);
6601e61a A	88	ATENABLE(s, adspgen_lock);
1c79356b A	89	/* Tells completion routine of close */
	90	/* packet to remove us. */
	91
	92	if (sp->state == sPassive \|\| sp->state == sClosed \|\|
	93	sp->state == sOpening \|\| sp->state == sListening) {
6601e61a	94	ATENABLE(l, sp->lock);
1c79356b A	95	if (sp->state == sListening)
	96	CompleteQueue(&sp->opb, errAborted);
	97	sp->removing = 1; /* Prevent allowing another dspClose. */
	98	DoClose(sp, errAborted, 0); /* will remove CCB */
	99	return 0;
	100	} else { /* sClosing & sOpen */
	101	sp->state = sClosing;
	102	}
6601e61a	103	ATENABLE(l, sp->lock);
1c79356b A	104
	105	if (CheckOkToClose(sp)) { /* going to close */
	106	sp->sendCtl = B_CTL_CLOSE; /* Send close advice */
	107	} else {
	108	CheckSend(sp); /* try one more time to send out data */
	109	if (sp->state != sClosed)
	110	sp->sendCtl = B_CTL_CLOSE; /* Setup to send close advice */
	111	}
	112	CheckSend(sp); /* and force out the close */
6601e61a	113	ATDISABLE(s, sp->lock);
1c79356b A	114	sp->removing = 1; /* Prevent allowing another dspClose. */
1c79356b A	115	sp->state = sClosed;
6601e61a	116	ATENABLE(s, sp->lock);
1c79356b	117	DoClose(sp, errAborted, 0); /* to closed and remove CCB */
6601e61a A	118	} else
6601e61a A	119	ATENABLE(l, adspgen_lock);
1c79356b A	120	}
	121
	122
	123
	124
	125	adspWriteHandler(gref, mp)
	126	gref_t gref; / WRITE queue */
	127	gbuf_t *mp;
	128	{
	129
	130	register ioc_t *iocbp;
	131	register struct adspcmd *ap;
	132	int error, flag;
	133	void *sp;
	134
	135	switch(gbuf_type(mp)) {
91447636 A	136	case MSG_DATA:
	137	if (gref->info == 0) {
	138	gbuf_freem(mp);
	139	return(STR_IGNORE);
	140	}
	141	/*
	142	* Fill in the global stuff
	143	*/
	144	ap = (struct adspcmd *)gbuf_rptr(mp);
	145	ap->gref = gref;
	146	ap->ioc = 0;
	147	ap->mp = mp;
	148	sp = (void )gbuf_rptr(((gbuf_t )gref->info));
1c79356b	149	switch(ap->csCode) {
91447636 A	150	case dspWrite:
	151	if ((error = adspWrite(sp, ap)))
	152	gbuf_freem(mp);
	153	return(STR_IGNORE);
	154	case dspAttention:
	155	if ((error = adspAttention(sp, ap)))
	156	gbuf_freem(mp);
	157	return(STR_IGNORE);
1c79356b	158	}
91447636 A	159	case MSG_IOCTL:
	160	if (gref->info == 0) {
	161	adspioc_ack(EPROTOTYPE, mp, gref);
	162	return(STR_IGNORE);
	163	}
	164	iocbp = (ioc_t *) gbuf_rptr(mp);
	165	if (ADSP_IOCTL(iocbp->ioc_cmd)) {
	166	iocbp->ioc_count = sizeof(*ap) - 1;
	167	if (gbuf_cont(mp) == 0) {
	168	adspioc_ack(EINVAL, mp, gref);
	169	return(STR_IGNORE);
	170	}
	171	ap = (struct adspcmd *) gbuf_rptr(gbuf_cont(mp));
	172	ap->gref = gref;
	173	ap->ioc = (caddr_t) mp;
	174	ap->mp = gbuf_cont(mp); /* request head */
	175	ap->ioResult = 0;
	176
	177	if ((gref->info == 0) && ((iocbp->ioc_cmd != ADSPOPEN) &&
	178	(iocbp->ioc_cmd != ADSPCLLISTEN))) {
	179	ap->ioResult = errState;
	180
	181	adspioc_ack(EINVAL, mp, gref);
	182	return(STR_IGNORE);
	183	}
	184	} else
	185	return(STR_PUTNEXT); /* pass it on down */
	186	sp = (void )gbuf_rptr(((gbuf_t )gref->info));
	187	switch(iocbp->ioc_cmd) {
	188	case ADSPOPEN:
	189	case ADSPCLLISTEN:
	190	ap->socket = ((CCBPtr)sp)->localSocket;
	191	flag = (adspMode(ap) == ocAccept) ? 1 : 0;
	192	if (flag && ap->socket) {
	193	if (adspDeassignSocket((CCBPtr)sp) >= 0)
	194	ap->socket = 0;
	195	}
	196	if ((ap->socket == 0) &&
	197	((ap->socket =
	198	(at_socket)adspAssignSocket(gref, flag)) == 0)) {
	199	adspioc_ack(EADDRNOTAVAIL, mp, gref);
	200	return(STR_IGNORE);
	201	}
	202	ap->csCode = iocbp->ioc_cmd == ADSPOPEN ? dspInit : dspCLInit;
	203	if ((error = adspInit(sp, ap)) == 0) {
	204	switch(ap->csCode) {
	205	case dspInit:
	206	/* and open the connection */
	207	ap->csCode = dspOpen;
	208	error = adspOpen(sp, ap);
	209	break;
	210	case dspCLInit:
	211	/* ADSPCLLISTEN */
	212	ap->csCode = dspCLListen;
	213	error = adspCLListen(sp, ap);
	214	break;
	215	}
	216	}
	217	if (error)
	218	adspioc_ack(error, mp, gref); /* if this failed req complete */
	219	return(STR_IGNORE);
	220	case ADSPCLOSE:
	221	ap->csCode = dspClose;
	222	if ((error = adspClose(sp, ap))) {
223	adspioc_ack(error, mp, gref);
224	break;
225	}
226	break;
227	case ADSPCLREMOVE:
228	ap->csCode = dspCLRemove;
229	error = adspClose(sp, ap);
230	adspioc_ack(error, mp, gref);
231	return(STR_IGNORE);
232	case ADSPCLDENY:
233	ap->csCode = dspCLDeny;
234	if ((error = adspCLDeny(sp, ap))) {
235	adspioc_ack(error, mp, gref);
236	}
237	return(STR_IGNORE);
238	case ADSPSTATUS:
239	ap->csCode = dspStatus;
240	if ((error = adspStatus(sp, ap))) {
241	adspioc_ack(error, mp, gref);
242	}
243	return(STR_IGNORE);
244	case ADSPREAD:
245	ap->csCode = dspRead;
246	if ((error = adspRead(sp, ap))) {
247	adspioc_ack(error, mp, gref);
248	}
249	return(STR_IGNORE);
250	case ADSPATTENTION:
251	ap->csCode = dspAttention;
252	if ((error = adspReadAttention(sp, ap))) {
253	adspioc_ack(error, mp, gref);
254	}
255	return(STR_IGNORE);
256	case ADSPOPTIONS:
257	ap->csCode = dspOptions;
258	if ((error = adspOptions(sp, ap))) {
259	adspioc_ack(error, mp, gref);
260	}
261	return(STR_IGNORE);
262	case ADSPRESET:
263	ap->csCode = dspReset;
264	if ((error = adspReset(sp, ap))) {
265	adspioc_ack(error, mp, gref);
266	}
267	return(STR_IGNORE);
268	case ADSPNEWCID:
269	ap->csCode = dspNewCID;
270	if ((error = adspNewCID(sp, ap))) {
271	adspioc_ack(error, mp, gref);
272	}
273	return(STR_IGNORE);
274	default:
275	return(STR_PUTNEXT); /* pass it on down */
276	}
277	return(STR_IGNORE);
278	case MSG_PROTO:
279	default:
280	gbuf_freem(mp);
1c79356b A	281	}
	282	}
	283
	284
	285	adspReadHandler(gref, mp)
	286	gref_t *gref;
	287	gbuf_t *mp;
	288	{
	289	int error;
	290
	291	switch(gbuf_type(mp)) {
	292	case MSG_DATA:
	293	if ((error = adspPacket(gref, mp))) {
	294	gbuf_freem(mp);
	295	}
	296	break;
	297
	298	case MSG_IOCTL:
	299	default:
	300	return(STR_PUTNEXT);
	301	break;
	302	}
	303	return(STR_IGNORE);
	304	}
	305
	306	/*
	307	* adsp_sendddp()
	308	*
	309	* Description:
	310	* This procedure a formats a DDP datagram header and calls the
	311	* DDP module to queue it for routing and transmission according to
	312	* the DDP parameters. We always take control of the datagram;
	313	* if there is an error we free it, otherwise we pass it to the next
	314	* layer. We don't need to set the src address fileds because the
	315	* DDP layer fills these in for us.
	316	*
	317	* Calling Sequence:
	318	* ret_status = adsp_sendddp(q, sp, mp, length, dstnetaddr, ddptype);
	319	*
	320	* Formal Parameters:
	321	* sp Caller stream pointer
	322	* mp gbuf_t chain containing the datagram to transmit
	323	* The first mblk contains the ADSP header and space
	324	* for the DDP header.
	325	* length size of data portion of datagram
	326	* dstnetaddr address of 4-byte destination internet address
	327	* ddptype DDP protocol to assign to the datagram
	328	*
	329	* Completion Status:
	330	* 0 Procedure successful completed.
	331	* EMSGSIZE Specified datagram length is too big.
	332	*
	333	* Side Effects:
	334	* NONE
	335	*/
	336
	337	adsp_sendddp(sp, mp, length, dstnetaddr, ddptype)
	338	CCBPtr sp;
	339	gbuf_t *mp;
	340	int length;
	341	AddrUnion *dstnetaddr;
	342	int ddptype;
	343	{
	344	DDPX_FRAME *ddp;
345	gbuf_t *mlist = mp;
346
347	if (mp == 0)
348	return EINVAL;
349
350	if (length > DDP_DATA_SIZE) {
351	gbuf_freel(mlist);
352	return EMSGSIZE;
353	}
354
355	while (mp) {
356
357	if (length == 0)
358	length = gbuf_msgsize(mp) - DDPL_FRAME_LEN;
359	/* Set up the DDP header */
360
361	ddp = (DDPX_FRAME *) gbuf_rptr(mp);
6601e61a	362	UAS_ASSIGN(ddp->ddpx_length, (length + DDPL_FRAME_LEN));
1c79356b A	363	UAS_ASSIGN(ddp->ddpx_cksm, 0);
	364	if (sp) {
	365	if (sp->useCheckSum)
6601e61a	366	UAS_ASSIGN(ddp->ddpx_cksm, 1);
1c79356b A	367	}
	368
	369	NET_ASSIGN(ddp->ddpx_dnet, dstnetaddr->a.net);
	370	ddp->ddpx_dnode = dstnetaddr->a.node;
	371	ddp->ddpx_source = sp ? sp->localSocket : ddp->ddpx_dest;
	372	ddp->ddpx_dest = dstnetaddr->a.socket;
	373
	374	ddp->ddpx_type = ddptype;
	375	length = 0;
	376	mp = gbuf_next(mp);
	377
	378	}
	379
	380	DDP_OUTPUT(mlist);
	381	return 0;
	382	}
	383
	384	void NotifyUser(sp)
	385	register CCBPtr sp;
	386
	387	{
	388	/*
	389	pidsig(sp->pid, SIGIO);
	390	*/
	391	}
	392
	393	void UrgentUser(sp)
	394	register CCBPtr sp;
	395	{
	396	/*
	397	pidsig(sp->pid, SIGURG);
	398	*/
	399	}