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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_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_LICENSE_OSREFERENCE_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


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 */
    return 1;
}

adspRelease(gref)
    register gref_t *gref;	/* READ queue */
{
    register CCBPtr sp;

    if (gref->info) {
	sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
				/* Tells completion routine of close */
				/* packet to remove us. */

	if (sp->state == sPassive || sp->state == sClosed || 
	    sp->state == sOpening || sp->state == sListening) {
	    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;
	}

	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 */
	    sp->removing = 1;	/* Prevent allowing another dspClose. */
	    sp->state = sClosed;
	    DoClose(sp, errAborted, 0);  /* to closed and remove CCB */
    } 
}


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_HTON(ddp->ddpx_length, (length + DDPL_FRAME_LEN));
   UAS_ASSIGN(ddp->ddpx_cksm, 0);
   if (sp) {
	if (sp->useCheckSum)
	   UAS_ASSIGN_HTON(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	*
8ad349bb	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
1c79356b	5	*
8ad349bb A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
1c79356b A	29	*/
	30	/*
	31	* Change log:
	32	* 06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen)
	33	* Modified for MP, 1996 by Tuyen Nguyen
	34	* Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
	35	*/
	36	#define RESOLVE_DBG
	37	#include <sys/errno.h>
	38	#include <sys/types.h>
	39	#include <sys/param.h>
	40	#include <machine/spl.h>
	41	#include <sys/systm.h>
	42	#include <sys/kernel.h>
	43	#include <sys/proc.h>
	44	#include <sys/filedesc.h>
	45	#include <sys/fcntl.h>
	46	#include <sys/mbuf.h>
	47	#include <sys/socket.h>
	48
	49	#include <netat/sysglue.h>
	50	#include <netat/appletalk.h>
	51	#include <netat/at_pcb.h>
	52	#include <netat/ddp.h>
	53	#include <netat/adsp.h>
	54	#include <netat/adsp_internal.h>
	55
	56	#ifdef notdefn
	57	struct adsp_debug adsp_dtable[1025];
	58	int ad_entry = 0;
	59	#endif
	60
1c79356b A	61
	62	adspAllocateCCB(gref)
	63	register gref_t gref; / READ queue */
	64	{
	65	gbuf_t *ccb_mp;
	66	register CCBPtr sp;
	67
	68	if (!(ccb_mp = gbuf_alloc(sizeof(CCB), PRI_LO))) {
	69	return (0);
	70	}
	71	bzero((caddr_t) gbuf_rptr(ccb_mp), sizeof(CCB));
	72	gbuf_wset(ccb_mp,sizeof(CCB));
	73	gref->info = (caddr_t) ccb_mp;
	74	sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
	75
	76	sp->pid = gref->pid; /* save the caller process pointer */
	77	sp->gref = gref; /* save a back pointer to the WRITE queue */
	78	sp->sp_mp = ccb_mp; /* and its message block */
1c79356b A	79	return 1;
	80	}
	81
	82	adspRelease(gref)
	83	register gref_t gref; / READ queue */
	84	{
	85	register CCBPtr sp;
1c79356b	86
1c79356b A	87	if (gref->info) {
1c79356b A	88	sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
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) {
1c79356b A	94	if (sp->state == sListening)
	95	CompleteQueue(&sp->opb, errAborted);
	96	sp->removing = 1; /* Prevent allowing another dspClose. */
	97	DoClose(sp, errAborted, 0); /* will remove CCB */
	98	return 0;
	99	} else { /* sClosing & sOpen */
	100	sp->state = sClosing;
	101	}
1c79356b A	102
	103	if (CheckOkToClose(sp)) { /* going to close */
	104	sp->sendCtl = B_CTL_CLOSE; /* Send close advice */
	105	} else {
	106	CheckSend(sp); /* try one more time to send out data */
	107	if (sp->state != sClosed)
	108	sp->sendCtl = B_CTL_CLOSE; /* Setup to send close advice */
	109	}
	110	CheckSend(sp); /* and force out the close */
1c79356b A	111	sp->removing = 1; /* Prevent allowing another dspClose. */
1c79356b A	112	sp->state = sClosed;
1c79356b	113	DoClose(sp, errAborted, 0); /* to closed and remove CCB */
5d5c5d0d	114	}
1c79356b A	115	}
	116
	117
	118
	119
	120	adspWriteHandler(gref, mp)
	121	gref_t gref; / WRITE queue */
	122	gbuf_t *mp;
	123	{
	124
	125	register ioc_t *iocbp;
	126	register struct adspcmd *ap;
	127	int error, flag;
	128	void *sp;
	129
	130	switch(gbuf_type(mp)) {
91447636 A	131	case MSG_DATA:
	132	if (gref->info == 0) {
	133	gbuf_freem(mp);
	134	return(STR_IGNORE);
	135	}
	136	/*
	137	* Fill in the global stuff
	138	*/
	139	ap = (struct adspcmd *)gbuf_rptr(mp);
	140	ap->gref = gref;
	141	ap->ioc = 0;
	142	ap->mp = mp;
	143	sp = (void )gbuf_rptr(((gbuf_t )gref->info));
1c79356b	144	switch(ap->csCode) {
91447636 A	145	case dspWrite:
	146	if ((error = adspWrite(sp, ap)))
	147	gbuf_freem(mp);
	148	return(STR_IGNORE);
	149	case dspAttention:
	150	if ((error = adspAttention(sp, ap)))
	151	gbuf_freem(mp);
	152	return(STR_IGNORE);
1c79356b	153	}
91447636 A	154	case MSG_IOCTL:
	155	if (gref->info == 0) {
	156	adspioc_ack(EPROTOTYPE, mp, gref);
	157	return(STR_IGNORE);
	158	}
	159	iocbp = (ioc_t *) gbuf_rptr(mp);
	160	if (ADSP_IOCTL(iocbp->ioc_cmd)) {
	161	iocbp->ioc_count = sizeof(*ap) - 1;
	162	if (gbuf_cont(mp) == 0) {
	163	adspioc_ack(EINVAL, mp, gref);
	164	return(STR_IGNORE);
	165	}
	166	ap = (struct adspcmd *) gbuf_rptr(gbuf_cont(mp));
	167	ap->gref = gref;
	168	ap->ioc = (caddr_t) mp;
	169	ap->mp = gbuf_cont(mp); /* request head */
	170	ap->ioResult = 0;
	171
	172	if ((gref->info == 0) && ((iocbp->ioc_cmd != ADSPOPEN) &&
	173	(iocbp->ioc_cmd != ADSPCLLISTEN))) {
	174	ap->ioResult = errState;
	175
	176	adspioc_ack(EINVAL, mp, gref);
	177	return(STR_IGNORE);
	178	}
	179	} else
	180	return(STR_PUTNEXT); /* pass it on down */
	181	sp = (void )gbuf_rptr(((gbuf_t )gref->info));
	182	switch(iocbp->ioc_cmd) {
	183	case ADSPOPEN:
	184	case ADSPCLLISTEN:
	185	ap->socket = ((CCBPtr)sp)->localSocket;
	186	flag = (adspMode(ap) == ocAccept) ? 1 : 0;
	187	if (flag && ap->socket) {
	188	if (adspDeassignSocket((CCBPtr)sp) >= 0)
	189	ap->socket = 0;
	190	}
	191	if ((ap->socket == 0) &&
	192	((ap->socket =
	193	(at_socket)adspAssignSocket(gref, flag)) == 0)) {
	194	adspioc_ack(EADDRNOTAVAIL, mp, gref);
	195	return(STR_IGNORE);
	196	}
	197	ap->csCode = iocbp->ioc_cmd == ADSPOPEN ? dspInit : dspCLInit;
	198	if ((error = adspInit(sp, ap)) == 0) {
	199	switch(ap->csCode) {
	200	case dspInit:
	201	/* and open the connection */
	202	ap->csCode = dspOpen;
	203	error = adspOpen(sp, ap);
	204	break;
	205	case dspCLInit:
	206	/* ADSPCLLISTEN */
	207	ap->csCode = dspCLListen;
	208	error = adspCLListen(sp, ap);
	209	break;
	210	}
	211	}
	212	if (error)
	213	adspioc_ack(error, mp, gref); /* if this failed req complete */
	214	return(STR_IGNORE);
	215	case ADSPCLOSE:
	216	ap->csCode = dspClose;
	217	if ((error = adspClose(sp, ap))) {
218	adspioc_ack(error, mp, gref);
219	break;
220	}
221	break;
222	case ADSPCLREMOVE:
223	ap->csCode = dspCLRemove;
224	error = adspClose(sp, ap);
225	adspioc_ack(error, mp, gref);
226	return(STR_IGNORE);
227	case ADSPCLDENY:
228	ap->csCode = dspCLDeny;
229	if ((error = adspCLDeny(sp, ap))) {
230	adspioc_ack(error, mp, gref);
231	}
232	return(STR_IGNORE);
233	case ADSPSTATUS:
234	ap->csCode = dspStatus;
235	if ((error = adspStatus(sp, ap))) {
236	adspioc_ack(error, mp, gref);
237	}
238	return(STR_IGNORE);
239	case ADSPREAD:
240	ap->csCode = dspRead;
241	if ((error = adspRead(sp, ap))) {
242	adspioc_ack(error, mp, gref);
243	}
244	return(STR_IGNORE);
245	case ADSPATTENTION:
246	ap->csCode = dspAttention;
247	if ((error = adspReadAttention(sp, ap))) {
248	adspioc_ack(error, mp, gref);
249	}
250	return(STR_IGNORE);
251	case ADSPOPTIONS:
252	ap->csCode = dspOptions;
253	if ((error = adspOptions(sp, ap))) {
254	adspioc_ack(error, mp, gref);
255	}
256	return(STR_IGNORE);
257	case ADSPRESET:
258	ap->csCode = dspReset;
259	if ((error = adspReset(sp, ap))) {
260	adspioc_ack(error, mp, gref);
261	}
262	return(STR_IGNORE);
263	case ADSPNEWCID:
264	ap->csCode = dspNewCID;
265	if ((error = adspNewCID(sp, ap))) {
266	adspioc_ack(error, mp, gref);
267	}
268	return(STR_IGNORE);
269	default:
270	return(STR_PUTNEXT); /* pass it on down */
271	}
272	return(STR_IGNORE);
273	case MSG_PROTO:
274	default:
275	gbuf_freem(mp);
1c79356b A	276	}
	277	}
	278
	279
	280	adspReadHandler(gref, mp)
	281	gref_t *gref;
	282	gbuf_t *mp;
	283	{
	284	int error;
	285
	286	switch(gbuf_type(mp)) {
	287	case MSG_DATA:
	288	if ((error = adspPacket(gref, mp))) {
	289	gbuf_freem(mp);
	290	}
	291	break;
	292
	293	case MSG_IOCTL:
	294	default:
	295	return(STR_PUTNEXT);
	296	break;
	297	}
	298	return(STR_IGNORE);
	299	}
	300
	301	/*
	302	* adsp_sendddp()
	303	*
	304	* Description:
	305	* This procedure a formats a DDP datagram header and calls the
	306	* DDP module to queue it for routing and transmission according to
	307	* the DDP parameters. We always take control of the datagram;
	308	* if there is an error we free it, otherwise we pass it to the next
	309	* layer. We don't need to set the src address fileds because the
	310	* DDP layer fills these in for us.
	311	*
	312	* Calling Sequence:
	313	* ret_status = adsp_sendddp(q, sp, mp, length, dstnetaddr, ddptype);
	314	*
	315	* Formal Parameters:
	316	* sp Caller stream pointer
	317	* mp gbuf_t chain containing the datagram to transmit
	318	* The first mblk contains the ADSP header and space
	319	* for the DDP header.
	320	* length size of data portion of datagram
	321	* dstnetaddr address of 4-byte destination internet address
	322	* ddptype DDP protocol to assign to the datagram
	323	*
	324	* Completion Status:
	325	* 0 Procedure successful completed.
	326	* EMSGSIZE Specified datagram length is too big.
	327	*
	328	* Side Effects:
	329	* NONE
	330	*/
	331
	332	adsp_sendddp(sp, mp, length, dstnetaddr, ddptype)
	333	CCBPtr sp;
	334	gbuf_t *mp;
	335	int length;
	336	AddrUnion *dstnetaddr;
	337	int ddptype;
	338	{
	339	DDPX_FRAME *ddp;
340	gbuf_t *mlist = mp;
341
342	if (mp == 0)
343	return EINVAL;
344
345	if (length > DDP_DATA_SIZE) {
346	gbuf_freel(mlist);
347	return EMSGSIZE;
348	}
349
350	while (mp) {
351
352	if (length == 0)
353	length = gbuf_msgsize(mp) - DDPL_FRAME_LEN;
354	/* Set up the DDP header */
355
356	ddp = (DDPX_FRAME *) gbuf_rptr(mp);
5d5c5d0d	357	UAS_ASSIGN_HTON(ddp->ddpx_length, (length + DDPL_FRAME_LEN));
1c79356b A	358	UAS_ASSIGN(ddp->ddpx_cksm, 0);
	359	if (sp) {
	360	if (sp->useCheckSum)
5d5c5d0d	361	UAS_ASSIGN_HTON(ddp->ddpx_cksm, 1);
1c79356b A	362	}
	363
	364	NET_ASSIGN(ddp->ddpx_dnet, dstnetaddr->a.net);
	365	ddp->ddpx_dnode = dstnetaddr->a.node;
	366	ddp->ddpx_source = sp ? sp->localSocket : ddp->ddpx_dest;
	367	ddp->ddpx_dest = dstnetaddr->a.socket;
	368
	369	ddp->ddpx_type = ddptype;
	370	length = 0;
	371	mp = gbuf_next(mp);
	372
	373	}
	374
	375	DDP_OUTPUT(mlist);
	376	return 0;
	377	}
	378
	379	void NotifyUser(sp)
	380	register CCBPtr sp;
	381
	382	{
	383	/*
	384	pidsig(sp->pid, SIGIO);
	385	*/
	386	}
	387
	388	void UrgentUser(sp)
	389	register CCBPtr sp;
	390	{
	391	/*
	392	pidsig(sp->pid, SIGURG);
	393	*/
	394	}