/* * 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@ */ /* * dspAttention.c * * From Mike Shoemaker v01.05 03/16/90 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 <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> /* * dspAttention * * INPUTS: * --> ccbRefNum refnum of connection end * --> attnCode client attention code * --> attnSize size in bytes of attention data * --> attnData pointer to attention data * --> attnInterval attention retransmit interval * (ignored by ADSP 1.5 & up) * * OUTPUTS: * none * * ERRORS: * errRefNum bad connection refnum * errState connection is not open * errAttention attention message too long * errAborted request aborted by Remove or Close call */ int adspAttention(register struct adspcmd *pb, register CCBPtr sp) { register gbuf_t *mp, *nmp; unsigned char uerr; if (sp == 0) { pb->ioResult = errRefNum; return EINVAL; } if (sp->state != sOpen) { /* If we're not open, tell user to go away */ pb->ioResult = errState; uerr = ENOTCONN; l_err: atalk_notify(sp->gref, uerr); gbuf_freem(pb->mp); return 0; } if (pb->u.attnParams.attnSize > attnBufSize) /* If data too big, bye-bye */ { pb->ioResult = errAttention; uerr = ERANGE; goto l_err; } /* The 1st mbuf in the pb->mp chain (mp) is the adspcmd structure. The 2nd mbuf (nmp) will be the beginning of the data. */ mp = pb->mp; if (pb->u.attnParams.attnSize) { nmp = gbuf_cont(mp); if (gbuf_len(mp) > sizeof(struct adspcmd)) { if ((nmp = gbuf_dupb(mp)) == 0) { gbuf_wset(mp, sizeof(struct adspcmd)); uerr = ENOBUFS; goto l_err; } gbuf_wset(mp, sizeof(struct adspcmd)); gbuf_rinc(nmp, sizeof(struct adspcmd)); gbuf_cont(nmp) = gbuf_cont(mp); gbuf_cont(mp) = nmp; } } pb->ioDirection = 1; /* outgoing attention data */ if (sp->sapb) { /* Pending attentions already? */ qAddToEnd((struct qlink **)&sp->sapb, (struct qlink *)pb); /* Just add to end of queue */ } else { sp->sendAttnData = 1; /* Start off this attention */ pb->qLink = 0; sp->sapb = pb; CheckSend(sp); } pb->ioResult = 1; /* indicate that the IO is not complete */ return 0; }