| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 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 License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * dspAttention.c |
| | 30 | * |
| | 31 | * From Mike Shoemaker v01.05 03/16/90 mbs |
| | 32 | */ |
| | 33 | /* |
| | 34 | * Change log: |
| | 35 | * 06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen) |
| | 36 | * Modified for MP, 1996 by Tuyen Nguyen |
| | 37 | * Modified, April 9, 1997 by Tuyen Nguyen for MacOSX. |
| | 38 | */ |
| | 39 | |
| | 40 | #include <sys/errno.h> |
| | 41 | #include <sys/types.h> |
| | 42 | #include <sys/param.h> |
| | 43 | #include <machine/spl.h> |
| | 44 | #include <sys/systm.h> |
| | 45 | #include <sys/kernel.h> |
| | 46 | #include <sys/proc.h> |
| | 47 | #include <sys/filedesc.h> |
| | 48 | #include <sys/fcntl.h> |
| | 49 | #include <sys/mbuf.h> |
| | 50 | #include <sys/socket.h> |
| | 51 | |
| | 52 | #include <netat/sysglue.h> |
| | 53 | #include <netat/appletalk.h> |
| | 54 | #include <netat/at_pcb.h> |
| | 55 | #include <netat/debug.h> |
| | 56 | #include <netat/adsp.h> |
| | 57 | #include <netat/adsp_internal.h> |
| | 58 | |
| | 59 | /* |
| | 60 | * dspAttention |
| | 61 | * |
| | 62 | * INPUTS: |
| | 63 | * --> ccbRefNum refnum of connection end |
| | 64 | * --> attnCode client attention code |
| | 65 | * --> attnSize size in bytes of attention data |
| | 66 | * --> attnData pointer to attention data |
| | 67 | * --> attnInterval attention retransmit interval |
| | 68 | * (ignored by ADSP 1.5 & up) |
| | 69 | * |
| | 70 | * OUTPUTS: |
| | 71 | * none |
| | 72 | * |
| | 73 | * ERRORS: |
| | 74 | * errRefNum bad connection refnum |
| | 75 | * errState connection is not open |
| | 76 | * errAttention attention message too long |
| | 77 | * errAborted request aborted by Remove or Close call |
| | 78 | */ |
| | 79 | int adspAttention(register struct adspcmd *pb, register CCBPtr sp) |
| | 80 | { |
| | 81 | int s; |
| | 82 | register gbuf_t *mp, *nmp; |
| | 83 | unsigned char uerr; |
| | 84 | |
| | 85 | if (sp == 0) { |
| | 86 | pb->ioResult = errRefNum; |
| | 87 | return EINVAL; |
| | 88 | } |
| | 89 | |
| | 90 | if (sp->state != sOpen) { /* If we're not open, tell user to go away */ |
| | 91 | pb->ioResult = errState; |
| | 92 | uerr = ENOTCONN; |
| | 93 | l_err: |
| | 94 | atalk_notify(sp->gref, uerr); |
| | 95 | gbuf_freem(pb->mp); |
| | 96 | return 0; |
| | 97 | } |
| | 98 | |
| | 99 | if (pb->u.attnParams.attnSize > attnBufSize) /* If data too big, bye-bye */ |
| | 100 | { |
| | 101 | pb->ioResult = errAttention; |
| | 102 | uerr = ERANGE; |
| | 103 | goto l_err; |
| | 104 | } |
| | 105 | |
| | 106 | /* The 1st mbuf in the pb->mp chain (mp) is the adspcmd structure. |
| | 107 | The 2nd mbuf (nmp) will be the beginning of the data. */ |
| | 108 | mp = pb->mp; |
| | 109 | if (pb->u.attnParams.attnSize) { |
| | 110 | nmp = gbuf_cont(mp); |
| | 111 | if (gbuf_len(mp) > sizeof(struct adspcmd)) { |
| | 112 | if ((nmp = gbuf_dupb(mp)) == 0) { |
| | 113 | gbuf_wset(mp, sizeof(struct adspcmd)); |
| | 114 | uerr = ENOBUFS; |
| | 115 | goto l_err; |
| | 116 | } |
| | 117 | gbuf_wset(mp, sizeof(struct adspcmd)); |
| | 118 | gbuf_rinc(nmp, sizeof(struct adspcmd)); |
| | 119 | gbuf_cont(nmp) = gbuf_cont(mp); |
| | 120 | gbuf_cont(mp) = nmp; |
| | 121 | } |
| | 122 | } |
| | 123 | pb->ioDirection = 1; /* outgoing attention data */ |
| | 124 | ATDISABLE(s, sp->lock); |
| | 125 | if (sp->sapb) { /* Pending attentions already? */ |
| | 126 | qAddToEnd(&sp->sapb, pb); /* Just add to end of queue */ |
| | 127 | ATENABLE(s, sp->lock); |
| | 128 | } else { |
| | 129 | sp->sendAttnData = 1; /* Start off this attention */ |
| | 130 | pb->qLink = 0; |
| | 131 | sp->sapb = pb; |
| | 132 | ATENABLE(s, sp->lock); |
| | 133 | CheckSend(sp); |
| | 134 | } |
| | 135 | pb->ioResult = 1; /* indicate that the IO is not complete */ |
| | 136 | return 0; |
| | 137 | } |
projects / apple / xnu.git / blame_incremental