/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.4.3.1 */ #include "mt.h" #include <errno.h> #include <unistd.h> #include <stropts.h> #include <sys/stream.h> #define _SUN_TPI_VERSION 2 #include <sys/tihdr.h> #include <sys/timod.h> #include <xti.h> #include <signal.h> #include <syslog.h> #include "tx.h" int _tx_snddis(int fd, const struct t_call *call, int api_semantics) { struct T_discon_req dreq; struct strbuf ctlbuf; struct strbuf databuf; struct _ti_user *tiptr; int sv_errno; int retval; if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) return (-1); sig_mutex_lock(&tiptr->ti_lock); if (tiptr->ti_servtype == T_CLTS) { t_errno = TNOTSUPPORT; sig_mutex_unlock(&tiptr->ti_lock); return (-1); } if (_T_IS_XTI(api_semantics)) { /* * User level state verification only done for XTI * because doing for TLI may break existing applications * Note: This is documented in TLI man page but never * done. */ if (!(tiptr->ti_state == T_DATAXFER || tiptr->ti_state == T_OUTCON || tiptr->ti_state == T_OUTREL || tiptr->ti_state == T_INREL || (tiptr->ti_state == T_INCON && tiptr->ti_ocnt > 0))) { t_errno = TOUTSTATE; sig_mutex_unlock(&tiptr->ti_lock); return (-1); } /* * Following check only done for XTI as it may be a risk * to existing buggy TLI applications. */ } if (call != NULL && call->udata.len) { if ((tiptr->ti_ddatasize == T_INVALID /* -2 */) || ((tiptr->ti_ddatasize != T_INFINITE /* -1*/) && (call->udata.len > (uint32_t)tiptr->ti_ddatasize))) { /* * user data not valid with disconnect or it * exceeds the limits specified by the * transport provider */ t_errno = TBADDATA; sig_mutex_unlock(&tiptr->ti_lock); return (-1); } } /* * If disconnect is done on a listener, the 'call' parameter * must be non-null */ if ((tiptr->ti_state == T_INCON) && (call == NULL)) { t_errno = TBADSEQ; sig_mutex_unlock(&tiptr->ti_lock); return (-1); } /* * look at look buffer to see if there is a discon there */ if (_t_look_locked(fd, tiptr, 0, api_semantics) == T_DISCONNECT) { t_errno = TLOOK; sig_mutex_unlock(&tiptr->ti_lock); return (-1); } if ((tiptr->ti_lookcnt > 0) && (call == 0)) _t_flush_lookevents(tiptr); /* flush but not on listener */ do { retval = ioctl(fd, I_FLUSH, FLUSHW); } while (retval < 0 && errno == EINTR); if (retval < 0) { sv_errno = errno; t_errno = TSYSERR; sig_mutex_unlock(&tiptr->ti_lock); errno = sv_errno; return (-1); } ctlbuf.len = (int)sizeof (struct T_discon_req); ctlbuf.maxlen = (int)sizeof (struct T_discon_req); ctlbuf.buf = (char *)&dreq; dreq.PRIM_type = T_DISCON_REQ; dreq.SEQ_number = (call? call->sequence: -1); databuf.maxlen = (call? call->udata.len: 0); databuf.len = (call? call->udata.len: 0); databuf.buf = (call? call->udata.buf: NULL); /* * Calls to send data (write or putmsg) can potentially * block, for MT case, we drop the lock and enable signals here * and acquire it back */ sig_mutex_unlock(&tiptr->ti_lock); if (putmsg(fd, &ctlbuf, (databuf.len? &databuf: NULL), 0) < 0) { t_errno = TSYSERR; return (-1); } sig_mutex_lock(&tiptr->ti_lock); if (_t_is_ok(fd, tiptr, T_DISCON_REQ) < 0) { sv_errno = errno; sig_mutex_unlock(&tiptr->ti_lock); errno = sv_errno; return (-1); } tiptr->ti_flags &= ~(MORE|EXPEDITED); if (tiptr->ti_ocnt <= 1) { if (tiptr->ti_state == T_INCON) { tiptr->ti_ocnt--; tiptr->ti_flags &= ~TX_TQFULL_NOTIFIED; } _T_TX_NEXTSTATE(T_SNDDIS1, tiptr, "t_snddis: invalid state event T_SNDDIS1"); } else { if (tiptr->ti_state == T_INCON) { tiptr->ti_ocnt--; tiptr->ti_flags &= ~TX_TQFULL_NOTIFIED; } _T_TX_NEXTSTATE(T_SNDDIS2, tiptr, "t_snddis: invalid state event T_SNDDIS2"); } sig_mutex_unlock(&tiptr->ti_lock); return (0); }