2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License, Version 1.0 only
2N/A * (the "License"). You may not use this file except in compliance
2N/A * with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A
2N/A/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
2N/A/* All Rights Reserved */
2N/A
2N/A/*
2N/A * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
2N/A * Use is subject to license terms.
2N/A */
2N/A
2N/A#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.10 */
2N/A
2N/A#include "mt.h"
2N/A#include <stdlib.h>
2N/A#include <string.h>
2N/A#include <errno.h>
2N/A#include <stropts.h>
2N/A#include <sys/stream.h>
2N/A#define _SUN_TPI_VERSION 2
2N/A#include <sys/tihdr.h>
2N/A#include <sys/timod.h>
2N/A#include <xti.h>
2N/A#include <signal.h>
2N/A#include <syslog.h>
2N/A#include "tx.h"
2N/A
2N/Aint
2N/A_tx_rcvdis(int fd, struct t_discon *discon, int api_semantics)
2N/A{
2N/A struct strbuf ctlbuf;
2N/A struct strbuf databuf;
2N/A int retval;
2N/A union T_primitives *pptr;
2N/A struct _ti_user *tiptr;
2N/A int sv_errno;
2N/A int flg = 0;
2N/A int didalloc, didralloc;
2N/A int use_lookbufs = 0;
2N/A
2N/A if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
2N/A return (-1);
2N/A
2N/A /*
2N/A * Acquire per thread lock.
2N/A * Note: Lock is held across most of this routine
2N/A * including the blocking getmsg() call. This is fine
2N/A * because it is first verfied that an event is pending
2N/A */
2N/A sig_mutex_lock(&tiptr->ti_lock);
2N/A
2N/A if (tiptr->ti_servtype == T_CLTS) {
2N/A t_errno = TNOTSUPPORT;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A
2N/A if (_T_IS_XTI(api_semantics)) {
2N/A /*
2N/A * User level state verification only done for XTI
2N/A * because doing for TLI may break existing applications
2N/A */
2N/A if (!(tiptr->ti_state == T_DATAXFER ||
2N/A tiptr->ti_state == T_OUTCON ||
2N/A tiptr->ti_state == T_OUTREL ||
2N/A tiptr->ti_state == T_INREL ||
2N/A (tiptr->ti_state == T_INCON && tiptr->ti_ocnt > 0))) {
2N/A t_errno = TOUTSTATE;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A }
2N/A /*
2N/A * Handle likely scenario as special case:
2N/A * Is there a discon in look buffer as the first
2N/A * event in the lookbuffer, is so just get it.
2N/A */
2N/A if ((tiptr->ti_lookcnt > 0) &&
2N/A /* LINTED pointer cast */
2N/A (*((t_scalar_t *)tiptr->ti_lookbufs.tl_lookcbuf) == T_DISCON_IND)) {
2N/A /*
2N/A * The T_DISCON_IND is already in the look buffer
2N/A */
2N/A ctlbuf.len = tiptr->ti_lookbufs.tl_lookclen;
2N/A ctlbuf.buf = tiptr->ti_lookbufs.tl_lookcbuf;
2N/A /* Note: ctlbuf.maxlen not used in this case */
2N/A
2N/A databuf.len = tiptr->ti_lookbufs.tl_lookdlen;
2N/A databuf.buf = tiptr->ti_lookbufs.tl_lookdbuf;
2N/A /* Note databuf.maxlen not used in this case */
2N/A
2N/A use_lookbufs = 1;
2N/A
2N/A } else {
2N/A
2N/A if ((retval = _t_look_locked(fd, tiptr, 0,
2N/A api_semantics)) < 0) {
2N/A sv_errno = errno;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
2N/A }
2N/A
2N/A if (retval != T_DISCONNECT) {
2N/A t_errno = TNODIS;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A
2N/A /*
2N/A * get disconnect off read queue.
2N/A * use ctl and rcv buffers
2N/A *
2N/A * Acquire ctlbuf for use in sending/receiving control part
2N/A * of the message.
2N/A */
2N/A if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
2N/A sv_errno = errno;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
2N/A }
2N/A
2N/A /*
2N/A * Acquire databuf for use in sending/receiving data part
2N/A */
2N/A if (_t_acquire_databuf(tiptr, &databuf, &didralloc) < 0) {
2N/A sv_errno = errno;
2N/A if (didalloc)
2N/A free(ctlbuf.buf);
2N/A else
2N/A tiptr->ti_ctlbuf = ctlbuf.buf;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
2N/A }
2N/A
2N/A /*
2N/A * Since we already verified that a disconnect event
2N/A * is present, we assume that this getmsg() cannot
2N/A * block indefinitely
2N/A */
2N/A do {
2N/A retval = getmsg(fd, &ctlbuf, &databuf, &flg);
2N/A } while (retval < 0 && errno == EINTR);
2N/A
2N/A if (retval < 0) {
2N/A t_errno = TSYSERR;
2N/A goto err_out;
2N/A }
2N/A if (databuf.len == -1) databuf.len = 0;
2N/A
2N/A /*
2N/A * did I get entire message?
2N/A */
2N/A if (retval > 0) {
2N/A t_errno = TSYSERR;
2N/A errno = EIO;
2N/A goto err_out;
2N/A }
2N/A }
2N/A
2N/A
2N/A /* LINTED pointer cast */
2N/A pptr = (union T_primitives *)ctlbuf.buf;
2N/A
2N/A if ((ctlbuf.len < (int)sizeof (struct T_discon_ind)) ||
2N/A (pptr->type != T_DISCON_IND)) {
2N/A t_errno = TSYSERR;
2N/A errno = EPROTO;
2N/A goto err_out;
2N/A }
2N/A
2N/A /*
2N/A * clear more and expedited flags
2N/A */
2N/A tiptr->ti_flags &= ~(MORE | EXPEDITED);
2N/A
2N/A if (tiptr->ti_ocnt <= 0) {
2N/A _T_TX_NEXTSTATE(T_RCVDIS1, tiptr,
2N/A "t_rcvdis: invalid state event T_RCVDIS1");
2N/A } else {
2N/A if (tiptr->ti_ocnt == 1) {
2N/A _T_TX_NEXTSTATE(T_RCVDIS2, tiptr,
2N/A "t_rcvdis: invalid state event T_RCVDIS2");
2N/A } else {
2N/A _T_TX_NEXTSTATE(T_RCVDIS3, tiptr,
2N/A "t_rcvdis: invalid state event T_RCVDIS3");
2N/A }
2N/A tiptr->ti_ocnt--;
2N/A tiptr->ti_flags &= ~TX_TQFULL_NOTIFIED;
2N/A }
2N/A
2N/A if (discon != NULL) {
2N/A if (_T_IS_TLI(api_semantics) || discon->udata.maxlen > 0) {
2N/A if (databuf.len > (int)discon->udata.maxlen) {
2N/A t_errno = TBUFOVFLW;
2N/A goto err_out;
2N/A }
2N/A (void) memcpy(discon->udata.buf, databuf.buf,
2N/A (size_t)databuf.len);
2N/A discon->udata.len = databuf.len;
2N/A }
2N/A discon->reason = pptr->discon_ind.DISCON_reason;
2N/A discon->sequence = pptr->discon_ind.SEQ_number;
2N/A }
2N/A if (use_lookbufs)
2N/A _t_free_looklist_head(tiptr);
2N/A else {
2N/A if (didalloc)
2N/A free(ctlbuf.buf);
2N/A else
2N/A tiptr->ti_ctlbuf = ctlbuf.buf;
2N/A if (didralloc)
2N/A free(databuf.buf);
2N/A else
2N/A tiptr->ti_rcvbuf = databuf.buf;
2N/A }
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (0);
2N/A
2N/Aerr_out:
2N/A sv_errno = errno;
2N/A
2N/A if (use_lookbufs)
2N/A _t_free_looklist_head(tiptr);
2N/A else {
2N/A if (didalloc)
2N/A free(ctlbuf.buf);
2N/A else
2N/A tiptr->ti_ctlbuf = ctlbuf.buf;
2N/A if (didralloc)
2N/A free(databuf.buf);
2N/A else
2N/A tiptr->ti_rcvbuf = databuf.buf;
2N/A }
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
2N/A}