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 1.7.3.1 */
2N/A
2N/A/*
2N/A * t_rcvrel.c and t_rcvreldata.c are very similar and contain common code.
2N/A * Any changes to either of them should be reviewed to see whether they
2N/A * are applicable to the other file.
2N/A */
2N/A#include "mt.h"
2N/A#include <stdlib.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_rcvrel(int fd, 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 didalloc, didralloc;
2N/A
2N/A int flg = 0;
2N/A
2N/A if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
2N/A return (-1);
2N/A sig_mutex_lock(&tiptr->ti_lock);
2N/A
2N/A if (tiptr->ti_servtype != T_COTS_ORD) {
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_OUTREL)) {
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 if ((retval = _t_look_locked(fd, tiptr, 0, 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 /*
2N/A * This ensures preference to T_DISCON_IND which is
2N/A * the design model for TPI
2N/A */
2N/A t_errno = TLOOK;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
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_ORDREL_IND)) {
2N/A /*
2N/A * Current look buffer event is T_ORDREL_IND.
2N/A * Remove it from look buffer event list.
2N/A */
2N/A _t_free_looklist_head(tiptr);
2N/A _T_TX_NEXTSTATE(T_RCVREL, tiptr,
2N/A "t_rcv: invalid state event T_RCVREL");
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (0);
2N/A } else {
2N/A if (retval != T_ORDREL) {
2N/A t_errno = TNOREL;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A }
2N/A
2N/A /*
2N/A * get ordrel 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 have verified above that an orderly release event
2N/A * is pending on this endpoint, we assume that this getmsg()
2N/A * cannot block forever.
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
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 /* LINTED pointer cast */
2N/A pptr = (union T_primitives *)ctlbuf.buf;
2N/A
2N/A if (ctlbuf.len < (int)sizeof (struct T_ordrel_ind)) {
2N/A t_errno = TSYSERR;
2N/A errno = EPROTO;
2N/A goto err_out;
2N/A }
2N/A if (pptr->type != T_ORDREL_IND) {
2N/A if (pptr->type == T_DISCON_IND) {
2N/A /*
2N/A * T_DISCON_IND gets priority following
2N/A * TPI design philosphy.
2N/A *
2N/A * Add it to the events in the "look buffer"
2N/A * list of events. This routine may defer signals.
2N/A */
2N/A if (_t_register_lookevent(tiptr, databuf.buf,
2N/A databuf.len, ctlbuf.buf,
2N/A ctlbuf.len) < 0) {
2N/A t_errno = TSYSERR;
2N/A errno = ENOMEM;
2N/A goto err_out;
2N/A }
2N/A t_errno = TLOOK;
2N/A goto err_out;
2N/A } else {
2N/A t_errno = TSYSERR;
2N/A errno = EPROTO;
2N/A goto err_out;
2N/A }
2N/A }
2N/A
2N/A _T_TX_NEXTSTATE(T_RCVREL, tiptr,
2N/A "t_rcvrel: invalid state event T_RCVREL");
2N/A
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 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 (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 sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
2N/A}