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/*
* 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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.7.3.1 */
/*
* t_rcvrel.c and t_rcvreldata.c are very similar and contain common code.
* Any changes to either of them should be reviewed to see whether they
* are applicable to the other file.
*/
#include "mt.h"
#include <stdlib.h>
#include <errno.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_rcvrel(int fd, int api_semantics)
{
struct strbuf ctlbuf;
struct strbuf databuf;
int retval;
union T_primitives *pptr;
struct _ti_user *tiptr;
int sv_errno;
int didalloc, didralloc;
int flg = 0;
if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
return (-1);
sig_mutex_lock(&tiptr->ti_lock);
if (tiptr->ti_servtype != T_COTS_ORD) {
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
*/
if (!(tiptr->ti_state == T_DATAXFER ||
tiptr->ti_state == T_OUTREL)) {
t_errno = TOUTSTATE;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
}
if ((retval = _t_look_locked(fd, tiptr, 0, api_semantics)) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
if (retval == T_DISCONNECT) {
/*
* This ensures preference to T_DISCON_IND which is
* the design model for TPI
*/
t_errno = TLOOK;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
if ((tiptr->ti_lookcnt > 0) &&
/* LINTED pointer cast */
(*((t_scalar_t *)tiptr->ti_lookbufs.tl_lookcbuf) == T_ORDREL_IND)) {
/*
* Current look buffer event is T_ORDREL_IND.
* Remove it from look buffer event list.
*/
_t_free_looklist_head(tiptr);
_T_TX_NEXTSTATE(T_RCVREL, tiptr,
"t_rcv: invalid state event T_RCVREL");
sig_mutex_unlock(&tiptr->ti_lock);
return (0);
} else {
if (retval != T_ORDREL) {
t_errno = TNOREL;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
}
/*
* get ordrel off read queue.
* use ctl and rcv buffers
*
* Acquire ctlbuf for use in sending/receiving control part
* of the message.
*/
if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
/*
* Acquire databuf for use in sending/receiving data part
*/
if (_t_acquire_databuf(tiptr, &databuf, &didralloc) < 0) {
sv_errno = errno;
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
/*
* Since we have verified above that an orderly release event
* is pending on this endpoint, we assume that this getmsg()
* cannot block forever.
*/
do {
retval = getmsg(fd, &ctlbuf, &databuf, &flg);
} while (retval < 0 && errno == EINTR);
if (retval < 0) {
t_errno = TSYSERR;
goto err_out;
}
/*
* did I get entire message?
*/
if (retval > 0) {
t_errno = TSYSERR;
errno = EIO;
goto err_out;
}
/* LINTED pointer cast */
pptr = (union T_primitives *)ctlbuf.buf;
if (ctlbuf.len < (int)sizeof (struct T_ordrel_ind)) {
t_errno = TSYSERR;
errno = EPROTO;
goto err_out;
}
if (pptr->type != T_ORDREL_IND) {
if (pptr->type == T_DISCON_IND) {
/*
* T_DISCON_IND gets priority following
* TPI design philosphy.
*
* Add it to the events in the "look buffer"
* list of events. This routine may defer signals.
*/
if (_t_register_lookevent(tiptr, databuf.buf,
databuf.len, ctlbuf.buf,
ctlbuf.len) < 0) {
t_errno = TSYSERR;
errno = ENOMEM;
goto err_out;
}
t_errno = TLOOK;
goto err_out;
} else {
t_errno = TSYSERR;
errno = EPROTO;
goto err_out;
}
}
_T_TX_NEXTSTATE(T_RCVREL, tiptr,
"t_rcvrel: invalid state event T_RCVREL");
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
if (didralloc)
free(databuf.buf);
else
tiptr->ti_rcvbuf = databuf.buf;
sig_mutex_unlock(&tiptr->ti_lock);
return (0);
err_out:
sv_errno = errno;
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
if (didralloc)
free(databuf.buf);
else
tiptr->ti_rcvbuf = databuf.buf;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
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