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 1.5 */
2N/A
2N/A#include "mt.h"
2N/A#include <errno.h>
2N/A#include <stdlib.h>
2N/A#include <string.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 <syslog.h>
2N/A#include "tx.h"
2N/A
2N/Aint
2N/A_tx_listen(int fd, struct t_call *call, 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 int flg = 0;
2N/A
2N/A if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
2N/A return (-1);
2N/A
2N/A sig_mutex_lock(&tiptr->ti_lock);
2N/A
2N/A if (tiptr->ti_servtype == T_CLTS) {
2N/A sv_errno = errno;
2N/A t_errno = TNOTSUPPORT;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
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_IDLE ||
2N/A tiptr->ti_state == T_INCON)) {
2N/A t_errno = TOUTSTATE;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A
2N/A if (tiptr->ti_qlen == 0) {
2N/A t_errno = TBADQLEN;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A
2N/A if (tiptr->ti_ocnt == tiptr->ti_qlen) {
2N/A if (!(tiptr->ti_flags & TX_TQFULL_NOTIFIED)) {
2N/A tiptr->ti_flags |= TX_TQFULL_NOTIFIED;
2N/A t_errno = TQFULL;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A }
2N/A
2N/A }
2N/A
2N/A /*
2N/A * check if something in look buffer
2N/A */
2N/A if (tiptr->ti_lookcnt > 0) {
2N/A t_errno = TLOOK;
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A return (-1);
2N/A }
2N/A
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 * Acquire databuf for use in sending/receiving data part
2N/A */
2N/A if (_t_acquire_databuf(tiptr, &databuf, &didralloc) < 0) {
2N/A int 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 sig_mutex_unlock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A return (-1);
2N/A }
2N/A
2N/A /*
2N/A * This is a call that may block indefinitely so we drop the
2N/A * lock and allow signals in MT case here and reacquire it.
2N/A * Error case should roll back state changes done above
2N/A * (happens to be no state change here)
2N/A */
2N/A sig_mutex_unlock(&tiptr->ti_lock);
2N/A if ((retval = getmsg(fd, &ctlbuf, &databuf, &flg)) < 0) {
2N/A if (errno == EAGAIN)
2N/A t_errno = TNODATA;
2N/A else
2N/A t_errno = TSYSERR;
2N/A sv_errno = errno;
2N/A sig_mutex_lock(&tiptr->ti_lock);
2N/A errno = sv_errno;
2N/A goto err_out;
2N/A }
2N/A sig_mutex_lock(&tiptr->ti_lock);
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 * is ctl part large enough to determine type
2N/A */
2N/A if (ctlbuf.len < (int)sizeof (t_scalar_t)) {
2N/A t_errno = TSYSERR;
2N/A errno = EPROTO;
2N/A goto err_out;
2N/A }
2N/A
2N/A /* LINTED pointer cast */
2N/A pptr = (union T_primitives *)ctlbuf.buf;
2N/A
2N/A switch (pptr->type) {
2N/A
2N/A case T_CONN_IND:
2N/A if ((ctlbuf.len < (int)sizeof (struct T_conn_ind)) ||
2N/A (ctlbuf.len < (int)(pptr->conn_ind.OPT_length
2N/A + pptr->conn_ind.OPT_offset))) {
2N/A t_errno = TSYSERR;
2N/A errno = EPROTO;
2N/A goto err_out;
2N/A }
2N/A /*
2N/A * Change state and increment outstanding connection
2N/A * indication count and instantiate "sequence" return
2N/A * parameter.
2N/A * Note: It is correct semantics accoring to spec to
2N/A * do this despite possibility of TBUFOVFLW error later.
2N/A * The spec treats TBUFOVFLW error in general as a special case
2N/A * which can be ignored by applications that do not
2N/A * really need the stuff returned in 'netbuf' structures.
2N/A */
2N/A _T_TX_NEXTSTATE(T_LISTN, tiptr,
2N/A "t_listen:invalid state event T_LISTN");
2N/A tiptr->ti_ocnt++;
2N/A call->sequence = pptr->conn_ind.SEQ_number;
2N/A
2N/A if (_T_IS_TLI(api_semantics) || call->addr.maxlen > 0) {
2N/A if (TLEN_GT_NLEN(pptr->conn_ind.SRC_length,
2N/A call->addr.maxlen)) {
2N/A t_errno = TBUFOVFLW;
2N/A goto err_out;
2N/A }
2N/A (void) memcpy(call->addr.buf, ctlbuf.buf +
2N/A (size_t)pptr->conn_ind.SRC_offset,
2N/A (unsigned int)pptr->conn_ind.SRC_length);
2N/A call->addr.len = pptr->conn_ind.SRC_length;
2N/A }
2N/A if (_T_IS_TLI(api_semantics) || call->opt.maxlen > 0) {
2N/A if (TLEN_GT_NLEN(pptr->conn_ind.OPT_length,
2N/A call->opt.maxlen)) {
2N/A t_errno = TBUFOVFLW;
2N/A goto err_out;
2N/A }
2N/A (void) memcpy(call->opt.buf, ctlbuf.buf +
2N/A pptr->conn_ind.OPT_offset,
2N/A (size_t)pptr->conn_ind.OPT_length);
2N/A call->opt.len = pptr->conn_ind.OPT_length;
2N/A }
2N/A if (_T_IS_TLI(api_semantics) || call->udata.maxlen > 0) {
2N/A if (databuf.len > (int)call->udata.maxlen) {
2N/A t_errno = TBUFOVFLW;
2N/A goto err_out;
2N/A }
2N/A (void) memcpy(call->udata.buf, databuf.buf,
2N/A (size_t)databuf.len);
2N/A call->udata.len = databuf.len;
2N/A }
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/A case T_DISCON_IND:
2N/A /*
2N/A * Append 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
2N/A default:
2N/A break;
2N/A }
2N/A
2N/A t_errno = TSYSERR;
2N/A errno = EPROTO;
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}