t_bind.c revision 61961e0f20c7637a3846bb39786bb9dffa91dfb9
/*
* 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 1.3.4.1 */
#include "mt.h"
#include <stdlib.h>
#include <errno.h>
#include <string.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_bind(
int fd,
const struct t_bind *req,
struct t_bind *ret,
int api_semantics
)
{
struct T_bind_req *bind_reqp;
struct T_bind_ack *bind_ackp;
int size, sv_errno, retlen;
struct _ti_user *tiptr;
sigset_t mask;
int didalloc;
int use_xpg41tpi;
struct strbuf ctlbuf;
if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
return (-1);
/*
* We block all signals since TI_BIND, which sends a TPI message
* O_T_BIND_REQ down, is not an idempotetent operation
* Note that sig_mutex_lock() only defers signals, it does not
* block them, so interruptible syscalls could still get EINTR.
*/
(void) thr_sigsetmask(SIG_SETMASK, &fillset, &mask);
sig_mutex_lock(&tiptr->ti_lock);
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_UNBND) {
t_errno = TOUTSTATE;
sig_mutex_unlock(&tiptr->ti_lock);
(void) thr_sigsetmask(SIG_SETMASK, &mask, NULL);
return (-1);
}
}
/*
* Acquire buffer for use in sending/receiving the message.
* Note: assumes (correctly) that ti_ctlsize is large enough
* to hold sizeof (struct T_bind_req/ack)
*/
if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
(void) thr_sigsetmask(SIG_SETMASK, &mask, NULL);
errno = sv_errno;
return (-1);
}
/* LINTED pointer cast */
bind_reqp = (struct T_bind_req *)ctlbuf.buf;
size = (int)sizeof (struct T_bind_req);
use_xpg41tpi = (_T_IS_XTI(api_semantics)) &&
((tiptr->ti_prov_flag & XPG4_1) != 0);
if (use_xpg41tpi)
/* XTI call and provider knows the XTI inspired TPI */
bind_reqp->PRIM_type = T_BIND_REQ;
else
/* TLI caller old TPI provider */
bind_reqp->PRIM_type = O_T_BIND_REQ;
bind_reqp->ADDR_length = (req == NULL? 0: req->addr.len);
bind_reqp->ADDR_offset = 0;
bind_reqp->CONIND_number = (req == NULL? 0: req->qlen);
if (bind_reqp->ADDR_length) {
if (_t_aligned_copy(&ctlbuf, (int)bind_reqp->ADDR_length, size,
req->addr.buf, &bind_reqp->ADDR_offset) < 0) {
/*
* Aligned copy will overflow buffer allocated based
* on transport maximum address length.
* return error.
*/
t_errno = TBADADDR;
goto err_out;
}
size = bind_reqp->ADDR_offset + bind_reqp->ADDR_length;
}
if (_t_do_ioctl(fd, ctlbuf.buf, size, TI_BIND, &retlen) < 0) {
goto err_out;
}
if (retlen < (int)sizeof (struct T_bind_ack)) {
t_errno = TSYSERR;
errno = EIO;
goto err_out;
}
/* LINTED pointer cast */
bind_ackp = (struct T_bind_ack *)ctlbuf.buf;
if ((req != NULL) && req->addr.len != 0 &&
(use_xpg41tpi == 0) && (_T_IS_XTI(api_semantics))) {
/*
* Best effort to do XTI on old TPI.
*
* Match address requested or unbind and fail with
* TADDRBUSY.
*
* XXX - Hack alert ! Should we do this at all ?
* Not "supported" as may not work if encoding of
* address is different in the returned address. This
* will also have trouble with TCP/UDP wildcard port
* requests
*/
if ((req->addr.len != bind_ackp->ADDR_length) ||
(memcmp(req->addr.buf, ctlbuf.buf +
bind_ackp->ADDR_offset, req->addr.len) != 0)) {
(void) _tx_unbind_locked(fd, tiptr, &ctlbuf);
t_errno = TADDRBUSY;
goto err_out;
}
}
tiptr->ti_ocnt = 0;
tiptr->ti_flags &= ~TX_TQFULL_NOTIFIED;
_T_TX_NEXTSTATE(T_BIND, tiptr, "t_bind: invalid state event T_BIND");
if (ret != NULL) {
if (_T_IS_TLI(api_semantics) || ret->addr.maxlen > 0) {
if (TLEN_GT_NLEN(bind_reqp->ADDR_length,
ret->addr.maxlen)) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(ret->addr.buf,
ctlbuf.buf + bind_ackp->ADDR_offset,
(size_t)bind_ackp->ADDR_length);
ret->addr.len = bind_ackp->ADDR_length;
}
ret->qlen = bind_ackp->CONIND_number;
}
tiptr->ti_qlen = (uint_t)bind_ackp->CONIND_number;
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
sig_mutex_unlock(&tiptr->ti_lock);
(void) thr_sigsetmask(SIG_SETMASK, &mask, NULL);
return (0);
/* NOTREACHED */
err_out:
sv_errno = errno;
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
sig_mutex_unlock(&tiptr->ti_lock);
(void) thr_sigsetmask(SIG_SETMASK, &mask, NULL);
errno = sv_errno;
return (-1);
}