/*
* 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"
#include "mt.h"
#include <sys/param.h>
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#include <stdlib.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 <assert.h>
#include "tx.h"
/*
* Snd_conn_req - send connect request message to transport provider.
* All signals for the caller are blocked during the call to simplify design.
* (This is OK for a bounded amount of time this routine is expected to
* execute). Also, assumes tiptr->ti_lock is held.
*/
int
_t_snd_conn_req(
struct _ti_user *tiptr,
const struct t_call *call,
struct strbuf *ctlbufp)
{
struct T_conn_req *creq;
int size;
int fd;
assert(MUTEX_HELD(&tiptr->ti_lock));
fd = tiptr->ti_fd;
if (tiptr->ti_servtype == T_CLTS) {
t_errno = TNOTSUPPORT;
return (-1);
}
if (_t_is_event(fd, tiptr) < 0)
return (-1);
/* LINTED pointer cast */
creq = (struct T_conn_req *)ctlbufp->buf;
creq->PRIM_type = T_CONN_REQ;
creq->DEST_length = call->addr.len;
creq->DEST_offset = 0;
creq->OPT_length = call->opt.len;
creq->OPT_offset = 0;
size = (int)sizeof (struct T_conn_req); /* size without any buffers */
if (call->addr.len) {
if (_t_aligned_copy(ctlbufp, call->addr.len, size,
call->addr.buf, &creq->DEST_offset) < 0) {
/*
* Aligned copy will overflow buffer allocated based
* based on transport maximum address size.
* return error.
*/
t_errno = TBADADDR;
return (-1);
}
size = creq->DEST_offset + creq->DEST_length;
}
if (call->opt.len) {
if (_t_aligned_copy(ctlbufp, call->opt.len, size,
call->opt.buf, &creq->OPT_offset) < 0) {
/*
* Aligned copy will overflow buffer allocated based
* on maximum option size in transport.
* return error.
*/
t_errno = TBADOPT;
return (-1);
}
size = creq->OPT_offset + creq->OPT_length;
}
if (call->udata.len) {
if ((tiptr->ti_cdatasize == T_INVALID /* -2 */) ||
((tiptr->ti_cdatasize != T_INFINITE /* -1 */) &&
(call->udata.len > (uint32_t)tiptr->ti_cdatasize))) {
/*
* user data not valid with connect or it
* exceeds the limits specified by the transport
* provider.
*/
t_errno = TBADDATA;
return (-1);
}
}
ctlbufp->len = size;
/*
* Assumes signals are blocked so putmsg() will not block
* indefinitely
*/
if (putmsg(fd, ctlbufp,
(struct strbuf *)(call->udata.len? &call->udata: NULL), 0) < 0) {
t_errno = TSYSERR;
return (-1);
}
if (_t_is_ok(fd, tiptr, T_CONN_REQ) < 0)
return (-1);
return (0);
}
/*
* Rcv_conn_con - get connection confirmation off
* of read queue
* Note:
* - called holding the tiptr->ti_lock
*/
int
_t_rcv_conn_con(
struct _ti_user *tiptr,
struct t_call *call,
struct strbuf *ctlbufp,
int api_semantics)
{
struct strbuf databuf;
union T_primitives *pptr;
int retval, fd, sv_errno;
int didralloc;
int flg = 0;
fd = tiptr->ti_fd;
if (tiptr->ti_servtype == T_CLTS) {
t_errno = TNOTSUPPORT;
return (-1);
}
/*
* see if there is something in look buffer
*/
if (tiptr->ti_lookcnt > 0) {
t_errno = TLOOK;
return (-1);
}
ctlbufp->len = 0;
/*
* Acquire databuf for use in sending/receiving data part
*/
if (_t_acquire_databuf(tiptr, &databuf, &didralloc) < 0)
return (-1);
/*
* This is a call that may block indefinitely so we drop the
* lock and allow signals in MT case here and reacquire it.
* Error case should roll back state changes done above
* (happens to be no state change here)
*/
sig_mutex_unlock(&tiptr->ti_lock);
if ((retval = getmsg(fd, ctlbufp, &databuf, &flg)) < 0) {
sv_errno = errno;
if (errno == EAGAIN)
t_errno = TNODATA;
else
t_errno = TSYSERR;
sig_mutex_lock(&tiptr->ti_lock);
errno = sv_errno;
goto err_out;
}
sig_mutex_lock(&tiptr->ti_lock);
if (databuf.len == -1) databuf.len = 0;
/*
* did we get entire message
*/
if (retval > 0) {
t_errno = TSYSERR;
errno = EIO;
goto err_out;
}
/*
* is cntl part large enough to determine message type?
*/
if (ctlbufp->len < (int)sizeof (t_scalar_t)) {
t_errno = TSYSERR;
errno = EPROTO;
goto err_out;
}
/* LINTED pointer cast */
pptr = (union T_primitives *)ctlbufp->buf;
switch (pptr->type) {
case T_CONN_CON:
if ((ctlbufp->len < (int)sizeof (struct T_conn_con)) ||
(pptr->conn_con.OPT_length != 0 &&
(ctlbufp->len < (int)(pptr->conn_con.OPT_length +
pptr->conn_con.OPT_offset)))) {
t_errno = TSYSERR;
errno = EPROTO;
goto err_out;
}
if (call != NULL) {
/*
* Note: Buffer overflow is an error in XTI
* only if netbuf.maxlen > 0
*/
if (_T_IS_TLI(api_semantics) || call->addr.maxlen > 0) {
if (TLEN_GT_NLEN(pptr->conn_con.RES_length,
call->addr.maxlen)) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(call->addr.buf,
ctlbufp->buf + pptr->conn_con.RES_offset,
(size_t)pptr->conn_con.RES_length);
call->addr.len = pptr->conn_con.RES_length;
}
if (_T_IS_TLI(api_semantics) || call->opt.maxlen > 0) {
if (TLEN_GT_NLEN(pptr->conn_con.OPT_length,
call->opt.maxlen)) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(call->opt.buf,
ctlbufp->buf + pptr->conn_con.OPT_offset,
(size_t)pptr->conn_con.OPT_length);
call->opt.len = pptr->conn_con.OPT_length;
}
if (_T_IS_TLI(api_semantics) ||
call->udata.maxlen > 0) {
if (databuf.len > (int)call->udata.maxlen) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(call->udata.buf, databuf.buf,
(size_t)databuf.len);
call->udata.len = databuf.len;
}
/*
* since a confirmation seq number
* is -1 by default
*/
call->sequence = (int)-1;
}
if (didralloc)
free(databuf.buf);
else
tiptr->ti_rcvbuf = databuf.buf;
return (0);
case T_DISCON_IND:
/*
* if disconnect indication then append it to
* the "look bufffer" list.
* This may result in MT case for the process
* signal mask to be temporarily masked to
* ensure safe memory allocation.
*/
if (_t_register_lookevent(tiptr, databuf.buf, databuf.len,
ctlbufp->buf, ctlbufp->len) < 0) {
t_errno = TSYSERR;
errno = ENOMEM;
goto err_out;
}
t_errno = TLOOK;
goto err_out;
default:
break;
}
t_errno = TSYSERR;
errno = EPROTO;
err_out:
if (didralloc)
free(databuf.buf);
else
tiptr->ti_rcvbuf = databuf.buf;
return (-1);
}