/*
 * 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.
 */

#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);
}