usr/src/lib/libc/port/nsl/t_getinfo.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  24 /*        All Rights Reserved   */
  25
  26 /*
  27  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.5 */
  32
  33 #include "mt.h"
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <strings.h>
  37 #include <unistd.h>
  38 #include <errno.h>
  39 #include <stropts.h>
  40 #include <sys/stream.h>
  41 #define _SUN_TPI_VERSION 2
  42 #include <sys/tihdr.h>
  43 #include <sys/timod.h>
  44 #include <sys/stat.h>
  45 #include <xti.h>
  46 #include <fcntl.h>
  47 #include <signal.h>
  48 #include <assert.h>
  49 #include <syslog.h>
  50 #include <limits.h>
  51 #include "tx.h"
  52
  53 int
  54 _tx_getinfo(int fd, struct t_info *info, int api_semantics)
  55 {
  56         struct T_info_req *inforeqp;
  57         struct T_info_ack *infoackp;
  58         int retlen;
  59         struct _ti_user *tiptr;
  60         int retval, sv_errno, didalloc;
  61         struct strbuf ctlbuf;
  62
  63         if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
  64                 return (-1);
  65         sig_mutex_lock(&tiptr->ti_lock);
  66
  67         /*
  68          * Acquire buffer for use in sending/receiving the message.
  69          * Note: assumes (correctly) that ti_ctlsize is large enough
  70          * to hold sizeof (struct T_info_req/ack)
  71          */
  72         if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
  73                 sv_errno = errno;
  74                 sig_mutex_unlock(&tiptr->ti_lock);
  75                 errno = sv_errno;
  76                 return (-1);
  77         }
  78
  79         /* LINTED pointer cast */
  80         inforeqp =  (struct T_info_req *)ctlbuf.buf;
  81         inforeqp->PRIM_type = T_INFO_REQ;
  82
  83         do {
  84                 retval = _t_do_ioctl(fd, ctlbuf.buf,
  85                         (int)sizeof (struct T_info_req), TI_GETINFO, &retlen);
  86         } while (retval < 0 && errno == EINTR);
  87
  88         if (retval < 0)
  89                 goto err_out;
  90
  91         if (retlen != (int)sizeof (struct T_info_ack)) {
  92                 t_errno = TSYSERR;
  93                 errno = EIO;
  94                 goto err_out;
  95         }
  96
  97         /* LINTED pointer cast */
  98         infoackp = (struct T_info_ack *)ctlbuf.buf;
  99
 100         info->addr = infoackp->ADDR_size;
 101         info->options = infoackp->OPT_size;
 102         info->tsdu = infoackp->TSDU_size;
 103         info->etsdu = infoackp->ETSDU_size;
 104         info->connect = infoackp->CDATA_size;
 105         info->discon = infoackp->DDATA_size;
 106         info->servtype = infoackp->SERV_type;
 107
 108         if (_T_IS_XTI(api_semantics)) {
 109                 /* XTI ONLY - TLI t_info struct does not have "flags" */
 110                 info->flags = 0;
 111                 if (infoackp->PROVIDER_flag & (SENDZERO|OLD_SENDZERO))
 112                         info->flags |= T_SENDZERO;
 113         }
 114         if (didalloc)
 115                 free(ctlbuf.buf);
 116         else
 117                 tiptr->ti_ctlbuf = ctlbuf.buf;
 118         sig_mutex_unlock(&tiptr->ti_lock);
 119         return (0);
 120
 121 err_out:
 122         sv_errno = errno;
 123         if (didalloc)
 124                 free(ctlbuf.buf);
 125         else
 126                 tiptr->ti_ctlbuf = ctlbuf.buf;
 127         sig_mutex_unlock(&tiptr->ti_lock);
 128         errno = sv_errno;
 129         return (-1);
 130 }