usr/src/uts/common/ktli/t_kgtstate.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 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*
  43  * Kernel TLI-like function to get the state of an
  44  * endpoint.
  45  *
  46  * Returns:
  47  *      0 on success and "state" is set to the current state,
  48  *      or a positive error code.
  49  */
  50
  51 #include <sys/param.h>
  52 #include <sys/types.h>
  53 #include <sys/proc.h>
  54 #include <sys/file.h>
  55 #include <sys/user.h>
  56 #include <sys/vnode.h>
  57 #include <sys/errno.h>
  58 #include <sys/stream.h>
  59 #include <sys/ioctl.h>
  60 #include <sys/stropts.h>
  61 #include <sys/strsubr.h>
  62 #include <sys/tihdr.h>
  63 #include <sys/timod.h>
  64 #include <sys/tiuser.h>
  65 #include <sys/t_kuser.h>
  66
  67
  68 int
  69 t_kgetstate(TIUSER *tiptr, int *state)
  70 {
  71         struct T_info_ack       inforeq;
  72         struct strioctl         strioc;
  73         int                     retval;
  74         vnode_t                 *vp;
  75         file_t                  *fp;
  76         int                     error;
  77
  78         error = 0;
  79         retval = 0;
  80         fp = tiptr->fp;
  81         vp = fp->f_vnode;
  82
  83         if (state == NULL)
  84                 return (EINVAL);
  85
  86         inforeq.PRIM_type = T_INFO_REQ;
  87         strioc.ic_cmd = TI_GETINFO;
  88         strioc.ic_timout = 0;
  89         strioc.ic_dp = (char *)&inforeq;
  90         strioc.ic_len = (int)sizeof (struct T_info_req);
  91
  92         error = strdoioctl(vp->v_stream, &strioc, FNATIVE, K_TO_K, CRED(),
  93             &retval);
  94         if (error)
  95                 return (error);
  96
  97         if (retval) {
  98                 if ((retval & 0xff) == TSYSERR)
  99                         error = (retval >> 8) & 0xff;
 100                 else
 101                         error = t_tlitosyserr(retval & 0xff);
 102                 return (error);
 103         }
 104
 105         if (strioc.ic_len != sizeof (struct T_info_ack))
 106                 return (EPROTO);
 107
 108         switch (inforeq.CURRENT_state) {
 109         case TS_UNBND:
 110                 *state = T_UNBND;
 111                 break;
 112
 113         case TS_IDLE:
 114                 *state = T_IDLE;
 115                 break;
 116
 117         case TS_WRES_CIND:
 118                 *state = T_INCON;
 119                 break;
 120
 121         case TS_WCON_CREQ:
 122                 *state = T_OUTCON;
 123                 break;
 124
 125         case TS_DATA_XFER:
 126                 *state = T_DATAXFER;
 127                 break;
 128
 129         case TS_WIND_ORDREL:
 130                 *state = T_OUTREL;
 131                 break;
 132
 133         case TS_WREQ_ORDREL:
 134                 *state = T_INREL;
 135                 break;
 136
 137         default:
 138                 error = EPROTO;
 139                 break;
 140         }
 141         return (error);
 142 }