usr/src/lib/libc/port/nsl/t_getname.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 2006 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #include "mt.h"
  34 #include <stdlib.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #include <string.h>
  38 #include <stropts.h>
  39 #include <sys/stream.h>
  40 #include <xti.h>
  41 #define _SUN_TPI_VERSION 2
  42 #include <sys/tihdr.h>
  43 #include <sys/timod.h>
  44 #include <assert.h>
  45 #include <signal.h>
  46 #include "tx.h"
  47
  48 static int __tx_tlitpi_getprotaddr_locked(struct _ti_user *tiptr,
  49         struct t_bind *boundaddr, struct t_bind *peer);
  50
  51
  52 static int __tx_getname_locked(int fd, struct netbuf *name, int type);
  53
  54 int
  55 _tx_getname(int fd, struct netbuf *name, int type, int api_semantics)
  56 {
  57         struct _ti_user *tiptr;
  58         int retval, sv_errno;
  59
  60         assert(_T_IS_TLI(api_semantics)); /* TLI only interface */
  61         if (!name || ((type != LOCALNAME) && (type != REMOTENAME))) {
  62                 errno = EINVAL;
  63                 return (-1);
  64         }
  65
  66         if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
  67                 return (-1);
  68         sig_mutex_lock(&tiptr->ti_lock);
  69
  70         retval = __tx_getname_locked(fd, name, type);
  71
  72         if (retval < 0) {
  73                 sv_errno = errno;
  74                 sig_mutex_unlock(&tiptr->ti_lock);
  75                 errno = sv_errno;
  76                 return (-1);
  77         }
  78
  79         sig_mutex_unlock(&tiptr->ti_lock);
  80
  81         return (0);
  82 }
  83
  84
  85 static int
  86 __tx_getname_locked(int fd, struct netbuf *name, int type)
  87 {
  88         int retval;
  89
  90         do {
  91                 retval = ioctl(fd,
  92                     (type == LOCALNAME) ? TI_GETMYNAME : TI_GETPEERNAME, name);
  93         } while (retval < 0 && errno == EINTR);
  94
  95         if (retval < 0) {
  96                 t_errno = TSYSERR;
  97                 return (-1);
  98         }
  99         return (0);
 100 }
 101
 102
 103
 104 int
 105 _tx_getprotaddr(
 106         int fd,
 107         struct t_bind *boundaddr,
 108         struct t_bind *peeraddr,
 109         int api_semantics)
 110 {
 111         struct _ti_user *tiptr;
 112         int retval, sv_errno;
 113         struct T_addr_req *addreqp;
 114         struct T_addr_ack *addrackp;
 115         int didalloc;
 116         struct strbuf ctlbuf;
 117         int retlen;
 118
 119         if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
 120                 return (-1);
 121
 122         sig_mutex_lock(&tiptr->ti_lock);
 123
 124         if ((tiptr->ti_prov_flag & XPG4_1) == 0) {
 125                 /*
 126                  * Provider does not support XTI inspired TPI so we
 127                  * try to do operation assuming TLI inspired TPI
 128                  */
 129                 retval = __tx_tlitpi_getprotaddr_locked(tiptr, boundaddr,
 130                         peeraddr);
 131                 sv_errno = errno;
 132                 sig_mutex_unlock(&tiptr->ti_lock);
 133                 errno = sv_errno;
 134                 return (retval);
 135         }
 136
 137         /*
 138          * Acquire buffer for use in sending/receiving the message.
 139          * Note: assumes (correctly) that ti_ctlsize is large enough
 140          * to hold sizeof (struct T_addr_req/ack)
 141          */
 142         if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
 143                 sv_errno = errno;
 144                 sig_mutex_unlock(&tiptr->ti_lock);
 145                 errno = sv_errno;
 146                 return (-1);
 147         }
 148
 149         /* LINTED pointer cast */
 150         addreqp = (struct T_addr_req *)ctlbuf.buf;
 151         addreqp->PRIM_type = T_ADDR_REQ;
 152
 153         do {
 154                 retval = _t_do_ioctl(fd, ctlbuf.buf,
 155                         (int)sizeof (struct T_addr_req), TI_GETADDRS, &retlen);
 156         } while (retval < 0 && errno == EINTR);
 157
 158         /* retval can now be either 0 or -1 */
 159         if (retval < 0) {
 160                 sv_errno = errno;
 161                 sig_mutex_unlock(&tiptr->ti_lock);
 162                 errno = sv_errno;
 163                 goto err_out;
 164         }
 165         sig_mutex_unlock(&tiptr->ti_lock);
 166
 167         if (retlen < (int)sizeof (struct T_addr_ack)) {
 168                 t_errno = TSYSERR;
 169                 errno = EIO;
 170                 retval = -1;
 171                 goto err_out;
 172         }
 173
 174         /* LINTED pointer cast */
 175         addrackp = (struct T_addr_ack *)ctlbuf.buf;
 176
 177         /*
 178          * We assume null parameters are OK and not errors
 179          */
 180         if (boundaddr != NULL && boundaddr->addr.maxlen > 0) {
 181                 if (TLEN_GT_NLEN(addrackp->LOCADDR_length,
 182                     boundaddr->addr.maxlen)) {
 183                         t_errno = TBUFOVFLW;
 184                         retval = -1;
 185                         goto err_out;
 186                 }
 187                 boundaddr->addr.len = addrackp->LOCADDR_length;
 188                 (void) memcpy(boundaddr->addr.buf,
 189                     ctlbuf.buf + addrackp->LOCADDR_offset,
 190                     (size_t)addrackp->LOCADDR_length);
 191         }
 192
 193         /*
 194          * Note: In states where there is no remote end of the connection
 195          * the T_ADDR_REQ primitive does not return a remote address. However,
 196          * in protcols such as TCP, the transport connection is established
 197          * before the TLI/XTI level association is established. Therefore,
 198          * in state T_OUTCON, the transport may return a remote address where
 199          * TLI/XTI level thinks there is no remote end and therefore
 200          * no remote address should be returned. We therefore do not look at
 201          * address returned by transport provider in T_OUTCON state.
 202          * Tested by XTI test suite.
 203          */
 204         if (tiptr->ti_state != T_OUTCON &&
 205             peeraddr != NULL && peeraddr->addr.maxlen > 0) {
 206                 if (TLEN_GT_NLEN(addrackp->REMADDR_length,
 207                     peeraddr->addr.maxlen)) {
 208                         t_errno = TBUFOVFLW;
 209                         retval = -1;
 210                         goto err_out;
 211                 }
 212                 peeraddr->addr.len = addrackp->REMADDR_length;
 213                 (void) memcpy(peeraddr->addr.buf,
 214                     ctlbuf.buf + addrackp->REMADDR_offset,
 215                     (size_t)addrackp->REMADDR_length);
 216         }
 217
 218 err_out:
 219         if (didalloc)
 220                 free(ctlbuf.buf);
 221         else
 222                 tiptr->ti_ctlbuf = ctlbuf.buf;
 223         return (retval);
 224 }
 225
 226 static int
 227 __tx_tlitpi_getprotaddr_locked(
 228         struct _ti_user *tiptr,
 229         struct t_bind *boundaddr,
 230         struct t_bind *peeraddr)
 231 {
 232         if (boundaddr) {
 233                 boundaddr->addr.len = 0;
 234                 if (tiptr->ti_state >= TS_IDLE) {
 235                         /*
 236                          * assume bound endpoint .
 237                          * Note: TI_GETMYNAME can return
 238                          * a finite length all zeroes address for unbound
 239                          * endpoint so we avoid relying on it for bound
 240                          * endpoints for XTI t_getprotaddr() semantics.
 241                          */
 242                         if (__tx_getname_locked(tiptr->ti_fd, &boundaddr->addr,
 243                             LOCALNAME) < 0)
 244                                 return (-1);
 245
 246                 }
 247         }
 248         if (peeraddr) {
 249
 250                 peeraddr->addr.len = 0;
 251
 252                 if (tiptr->ti_state >= TS_DATA_XFER) {
 253                         /*
 254                          * assume connected endpoint.
 255                          * The TI_GETPEERNAME call can fail with error
 256                          * if endpoint is not connected so we don't call it
 257                          * for XTI t_getprotaddr() semantics
 258                          */
 259                         if (__tx_getname_locked(tiptr->ti_fd, &peeraddr->addr,
 260                             REMOTENAME) < 0)
 261                                 return (-1);
 262                 }
 263         }
 264         return (0);
 265 }