17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 22*61961e0fSrobinson 237c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 247c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate /* 27*61961e0fSrobinson * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 287c478bd9Sstevel@tonic-gate * Use is subject to license terms. 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.5 */ 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate /* 347c478bd9Sstevel@tonic-gate * t_rcvudata.c and t_rcvvudata.c are very similar and contain common code. 357c478bd9Sstevel@tonic-gate * Any changes to either of them should be reviewed to see whether they 367c478bd9Sstevel@tonic-gate * are applicable to the other file. 377c478bd9Sstevel@tonic-gate */ 387c478bd9Sstevel@tonic-gate #include "mt.h" 397c478bd9Sstevel@tonic-gate #include <string.h> 407c478bd9Sstevel@tonic-gate #include <stdlib.h> 417c478bd9Sstevel@tonic-gate #include <errno.h> 427c478bd9Sstevel@tonic-gate #include <stropts.h> 437c478bd9Sstevel@tonic-gate #include <sys/stream.h> 447c478bd9Sstevel@tonic-gate #define _SUN_TPI_VERSION 2 457c478bd9Sstevel@tonic-gate #include <sys/tihdr.h> 467c478bd9Sstevel@tonic-gate #include <sys/timod.h> 477c478bd9Sstevel@tonic-gate #include <xti.h> 487c478bd9Sstevel@tonic-gate #include <syslog.h> 497c478bd9Sstevel@tonic-gate #include "tx.h" 507c478bd9Sstevel@tonic-gate 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate int 537c478bd9Sstevel@tonic-gate _tx_rcvudata( 547c478bd9Sstevel@tonic-gate int fd, 557c478bd9Sstevel@tonic-gate struct t_unitdata *unitdata, 567c478bd9Sstevel@tonic-gate int *flags, 577c478bd9Sstevel@tonic-gate int api_semantics 587c478bd9Sstevel@tonic-gate ) 597c478bd9Sstevel@tonic-gate { 607c478bd9Sstevel@tonic-gate struct strbuf ctlbuf; 617c478bd9Sstevel@tonic-gate int retval; 627c478bd9Sstevel@tonic-gate union T_primitives *pptr; 637c478bd9Sstevel@tonic-gate struct _ti_user *tiptr; 647c478bd9Sstevel@tonic-gate int sv_errno; 657c478bd9Sstevel@tonic-gate int didalloc; 667c478bd9Sstevel@tonic-gate int flg = 0; 677c478bd9Sstevel@tonic-gate 68*61961e0fSrobinson if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) 697c478bd9Sstevel@tonic-gate return (-1); 707c478bd9Sstevel@tonic-gate sig_mutex_lock(&tiptr->ti_lock); 717c478bd9Sstevel@tonic-gate 727c478bd9Sstevel@tonic-gate if (tiptr->ti_servtype != T_CLTS) { 737c478bd9Sstevel@tonic-gate t_errno = TNOTSUPPORT; 747c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 757c478bd9Sstevel@tonic-gate return (-1); 767c478bd9Sstevel@tonic-gate } 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate if (_T_IS_XTI(api_semantics)) { 797c478bd9Sstevel@tonic-gate /* 807c478bd9Sstevel@tonic-gate * User level state verification only done for XTI 817c478bd9Sstevel@tonic-gate * because doing for TLI may break existing applications 827c478bd9Sstevel@tonic-gate */ 837c478bd9Sstevel@tonic-gate if (tiptr->ti_state != T_IDLE) { 847c478bd9Sstevel@tonic-gate t_errno = TOUTSTATE; 857c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 867c478bd9Sstevel@tonic-gate return (-1); 877c478bd9Sstevel@tonic-gate } 887c478bd9Sstevel@tonic-gate } 897c478bd9Sstevel@tonic-gate 907c478bd9Sstevel@tonic-gate 917c478bd9Sstevel@tonic-gate /* 927c478bd9Sstevel@tonic-gate * check if there is something in look buffer 937c478bd9Sstevel@tonic-gate */ 947c478bd9Sstevel@tonic-gate if (tiptr->ti_lookcnt > 0) { 957c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 967c478bd9Sstevel@tonic-gate t_errno = TLOOK; 977c478bd9Sstevel@tonic-gate return (-1); 987c478bd9Sstevel@tonic-gate } 997c478bd9Sstevel@tonic-gate 1007c478bd9Sstevel@tonic-gate /* 1017c478bd9Sstevel@tonic-gate * Acquire ctlbuf for use in sending/receiving control part 1027c478bd9Sstevel@tonic-gate * of the message. 1037c478bd9Sstevel@tonic-gate */ 1047c478bd9Sstevel@tonic-gate if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 1057c478bd9Sstevel@tonic-gate sv_errno = errno; 1067c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 1077c478bd9Sstevel@tonic-gate errno = sv_errno; 1087c478bd9Sstevel@tonic-gate return (-1); 1097c478bd9Sstevel@tonic-gate } 1107c478bd9Sstevel@tonic-gate 1117c478bd9Sstevel@tonic-gate *flags = 0; 1127c478bd9Sstevel@tonic-gate 1137c478bd9Sstevel@tonic-gate /* 1147c478bd9Sstevel@tonic-gate * This is a call that may block indefinitely so we drop the 1157c478bd9Sstevel@tonic-gate * lock and allow signals in MT case here and reacquire it. 1167c478bd9Sstevel@tonic-gate * Error case should roll back state changes done above 1177c478bd9Sstevel@tonic-gate * (happens to be no state change here) 1187c478bd9Sstevel@tonic-gate */ 1197c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 1207c478bd9Sstevel@tonic-gate if ((retval = getmsg(fd, &ctlbuf, (struct strbuf *)&unitdata->udata, 1217c478bd9Sstevel@tonic-gate &flg)) < 0) { 1227c478bd9Sstevel@tonic-gate if (errno == EAGAIN) 1237c478bd9Sstevel@tonic-gate t_errno = TNODATA; 1247c478bd9Sstevel@tonic-gate else 1257c478bd9Sstevel@tonic-gate t_errno = TSYSERR; 1267c478bd9Sstevel@tonic-gate sv_errno = errno; 1277c478bd9Sstevel@tonic-gate sig_mutex_lock(&tiptr->ti_lock); 1287c478bd9Sstevel@tonic-gate errno = sv_errno; 1297c478bd9Sstevel@tonic-gate goto err_out; 1307c478bd9Sstevel@tonic-gate } 1317c478bd9Sstevel@tonic-gate sig_mutex_lock(&tiptr->ti_lock); 1327c478bd9Sstevel@tonic-gate 133*61961e0fSrobinson if (((struct strbuf *)&unitdata->udata)->len == -1) 134*61961e0fSrobinson unitdata->udata.len = 0; 1357c478bd9Sstevel@tonic-gate 1367c478bd9Sstevel@tonic-gate /* 1377c478bd9Sstevel@tonic-gate * is there control piece with data? 1387c478bd9Sstevel@tonic-gate */ 1397c478bd9Sstevel@tonic-gate if (ctlbuf.len > 0) { 1407c478bd9Sstevel@tonic-gate if (ctlbuf.len < (int)sizeof (t_scalar_t)) { 1417c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 1427c478bd9Sstevel@tonic-gate t_errno = TSYSERR; 1437c478bd9Sstevel@tonic-gate errno = EPROTO; 1447c478bd9Sstevel@tonic-gate goto err_out; 1457c478bd9Sstevel@tonic-gate } 1467c478bd9Sstevel@tonic-gate 147*61961e0fSrobinson /* LINTED pointer cast */ 1487c478bd9Sstevel@tonic-gate pptr = (union T_primitives *)ctlbuf.buf; 1497c478bd9Sstevel@tonic-gate 1507c478bd9Sstevel@tonic-gate switch (pptr->type) { 1517c478bd9Sstevel@tonic-gate 1527c478bd9Sstevel@tonic-gate case T_UNITDATA_IND: 1537c478bd9Sstevel@tonic-gate if ((ctlbuf.len < 1547c478bd9Sstevel@tonic-gate (int)sizeof (struct T_unitdata_ind)) || 1557c478bd9Sstevel@tonic-gate (pptr->unitdata_ind.OPT_length && 1567c478bd9Sstevel@tonic-gate (ctlbuf.len < (int)(pptr->unitdata_ind.OPT_length 1577c478bd9Sstevel@tonic-gate + pptr->unitdata_ind.OPT_offset)))) { 1587c478bd9Sstevel@tonic-gate t_errno = TSYSERR; 1597c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 1607c478bd9Sstevel@tonic-gate errno = EPROTO; 1617c478bd9Sstevel@tonic-gate goto err_out; 1627c478bd9Sstevel@tonic-gate } 1637c478bd9Sstevel@tonic-gate 1647c478bd9Sstevel@tonic-gate if (_T_IS_TLI(api_semantics) || 1657c478bd9Sstevel@tonic-gate unitdata->addr.maxlen > 0) { 1667c478bd9Sstevel@tonic-gate if (TLEN_GT_NLEN(pptr->unitdata_ind.SRC_length, 1677c478bd9Sstevel@tonic-gate unitdata->addr.maxlen)) { 1687c478bd9Sstevel@tonic-gate t_errno = TBUFOVFLW; 1697c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 1707c478bd9Sstevel@tonic-gate goto err_out; 1717c478bd9Sstevel@tonic-gate } 1727c478bd9Sstevel@tonic-gate (void) memcpy(unitdata->addr.buf, 1737c478bd9Sstevel@tonic-gate ctlbuf.buf + pptr->unitdata_ind.SRC_offset, 1747c478bd9Sstevel@tonic-gate (size_t)pptr->unitdata_ind.SRC_length); 1757c478bd9Sstevel@tonic-gate unitdata->addr.len = 1767c478bd9Sstevel@tonic-gate pptr->unitdata_ind.SRC_length; 1777c478bd9Sstevel@tonic-gate } 1787c478bd9Sstevel@tonic-gate if (_T_IS_TLI(api_semantics) || 1797c478bd9Sstevel@tonic-gate unitdata->opt.maxlen > 0) { 1807c478bd9Sstevel@tonic-gate if (TLEN_GT_NLEN(pptr->unitdata_ind.OPT_length, 1817c478bd9Sstevel@tonic-gate unitdata->opt.maxlen)) { 1827c478bd9Sstevel@tonic-gate t_errno = TBUFOVFLW; 1837c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 1847c478bd9Sstevel@tonic-gate goto err_out; 1857c478bd9Sstevel@tonic-gate } 1867c478bd9Sstevel@tonic-gate (void) memcpy(unitdata->opt.buf, ctlbuf.buf + 1877c478bd9Sstevel@tonic-gate pptr->unitdata_ind.OPT_offset, 1887c478bd9Sstevel@tonic-gate (size_t)pptr->unitdata_ind.OPT_length); 1897c478bd9Sstevel@tonic-gate unitdata->opt.len = 1907c478bd9Sstevel@tonic-gate pptr->unitdata_ind.OPT_length; 1917c478bd9Sstevel@tonic-gate } 1927c478bd9Sstevel@tonic-gate if (retval & MOREDATA) 1937c478bd9Sstevel@tonic-gate *flags |= T_MORE; 1947c478bd9Sstevel@tonic-gate /* 1957c478bd9Sstevel@tonic-gate * No state changes happens on T_RCVUDATA 1967c478bd9Sstevel@tonic-gate * event (NOOP). We do it only to log errors. 1977c478bd9Sstevel@tonic-gate */ 1987c478bd9Sstevel@tonic-gate _T_TX_NEXTSTATE(T_RCVUDATA, tiptr, 1997c478bd9Sstevel@tonic-gate "t_rcvudata: invalid state event T_RCVUDATA"); 2007c478bd9Sstevel@tonic-gate 2017c478bd9Sstevel@tonic-gate if (didalloc) 2027c478bd9Sstevel@tonic-gate free(ctlbuf.buf); 2037c478bd9Sstevel@tonic-gate else 2047c478bd9Sstevel@tonic-gate tiptr->ti_ctlbuf = ctlbuf.buf; 2057c478bd9Sstevel@tonic-gate 2067c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 2077c478bd9Sstevel@tonic-gate return (0); 2087c478bd9Sstevel@tonic-gate 2097c478bd9Sstevel@tonic-gate case T_UDERROR_IND: 2107c478bd9Sstevel@tonic-gate if (_t_register_lookevent(tiptr, 0, 0, ctlbuf.buf, 2117c478bd9Sstevel@tonic-gate ctlbuf.len) < 0) { 2127c478bd9Sstevel@tonic-gate t_errno = TSYSERR; 2137c478bd9Sstevel@tonic-gate errno = ENOMEM; 2147c478bd9Sstevel@tonic-gate goto err_out; 2157c478bd9Sstevel@tonic-gate } 2167c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 2177c478bd9Sstevel@tonic-gate t_errno = TLOOK; 2187c478bd9Sstevel@tonic-gate goto err_out; 2197c478bd9Sstevel@tonic-gate 2207c478bd9Sstevel@tonic-gate default: 2217c478bd9Sstevel@tonic-gate break; 2227c478bd9Sstevel@tonic-gate } 2237c478bd9Sstevel@tonic-gate 2247c478bd9Sstevel@tonic-gate t_errno = TSYSERR; 2257c478bd9Sstevel@tonic-gate errno = EPROTO; 2267c478bd9Sstevel@tonic-gate goto err_out; 2277c478bd9Sstevel@tonic-gate 2287c478bd9Sstevel@tonic-gate } else { /* else part of "if (ctlbuf.len > 0)" */ 2297c478bd9Sstevel@tonic-gate unitdata->addr.len = 0; 2307c478bd9Sstevel@tonic-gate unitdata->opt.len = 0; 2317c478bd9Sstevel@tonic-gate /* 2327c478bd9Sstevel@tonic-gate * only data in message no control piece 2337c478bd9Sstevel@tonic-gate */ 2347c478bd9Sstevel@tonic-gate if (retval & MOREDATA) 2357c478bd9Sstevel@tonic-gate *flags = T_MORE; 2367c478bd9Sstevel@tonic-gate /* 2377c478bd9Sstevel@tonic-gate * No state transition occurs on 2387c478bd9Sstevel@tonic-gate * event T_RCVUDATA. We do it only to 2397c478bd9Sstevel@tonic-gate * log errors. 2407c478bd9Sstevel@tonic-gate */ 2417c478bd9Sstevel@tonic-gate _T_TX_NEXTSTATE(T_RCVUDATA, tiptr, 2427c478bd9Sstevel@tonic-gate "t_rcvudata: invalid state event T_RCVUDATA"); 2437c478bd9Sstevel@tonic-gate if (didalloc) 2447c478bd9Sstevel@tonic-gate free(ctlbuf.buf); 2457c478bd9Sstevel@tonic-gate else 2467c478bd9Sstevel@tonic-gate tiptr->ti_ctlbuf = ctlbuf.buf; 2477c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 2487c478bd9Sstevel@tonic-gate return (0); 2497c478bd9Sstevel@tonic-gate } 2507c478bd9Sstevel@tonic-gate /* NOTREACHED */ 2517c478bd9Sstevel@tonic-gate err_out: 2527c478bd9Sstevel@tonic-gate sv_errno = errno; 2537c478bd9Sstevel@tonic-gate if (didalloc) 2547c478bd9Sstevel@tonic-gate free(ctlbuf.buf); 2557c478bd9Sstevel@tonic-gate else 2567c478bd9Sstevel@tonic-gate tiptr->ti_ctlbuf = ctlbuf.buf; 2577c478bd9Sstevel@tonic-gate sig_mutex_unlock(&tiptr->ti_lock); 2587c478bd9Sstevel@tonic-gate errno = sv_errno; 2597c478bd9Sstevel@tonic-gate return (-1); 2607c478bd9Sstevel@tonic-gate } 261