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" /* SVr4.0 1.7 */ 32 33 #include "mt.h" 34 #include <stropts.h> 35 #include <stdlib.h> 36 #include <sys/timod.h> 37 #define _SUN_TPI_VERSION 2 38 #include <sys/tihdr.h> 39 #include <xti.h> 40 #include <fcntl.h> 41 #include <signal.h> 42 #include <errno.h> 43 #include <syslog.h> 44 #include "tx.h" 45 46 /* 47 * If a system call fails with EINTR after T_CONN_REQ is sent out, 48 * we change state for caller to continue with t_rcvconnect(). This 49 * semantics is not documented for TLI but is the direction taken with 50 * XTI so we adopt it. With this the call establishment is completed 51 * by calling t_rcvconnect() even for synchronous endpoints. 52 */ 53 int 54 _tx_connect( 55 int fd, 56 const struct t_call *sndcall, 57 struct t_call *rcvcall, 58 int api_semantics 59 ) 60 { 61 int fctlflg; 62 struct _ti_user *tiptr; 63 sigset_t mask; 64 struct strbuf ctlbuf; 65 int sv_errno; 66 int didalloc; 67 68 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) 69 return (-1); 70 71 sig_mutex_lock(&tiptr->ti_lock); 72 if (_T_IS_XTI(api_semantics)) { 73 /* 74 * User level state verification only done for XTI 75 * because doing for TLI may break existing applications 76 */ 77 if (tiptr->ti_state != T_IDLE) { 78 t_errno = TOUTSTATE; 79 sig_mutex_unlock(&tiptr->ti_lock); 80 return (-1); 81 } 82 } 83 84 /* 85 * Acquire ctlbuf for use in sending/receiving control part 86 * of the message. 87 */ 88 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 89 sv_errno = errno; 90 sig_mutex_unlock(&tiptr->ti_lock); 91 errno = sv_errno; 92 return (-1); 93 } 94 /* 95 * Block all signals until T_CONN_REQ sent and 96 * acked with T_OK_ACK/ERROR_ACK 97 */ 98 (void) thr_sigsetmask(SIG_SETMASK, &fillset, &mask); 99 if (_t_snd_conn_req(tiptr, sndcall, &ctlbuf) < 0) { 100 sv_errno = errno; 101 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL); 102 errno = sv_errno; 103 /* 104 * At the TPI level, the error returned in a T_ERROR_ACK 105 * received in response to a T_CONN_REQ for an attempt to 106 * establish a duplicate conection has changed to a 107 * new t_errno code introduced with XTI (ADDRBUSY). 108 * We need to adjust TLI error code to be same as before. 109 */ 110 if (_T_IS_TLI(api_semantics) && t_errno == TADDRBUSY) 111 /* TLI only */ 112 t_errno = TBADADDR; 113 114 goto err_out; 115 } 116 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL); 117 118 if ((fctlflg = fcntl(fd, F_GETFL, 0)) < 0) { 119 t_errno = TSYSERR; 120 goto err_out; 121 } 122 123 if (fctlflg & (O_NDELAY | O_NONBLOCK)) { 124 _T_TX_NEXTSTATE(T_CONNECT2, tiptr, 125 "t_connect: invalid state event T_CONNECT2"); 126 t_errno = TNODATA; 127 goto err_out; 128 } 129 130 /* 131 * Note: The following call to _t_rcv_conn_con blocks awaiting 132 * T_CONN_CON from remote client. Therefore it drops the 133 * tiptr->lock during the call (and reacquires it) 134 */ 135 if (_t_rcv_conn_con(tiptr, rcvcall, &ctlbuf, api_semantics) < 0) { 136 if ((t_errno == TSYSERR && errno == EINTR) || 137 t_errno == TLOOK) { 138 _T_TX_NEXTSTATE(T_CONNECT2, tiptr, 139 "t_connect: invalid state event T_CONNECT2"); 140 } else if (t_errno == TBUFOVFLW) { 141 _T_TX_NEXTSTATE(T_CONNECT1, tiptr, 142 "t_connect: invalid state event T_CONNECT1"); 143 } 144 goto err_out; 145 } 146 _T_TX_NEXTSTATE(T_CONNECT1, tiptr, 147 "t_connect: invalid state event T_CONNECT1"); 148 /* 149 * Update attributes which may have been negotiated during 150 * connection establishment for protocols where we suspect 151 * such negotiation is likely (e.g. OSI). We do not do it for 152 * all endpoints for performance reasons. Also, this code is 153 * deliberately done after user level state changes so even 154 * the (unlikely) failure case reflects a connected endpoint. 155 */ 156 if (tiptr->ti_tsdusize != 0) { 157 if (_t_do_postconn_sync(fd, tiptr) < 0) 158 goto err_out; 159 } 160 161 162 if (didalloc) 163 free(ctlbuf.buf); 164 else 165 tiptr->ti_ctlbuf = ctlbuf.buf; 166 sig_mutex_unlock(&tiptr->ti_lock); 167 return (0); 168 169 err_out: 170 sv_errno = errno; 171 if (didalloc) 172 free(ctlbuf.buf); 173 else 174 tiptr->ti_ctlbuf = ctlbuf.buf; 175 sig_mutex_unlock(&tiptr->ti_lock); 176 177 errno = sv_errno; 178 return (-1); 179 } 180