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