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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright 1993-2003 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 <rpc/trace.h> 35 #include <stropts.h> 36 #include <stdlib.h> 37 #include <sys/timod.h> 38 #define _SUN_TPI_VERSION 2 39 #include <sys/tihdr.h> 40 #include <xti.h> 41 #include <fcntl.h> 42 #include <signal.h> 43 #include <errno.h> 44 #include <syslog.h> 45 #include "tx.h" 46 47 /* 48 * If a system call fails with EINTR after T_CONN_REQ is sent out, 49 * we change state for caller to continue with t_rcvconnect(). This 50 * semantics is not documented for TLI but is the direction taken with 51 * XTI so we adopt it. With this the call establishment is completed 52 * by calling t_rcvconnect() even for synchronous endpoints. 53 */ 54 int 55 _tx_connect( 56 int fd, 57 const struct t_call *sndcall, 58 struct t_call *rcvcall, 59 int api_semantics 60 ) 61 { 62 int fctlflg; 63 struct _ti_user *tiptr; 64 sigset_t mask; 65 struct strbuf ctlbuf; 66 int sv_errno; 67 int didalloc; 68 69 trace2(TR_t_connect, 0, fd); 70 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) { 71 sv_errno = errno; 72 trace2(TR_t_connect, 1, fd); 73 errno = sv_errno; 74 return (-1); 75 } 76 77 sig_mutex_lock(&tiptr->ti_lock); 78 if (_T_IS_XTI(api_semantics)) { 79 /* 80 * User level state verification only done for XTI 81 * because doing for TLI may break existing applications 82 */ 83 if (tiptr->ti_state != T_IDLE) { 84 t_errno = TOUTSTATE; 85 sig_mutex_unlock(&tiptr->ti_lock); 86 trace2(TR_t_connect, 1, fd); 87 return (-1); 88 } 89 } 90 91 /* 92 * Acquire ctlbuf for use in sending/receiving control part 93 * of the message. 94 */ 95 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 96 sv_errno = errno; 97 sig_mutex_unlock(&tiptr->ti_lock); 98 trace2(TR_t_connect, 1, fd); 99 errno = sv_errno; 100 return (-1); 101 } 102 /* 103 * Block all signals until T_CONN_REQ sent and 104 * acked with T_OK_ACK/ERROR_ACK 105 */ 106 (void) thr_sigsetmask(SIG_SETMASK, &fillset, &mask); 107 if (_t_snd_conn_req(tiptr, sndcall, &ctlbuf) < 0) { 108 sv_errno = errno; 109 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL); 110 errno = sv_errno; 111 /* 112 * At the TPI level, the error returned in a T_ERROR_ACK 113 * received in response to a T_CONN_REQ for an attempt to 114 * establish a duplicate conection has changed to a 115 * new t_errno code introduced with XTI (ADDRBUSY). 116 * We need to adjust TLI error code to be same as before. 117 */ 118 if (_T_IS_TLI(api_semantics) && t_errno == TADDRBUSY) 119 /* TLI only */ 120 t_errno = TBADADDR; 121 122 goto err_out; 123 } 124 (void) thr_sigsetmask(SIG_SETMASK, &mask, NULL); 125 126 if ((fctlflg = _fcntl(fd, F_GETFL, 0)) < 0) { 127 t_errno = TSYSERR; 128 goto err_out; 129 } 130 131 if (fctlflg & (O_NDELAY | O_NONBLOCK)) { 132 _T_TX_NEXTSTATE(T_CONNECT2, tiptr, 133 "t_connect: invalid state event T_CONNECT2"); 134 t_errno = TNODATA; 135 goto err_out; 136 } 137 138 /* 139 * Note: The following call to _t_rcv_conn_con blocks awaiting 140 * T_CONN_CON from remote client. Therefore it drops the 141 * tiptr->lock during the call (and reacquires it) 142 */ 143 if (_t_rcv_conn_con(tiptr, rcvcall, &ctlbuf, api_semantics) < 0) { 144 if ((t_errno == TSYSERR && errno == EINTR) || 145 t_errno == TLOOK) { 146 _T_TX_NEXTSTATE(T_CONNECT2, tiptr, 147 "t_connect: invalid state event T_CONNECT2"); 148 } else if (t_errno == TBUFOVFLW) { 149 _T_TX_NEXTSTATE(T_CONNECT1, tiptr, 150 "t_connect: invalid state event T_CONNECT1"); 151 } 152 goto err_out; 153 } 154 _T_TX_NEXTSTATE(T_CONNECT1, tiptr, 155 "t_connect: invalid state event T_CONNECT1"); 156 /* 157 * Update attributes which may have been negotiated during 158 * connection establishment for protocols where we suspect 159 * such negotiation is likely (e.g. OSI). We do not do it for 160 * all endpoints for performance reasons. Also, this code is 161 * deliberately done after user level state changes so even 162 * the (unlikely) failure case reflects a connected endpoint. 163 */ 164 if (tiptr->ti_tsdusize != 0) { 165 if (_t_do_postconn_sync(fd, tiptr) < 0) 166 goto err_out; 167 } 168 169 170 if (didalloc) 171 free(ctlbuf.buf); 172 else 173 tiptr->ti_ctlbuf = ctlbuf.buf; 174 sig_mutex_unlock(&tiptr->ti_lock); 175 trace2(TR_t_connect, 1, fd); 176 return (0); 177 178 err_out: 179 sv_errno = errno; 180 if (didalloc) 181 free(ctlbuf.buf); 182 else 183 tiptr->ti_ctlbuf = ctlbuf.buf; 184 sig_mutex_unlock(&tiptr->ti_lock); 185 186 trace2(TR_t_connect, 1, fd); 187 errno = sv_errno; 188 return (-1); 189 } 190