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
_tx_connect(int fd,const struct t_call * sndcall,struct t_call * rcvcall,int api_semantics)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