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