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"
32
33#include "mt.h"
34#include <stdlib.h>
35#include <errno.h>
36#include <unistd.h>
37#include <string.h>
38#include <stropts.h>
39#include <sys/stream.h>
40#include <xti.h>
41#define	_SUN_TPI_VERSION 2
42#include <sys/tihdr.h>
43#include <sys/timod.h>
44#include <assert.h>
45#include <signal.h>
46#include "tx.h"
47
48static int __tx_tlitpi_getprotaddr_locked(struct _ti_user *tiptr,
49	struct t_bind *boundaddr, struct t_bind *peer);
50
51
52static int __tx_getname_locked(int fd, struct netbuf *name, int type);
53
54int
55_tx_getname(int fd, struct netbuf *name, int type, int api_semantics)
56{
57	struct _ti_user *tiptr;
58	int retval, sv_errno;
59
60	assert(_T_IS_TLI(api_semantics)); /* TLI only interface */
61	if (!name || ((type != LOCALNAME) && (type != REMOTENAME))) {
62		errno = EINVAL;
63		return (-1);
64	}
65
66	if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
67		return (-1);
68	sig_mutex_lock(&tiptr->ti_lock);
69
70	retval = __tx_getname_locked(fd, name, type);
71
72	if (retval < 0) {
73		sv_errno = errno;
74		sig_mutex_unlock(&tiptr->ti_lock);
75		errno = sv_errno;
76		return (-1);
77	}
78
79	sig_mutex_unlock(&tiptr->ti_lock);
80
81	return (0);
82}
83
84
85static int
86__tx_getname_locked(int fd, struct netbuf *name, int type)
87{
88	int retval;
89
90	do {
91		retval = ioctl(fd,
92		    (type == LOCALNAME) ? TI_GETMYNAME : TI_GETPEERNAME, name);
93	} while (retval < 0 && errno == EINTR);
94
95	if (retval < 0) {
96		t_errno = TSYSERR;
97		return (-1);
98	}
99	return (0);
100}
101
102
103
104int
105_tx_getprotaddr(
106	int fd,
107	struct t_bind *boundaddr,
108	struct t_bind *peeraddr,
109	int api_semantics)
110{
111	struct _ti_user *tiptr;
112	int retval, sv_errno;
113	struct T_addr_req *addreqp;
114	struct T_addr_ack *addrackp;
115	int didalloc;
116	struct strbuf ctlbuf;
117	int retlen;
118
119	if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0)
120		return (-1);
121
122	sig_mutex_lock(&tiptr->ti_lock);
123
124	if ((tiptr->ti_prov_flag & XPG4_1) == 0) {
125		/*
126		 * Provider does not support XTI inspired TPI so we
127		 * try to do operation assuming TLI inspired TPI
128		 */
129		retval = __tx_tlitpi_getprotaddr_locked(tiptr, boundaddr,
130			peeraddr);
131		sv_errno = errno;
132		sig_mutex_unlock(&tiptr->ti_lock);
133		errno = sv_errno;
134		return (retval);
135	}
136
137	/*
138	 * Acquire buffer for use in sending/receiving the message.
139	 * Note: assumes (correctly) that ti_ctlsize is large enough
140	 * to hold sizeof (struct T_addr_req/ack)
141	 */
142	if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
143		sv_errno = errno;
144		sig_mutex_unlock(&tiptr->ti_lock);
145		errno = sv_errno;
146		return (-1);
147	}
148
149	/* LINTED pointer cast */
150	addreqp = (struct T_addr_req *)ctlbuf.buf;
151	addreqp->PRIM_type = T_ADDR_REQ;
152
153	do {
154		retval = _t_do_ioctl(fd, ctlbuf.buf,
155			(int)sizeof (struct T_addr_req), TI_GETADDRS, &retlen);
156	} while (retval < 0 && errno == EINTR);
157
158	/* retval can now be either 0 or -1 */
159	if (retval < 0) {
160		sv_errno = errno;
161		sig_mutex_unlock(&tiptr->ti_lock);
162		errno = sv_errno;
163		goto err_out;
164	}
165	sig_mutex_unlock(&tiptr->ti_lock);
166
167	if (retlen < (int)sizeof (struct T_addr_ack)) {
168		t_errno = TSYSERR;
169		errno = EIO;
170		retval = -1;
171		goto err_out;
172	}
173
174	/* LINTED pointer cast */
175	addrackp = (struct T_addr_ack *)ctlbuf.buf;
176
177	/*
178	 * We assume null parameters are OK and not errors
179	 */
180	if (boundaddr != NULL && boundaddr->addr.maxlen > 0) {
181		if (TLEN_GT_NLEN(addrackp->LOCADDR_length,
182		    boundaddr->addr.maxlen)) {
183			t_errno = TBUFOVFLW;
184			retval = -1;
185			goto err_out;
186		}
187		boundaddr->addr.len = addrackp->LOCADDR_length;
188		(void) memcpy(boundaddr->addr.buf,
189		    ctlbuf.buf + addrackp->LOCADDR_offset,
190		    (size_t)addrackp->LOCADDR_length);
191	}
192
193	/*
194	 * Note: In states where there is no remote end of the connection
195	 * the T_ADDR_REQ primitive does not return a remote address. However,
196	 * in protcols such as TCP, the transport connection is established
197	 * before the TLI/XTI level association is established. Therefore,
198	 * in state T_OUTCON, the transport may return a remote address where
199	 * TLI/XTI level thinks there is no remote end and therefore
200	 * no remote address should be returned. We therefore do not look at
201	 * address returned by transport provider in T_OUTCON state.
202	 * Tested by XTI test suite.
203	 */
204	if (tiptr->ti_state != T_OUTCON &&
205	    peeraddr != NULL && peeraddr->addr.maxlen > 0) {
206		if (TLEN_GT_NLEN(addrackp->REMADDR_length,
207		    peeraddr->addr.maxlen)) {
208			t_errno = TBUFOVFLW;
209			retval = -1;
210			goto err_out;
211		}
212		peeraddr->addr.len = addrackp->REMADDR_length;
213		(void) memcpy(peeraddr->addr.buf,
214		    ctlbuf.buf + addrackp->REMADDR_offset,
215		    (size_t)addrackp->REMADDR_length);
216	}
217
218err_out:
219	if (didalloc)
220		free(ctlbuf.buf);
221	else
222		tiptr->ti_ctlbuf = ctlbuf.buf;
223	return (retval);
224}
225
226static int
227__tx_tlitpi_getprotaddr_locked(
228	struct _ti_user *tiptr,
229	struct t_bind *boundaddr,
230	struct t_bind *peeraddr)
231{
232	if (boundaddr) {
233		boundaddr->addr.len = 0;
234		if (tiptr->ti_state >= TS_IDLE) {
235			/*
236			 * assume bound endpoint .
237			 * Note: TI_GETMYNAME can return
238			 * a finite length all zeroes address for unbound
239			 * endpoint so we avoid relying on it for bound
240			 * endpoints for XTI t_getprotaddr() semantics.
241			 */
242			if (__tx_getname_locked(tiptr->ti_fd, &boundaddr->addr,
243			    LOCALNAME) < 0)
244				return (-1);
245
246		}
247	}
248	if (peeraddr) {
249
250		peeraddr->addr.len = 0;
251
252		if (tiptr->ti_state >= TS_DATA_XFER) {
253			/*
254			 * assume connected endpoint.
255			 * The TI_GETPEERNAME call can fail with error
256			 * if endpoint is not connected so we don't call it
257			 * for XTI t_getprotaddr() semantics
258			 */
259			if (__tx_getname_locked(tiptr->ti_fd, &peeraddr->addr,
260			    REMOTENAME) < 0)
261				return (-1);
262		}
263	}
264	return (0);
265}
266