[apple/libinfo.git] / nis.subproj / yp_bind.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.1 (the "License").  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1996 Theo de Raadt <deraadt@theos.com>
 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Theo de Raadt.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: yp_bind.c,v 1.9 1997/04/29 21:25:20 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "ypinternal.h"

struct dom_binding *_ypbindlist = NULL;
char _yp_domain[MAXHOSTNAMELEN] = { '\0' };

int _yplib_timeout = 10;

int
_yp_dobind(dom, ypdb)
	const char     *dom;
	struct dom_binding **ypdb;
{
	static int      pid = -1;
	char            path[MAXPATHLEN];
	struct dom_binding *ysd, *ysd2;
	struct ypbind_resp ypbr;
	struct timeval  tv;
	struct sockaddr_in clnt_sin;
	struct ypbind_binding *bn;
	int             clnt_sock, fd, gpid;
	CLIENT         *client;
	int             new = 0, r;
	int             count = 0;
	u_short		port;

	/*
	 * test if YP is running or not
	 */
	if ((fd = open(YPBINDLOCK, O_RDONLY)) == -1)
		return YPERR_YPBIND;
	if (!(flock(fd, LOCK_EX | LOCK_NB) == -1 && errno == EWOULDBLOCK)) {
		(void)close(fd);
		return YPERR_YPBIND;
	}
	(void)close(fd);

	gpid = getpid();
	if (!(pid == -1 || pid == gpid)) {
		ysd = _ypbindlist;
		while (ysd) {
			if (ysd->dom_client)
				clnt_destroy(ysd->dom_client);
			ysd2 = ysd->dom_pnext;
			free(ysd);
			ysd = ysd2;
		}
		_ypbindlist = NULL;
	}
	pid = gpid;

	if (ypdb != NULL)
		*ypdb = NULL;

	if (dom == NULL || strlen(dom) == 0)
		return YPERR_BADARGS;

	for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
		if (strcmp(dom, ysd->dom_domain) == 0)
			break;
	if (ysd == NULL) {
		if ((ysd = malloc(sizeof *ysd)) == NULL)
			return YPERR_YPERR;
		(void)memset(ysd, 0, sizeof *ysd);
		ysd->dom_socket = -1;
		ysd->dom_vers = 0;
		new = 1;
	}
again:
	if (ysd->dom_vers == 0) {
		(void) snprintf(path, sizeof(path), "%s/%s.%d",
		    BINDINGDIR, dom, 2);
		if ((fd = open(path, O_RDONLY)) == -1) {
			/*
			 * no binding file, YP is dead, or not yet fully
			 * alive.
			 */
			goto trynet;
		}
		if (flock(fd, LOCK_EX | LOCK_NB) == -1 &&
		    errno == EWOULDBLOCK) {
			struct iovec    iov[2];
			u_short         ypb_port;

			/*
			 * we fetch the ypbind port number, but do
			 * nothing with it.
			 */
			iov[0].iov_base = (caddr_t) &ypb_port;
			iov[0].iov_len = sizeof ypb_port;
			iov[1].iov_base = (caddr_t) &ypbr;
			iov[1].iov_len = sizeof ypbr;

			r = readv(fd, iov, 2);
			if (r != iov[0].iov_len + iov[1].iov_len) {
				(void)close(fd);
				ysd->dom_vers = -1;
				goto again;
			}
			(void)close(fd);
			goto gotdata;
		} else {
			/* no lock on binding file, YP is dead. */
			(void)close(fd);
			if (new)
				free(ysd);
			return YPERR_YPBIND;
		}
	}
trynet:
	if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
		(void)memset(&clnt_sin, 0, sizeof clnt_sin);
		clnt_sin.sin_len = sizeof(struct sockaddr_in);
		clnt_sin.sin_family = AF_INET;
		clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

		clnt_sock = RPC_ANYSOCK;
		client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS,
		    &clnt_sock, 0, 0);
		if (client == NULL) {
			clnt_pcreateerror("clnttcp_create");
			if (new)
				free(ysd);
			return YPERR_YPBIND;
		}
		if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED ||
		    ntohs(clnt_sin.sin_port) == 20) {
			/*
			 * YP was not running, but someone has registered
			 * ypbind with portmap -- this simply means YP is
			 * not running.
			 */
			clnt_destroy(client);
			if (new)
				free(ysd);
			return YPERR_YPBIND;
		}
		tv.tv_sec = _yplib_timeout;
		tv.tv_usec = 0;
		r = clnt_call(client, YPBINDPROC_DOMAIN, xdr_domainname,
		    &dom, xdr_ypbind_resp, &ypbr, tv);
		if (r != RPC_SUCCESS) {
			if (new == 0 || count)
				fprintf(stderr,
		    "YP server for domain %s not responding, still trying\n",
				    dom);
			count++;
			clnt_destroy(client);
			ysd->dom_vers = -1;
			goto again;
		}
		clnt_destroy(client);
gotdata:
		bn = &ypbr.ypbind_resp_u.ypbind_bindinfo;
		memcpy(&port, &bn->ypbind_binding_port, sizeof port);
		if (ntohs(port) >= IPPORT_RESERVED ||
		    ntohs(port) == 20) {
			/*
			 * This is bogus -- the ypbind wants me to
			 * communicate to an insecure ypserv.  We are
			 * within rights to syslog this as an attack,
			 * but for now we'll simply ignore it; real YP
			 * is obviously not running.
			 */
			if (new)
				free(ysd);
			return YPERR_YPBIND;
		}
		(void)memset(&ysd->dom_server_addr, 0, 
		    sizeof ysd->dom_server_addr);
		ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
		ysd->dom_server_addr.sin_family = AF_INET;
		memcpy(&ysd->dom_server_addr.sin_port,
		    &bn->ypbind_binding_port,
		    sizeof(ysd->dom_server_addr.sin_port));
		memcpy(&ysd->dom_server_addr.sin_addr.s_addr,
		    &bn->ypbind_binding_addr,
		    sizeof(ysd->dom_server_addr.sin_addr.s_addr));
		ysd->dom_server_port = ysd->dom_server_addr.sin_port;
		ysd->dom_vers = YPVERS;
		(void)strncpy(ysd->dom_domain, dom, sizeof ysd->dom_domain-1);
		ysd->dom_domain[sizeof ysd->dom_domain-1] = '\0';
	}
	tv.tv_sec = _yplib_timeout / 2;
	tv.tv_usec = 0;
	if (ysd->dom_client)
		clnt_destroy(ysd->dom_client);
	ysd->dom_socket = RPC_ANYSOCK;
	ysd->dom_client = clntudp_create(&ysd->dom_server_addr,
	    YPPROG, YPVERS, tv, &ysd->dom_socket);
	if (ysd->dom_client == NULL) {
		clnt_pcreateerror("clntudp_create");
		ysd->dom_vers = -1;
		goto again;
	}
	if (fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
		perror("fcntl: F_SETFD");

	if (new) {
		ysd->dom_pnext = _ypbindlist;
		_ypbindlist = ysd;
	}
	if (ypdb != NULL)
		*ypdb = ysd;
	return 0;
}

void
_yp_unbind(ypb)
	struct dom_binding *ypb;
{
	if (ypb->dom_client) clnt_destroy(ypb->dom_client);
	ypb->dom_client = NULL;
	ypb->dom_socket = -1;
}

int
yp_bind(dom)
	const char     *dom;
{
	return _yp_dobind(dom, NULL);
}

void
yp_unbind(dom)
	const char     *dom;
{
	struct dom_binding *ypb, *ypbp;

	ypbp = NULL;
	for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
		if (strcmp(dom, ypb->dom_domain) == 0) {
			if (ypb->dom_client) clnt_destroy(ypb->dom_client);
			if (ypbp)
				ypbp->dom_pnext = ypb->dom_pnext;
			else
				_ypbindlist = ypb->dom_pnext;
			free(ypb);
			return;
		}
		ypbp = ypb;
	}
}
Commit	Line	Data
03fb6eb0 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.1 (the "License"). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License.
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1996 Theo de Raadt <deraadt@theos.com>
	26	* Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
	27	* All rights reserved.
	28	*
	29	* Redistribution and use in source and binary forms, with or without
	30	* modification, are permitted provided that the following conditions
	31	* are met:
	32	* 1. Redistributions of source code must retain the above copyright
	33	* notice, this list of conditions and the following disclaimer.
	34	* 2. Redistributions in binary form must reproduce the above copyright
	35	* notice, this list of conditions and the following disclaimer in the
	36	* documentation and/or other materials provided with the distribution.
	37	* 3. All advertising materials mentioning features or use of this software
	38	* must display the following acknowledgement:
	39	* This product includes software developed by Theo de Raadt.
	40	* 4. The name of the author may not be used to endorse or promote products
	41	* derived from this software without specific prior written permission.
	42	*
	43	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
	44	* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	45	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	46	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	47	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	48	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	49	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	50	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	51	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	52	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	53	* SUCH DAMAGE.
	54	*/
	55
	56	#if defined(LIBC_SCCS) && !defined(lint)
	57	static char *rcsid = "$OpenBSD: yp_bind.c,v 1.9 1997/04/29 21:25:20 deraadt Exp $";
	58	#endif /* LIBC_SCCS and not lint */
	59
	60	#include <sys/param.h>
	61	#include <sys/types.h>
	62	#include <sys/socket.h>
	63	#include <sys/file.h>
	64	#include <sys/uio.h>
65	#include <errno.h>
66	#include <stdio.h>
67	#include <stdlib.h>
68	#include <string.h>
69	#include <unistd.h>
70	#include <rpc/rpc.h>
71	#include <rpc/xdr.h>
72	#include <rpcsvc/yp.h>
73	#include <rpcsvc/ypclnt.h>
74	#include "ypinternal.h"
75
76	struct dom_binding *_ypbindlist = NULL;
77	char _yp_domain[MAXHOSTNAMELEN] = { '\0' };
78
79	int _yplib_timeout = 10;
80
81	int
82	_yp_dobind(dom, ypdb)
83	const char *dom;
84	struct dom_binding **ypdb;
85	{
86	static int pid = -1;
87	char path[MAXPATHLEN];
88	struct dom_binding ysd, ysd2;
89	struct ypbind_resp ypbr;
90	struct timeval tv;
91	struct sockaddr_in clnt_sin;
92	struct ypbind_binding *bn;
93	int clnt_sock, fd, gpid;
94	CLIENT *client;
95	int new = 0, r;
96	int count = 0;
97	u_short port;
98
99	/*
100	* test if YP is running or not
101	*/
102	if ((fd = open(YPBINDLOCK, O_RDONLY)) == -1)
103	return YPERR_YPBIND;
104	if (!(flock(fd, LOCK_EX \| LOCK_NB) == -1 && errno == EWOULDBLOCK)) {
105	(void)close(fd);
106	return YPERR_YPBIND;
107	}
108	(void)close(fd);
109
110	gpid = getpid();
111	if (!(pid == -1 \|\| pid == gpid)) {
112	ysd = _ypbindlist;
113	while (ysd) {
114	if (ysd->dom_client)
115	clnt_destroy(ysd->dom_client);
116	ysd2 = ysd->dom_pnext;
117	free(ysd);
118	ysd = ysd2;
119	}
120	_ypbindlist = NULL;
121	}
122	pid = gpid;
123
124	if (ypdb != NULL)
125	*ypdb = NULL;
126
127	if (dom == NULL \|\| strlen(dom) == 0)
128	return YPERR_BADARGS;
129
130	for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
131	if (strcmp(dom, ysd->dom_domain) == 0)
132	break;
133	if (ysd == NULL) {
134	if ((ysd = malloc(sizeof *ysd)) == NULL)
135	return YPERR_YPERR;
136	(void)memset(ysd, 0, sizeof *ysd);
137	ysd->dom_socket = -1;
138	ysd->dom_vers = 0;
139	new = 1;
140	}
141	again:
142	if (ysd->dom_vers == 0) {
143	(void) snprintf(path, sizeof(path), "%s/%s.%d",
144	BINDINGDIR, dom, 2);
145	if ((fd = open(path, O_RDONLY)) == -1) {
146	/*
147	* no binding file, YP is dead, or not yet fully
148	* alive.
149	*/
150	goto trynet;
151	}
152	if (flock(fd, LOCK_EX \| LOCK_NB) == -1 &&
153	errno == EWOULDBLOCK) {
154	struct iovec iov[2];
155	u_short ypb_port;
156
157	/*
158	* we fetch the ypbind port number, but do
159	* nothing with it.
160	*/
161	iov[0].iov_base = (caddr_t) &ypb_port;
162	iov[0].iov_len = sizeof ypb_port;
163	iov[1].iov_base = (caddr_t) &ypbr;
164	iov[1].iov_len = sizeof ypbr;
165
166	r = readv(fd, iov, 2);
167	if (r != iov[0].iov_len + iov[1].iov_len) {
168	(void)close(fd);
169	ysd->dom_vers = -1;
170	goto again;
171	}
172	(void)close(fd);
173	goto gotdata;
174	} else {
175	/* no lock on binding file, YP is dead. */
176	(void)close(fd);
177	if (new)
178	free(ysd);
179	return YPERR_YPBIND;
180	}
181	}
182	trynet:
183	if (ysd->dom_vers == -1 \|\| ysd->dom_vers == 0) {
184	(void)memset(&clnt_sin, 0, sizeof clnt_sin);
185	clnt_sin.sin_len = sizeof(struct sockaddr_in);
186	clnt_sin.sin_family = AF_INET;
187	clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
188
189	clnt_sock = RPC_ANYSOCK;
190	client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS,
191	&clnt_sock, 0, 0);
192	if (client == NULL) {
193	clnt_pcreateerror("clnttcp_create");
194	if (new)
195	free(ysd);
196	return YPERR_YPBIND;
197	}
198	if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED \|\|
199	ntohs(clnt_sin.sin_port) == 20) {
200	/*
201	* YP was not running, but someone has registered
202	* ypbind with portmap -- this simply means YP is
203	* not running.
204	*/
205	clnt_destroy(client);
206	if (new)
207	free(ysd);
208	return YPERR_YPBIND;
209	}
210	tv.tv_sec = _yplib_timeout;
211	tv.tv_usec = 0;
212	r = clnt_call(client, YPBINDPROC_DOMAIN, xdr_domainname,
213	&dom, xdr_ypbind_resp, &ypbr, tv);
214	if (r != RPC_SUCCESS) {
215	if (new == 0 \|\| count)
216	fprintf(stderr,
217	"YP server for domain %s not responding, still trying\n",
218	dom);
219	count++;
220	clnt_destroy(client);
221	ysd->dom_vers = -1;
222	goto again;
223	}
224	clnt_destroy(client);
225	gotdata:
226	bn = &ypbr.ypbind_resp_u.ypbind_bindinfo;
227	memcpy(&port, &bn->ypbind_binding_port, sizeof port);
228	if (ntohs(port) >= IPPORT_RESERVED \|\|
229	ntohs(port) == 20) {
230	/*
231	* This is bogus -- the ypbind wants me to
232	* communicate to an insecure ypserv. We are
233	* within rights to syslog this as an attack,
234	* but for now we'll simply ignore it; real YP
235	* is obviously not running.
236	*/
237	if (new)
238	free(ysd);
239	return YPERR_YPBIND;
240	}
241	(void)memset(&ysd->dom_server_addr, 0,
242	sizeof ysd->dom_server_addr);
243	ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
244	ysd->dom_server_addr.sin_family = AF_INET;
245	memcpy(&ysd->dom_server_addr.sin_port,
246	&bn->ypbind_binding_port,
247	sizeof(ysd->dom_server_addr.sin_port));
248	memcpy(&ysd->dom_server_addr.sin_addr.s_addr,
249	&bn->ypbind_binding_addr,
250	sizeof(ysd->dom_server_addr.sin_addr.s_addr));
251	ysd->dom_server_port = ysd->dom_server_addr.sin_port;
252	ysd->dom_vers = YPVERS;
253	(void)strncpy(ysd->dom_domain, dom, sizeof ysd->dom_domain-1);
254	ysd->dom_domain[sizeof ysd->dom_domain-1] = '\0';
255	}
256	tv.tv_sec = _yplib_timeout / 2;
257	tv.tv_usec = 0;
258	if (ysd->dom_client)
259	clnt_destroy(ysd->dom_client);
260	ysd->dom_socket = RPC_ANYSOCK;
261	ysd->dom_client = clntudp_create(&ysd->dom_server_addr,
262	YPPROG, YPVERS, tv, &ysd->dom_socket);
263	if (ysd->dom_client == NULL) {
264	clnt_pcreateerror("clntudp_create");
265	ysd->dom_vers = -1;
266	goto again;
267	}
268	if (fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
269	perror("fcntl: F_SETFD");
270
271	if (new) {
272	ysd->dom_pnext = _ypbindlist;
273	_ypbindlist = ysd;
274	}
275	if (ypdb != NULL)
276	*ypdb = ysd;
277	return 0;
278	}
279
280	void
281	_yp_unbind(ypb)
282	struct dom_binding *ypb;
283	{
284	if (ypb->dom_client) clnt_destroy(ypb->dom_client);
285	ypb->dom_client = NULL;
286	ypb->dom_socket = -1;
287	}
288
289	int
290	yp_bind(dom)
291	const char *dom;
292	{
293	return _yp_dobind(dom, NULL);
294	}
295
296	void
297	yp_unbind(dom)
298	const char *dom;
299	{
300	struct dom_binding ypb, ypbp;
301
302	ypbp = NULL;
303	for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
304	if (strcmp(dom, ypb->dom_domain) == 0) {
305	if (ypb->dom_client) clnt_destroy(ypb->dom_client);
306	if (ypbp)
307	ypbp->dom_pnext = ypb->dom_pnext;
308	else
309	_ypbindlist = ypb->dom_pnext;
310	free(ypb);
311	return;
312	}
313	ypbp = ypb;
314	}
315	}