[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 <notify.h>
#include <pthread.h>
#include "ypinternal.h"

extern int notify_register_plain(char *, int *);

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;
	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, proto;
	int             count = 0;
	u_short		port;
	int status, notify_token;
	uint64_t abort;
	char *notify_name;

	/*
	 * 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)))
	{
		close(fd);
		return YPERR_YPBIND;
	}

	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)
	{
		ysd = calloc(1, sizeof(struct dom_binding));
		if (ysd == NULL) return YPERR_YPERR;
		ysd->dom_socket = -1;
		ysd->dom_vers = 0;
		new = 1;
	}

	/*
	 * Get notification token
	 * we use a self-notification token to allow a caller
	 * to signal the thread doing this bind call to quit.
	 */
	notify_name = NULL;
	notify_token = -1;

	asprintf(&notify_name, "self.thread.%lu", (unsigned long)pthread_self());
	if (notify_name != NULL) 
	{
		status = notify_register_plain(notify_name, &notify_token);
		free(notify_name);
	}

again:
	if (notify_token != -1)
	{
		abort = 0;
		status = notify_get_state(notify_token, &abort);
		if (abort == ThreadStateExitRequested)
		{
			if (new) free(ysd);
			notify_cancel(notify_token);
			return YPERR_YPBIND;
		}
	}

	proto = YP_BIND_UDP;
	if (ysd->dom_vers == YP_BIND_TCP) proto = YP_BIND_TCP;

	if ((ysd->dom_vers == 0) || (ysd->dom_vers == YP_BIND_UDP) || (ysd->dom_vers == YP_BIND_TCP))
	{
		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);
			if (notify_token != -1) notify_cancel(notify_token);
			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);
			if (notify_token != -1) notify_cancel(notify_token);
			return YPERR_YPBIND;
		}

		tv.tv_sec = _yplib_timeout;
		tv.tv_usec = 0;

		r = clnt_call(client, YPBINDPROC_DOMAIN, (xdrproc_t)xdr_domainname, &dom, (xdrproc_t)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 = proto;
			goto again;
		}

		clnt_destroy(client);

		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);
			if (notify_token != -1) notify_cancel(notify_token);
			return YPERR_YPBIND;
		}

		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;
		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;

	if (proto == YP_BIND_UDP) ysd->dom_client = clntudp_create(&ysd->dom_server_addr, YPPROG, YPVERS, tv, &ysd->dom_socket);
	else ysd->dom_client = clnttcp_create(&ysd->dom_server_addr, YPPROG, YPVERS, &ysd->dom_socket, 0, 0);

	if (ysd->dom_client == NULL)
	{
		if (proto == YP_BIND_UDP) clnt_pcreateerror("clntudp_create");
		else clnt_pcreateerror("clnttcp_create");
		ysd->dom_vers = proto;
		goto again;
	}

	if (notify_token != -1) notify_cancel(notify_token);

	if (fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
		perror("fcntl: F_SETFD");

	if (new != 0)
	{
		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	*
ad21edcc A	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.
03fb6eb0 A	13	*
03fb6eb0 A	14	* The Original Code and all software distributed under the License are
ad21edcc	15	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
03fb6eb0 A	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
03fb6eb0 A	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
ad21edcc A	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.
03fb6eb0 A	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>
b3dd680f A	74	#include <notify.h>
b3dd680f A	75	#include <pthread.h>
03fb6eb0 A	76	#include "ypinternal.h"
03fb6eb0 A	77
b3dd680f A	78	extern int notify_register_plain(char , int );
b3dd680f A	79
03fb6eb0 A	80	struct dom_binding *_ypbindlist = NULL;
	81	char _yp_domain[MAXHOSTNAMELEN] = { '\0' };
	82
	83	int _yplib_timeout = 10;
	84
	85	int
	86	_yp_dobind(dom, ypdb)
	87	const char *dom;
	88	struct dom_binding **ypdb;
	89	{
	90	static int pid = -1;
03fb6eb0 A	91	struct dom_binding ysd, ysd2;
	92	struct ypbind_resp ypbr;
	93	struct timeval tv;
	94	struct sockaddr_in clnt_sin;
	95	struct ypbind_binding *bn;
	96	int clnt_sock, fd, gpid;
	97	CLIENT *client;
b3dd680f	98	int new = 0, r, proto;
03fb6eb0 A	99	int count = 0;
03fb6eb0 A	100	u_short port;
b3dd680f A	101	int status, notify_token;
	102	uint64_t abort;
	103	char *notify_name;
03fb6eb0 A	104
	105	/*
	106	* test if YP is running or not
	107	*/
b3dd680f A	108	if ((fd = open(YPBINDLOCK, O_RDONLY)) == -1) return YPERR_YPBIND;
	109
	110	if (!((flock(fd, LOCK_EX \| LOCK_NB) == -1) && (errno == EWOULDBLOCK)))
	111	{
	112	close(fd);
03fb6eb0 A	113	return YPERR_YPBIND;
03fb6eb0 A	114	}
b3dd680f A	115
b3dd680f A	116	close(fd);
03fb6eb0 A	117
03fb6eb0 A	118	gpid = getpid();
b3dd680f A	119	if (!((pid == -1) \|\| (pid == gpid)))
b3dd680f A	120	{
03fb6eb0	121	ysd = _ypbindlist;
b3dd680f A	122	while (ysd)
	123	{
	124	if (ysd->dom_client) clnt_destroy(ysd->dom_client);
03fb6eb0 A	125	ysd2 = ysd->dom_pnext;
	126	free(ysd);
	127	ysd = ysd2;
	128	}
b3dd680f	129
03fb6eb0 A	130	_ypbindlist = NULL;
03fb6eb0 A	131	}
b3dd680f	132
03fb6eb0 A	133	pid = gpid;
03fb6eb0 A	134
b3dd680f	135	if (ypdb != NULL) *ypdb = NULL;
03fb6eb0	136
b3dd680f	137	if ((dom == NULL) \|\| (strlen(dom) == 0)) return YPERR_BADARGS;
03fb6eb0 A	138
03fb6eb0 A	139	for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
b3dd680f A	140	{
	141	if (strcmp(dom, ysd->dom_domain) == 0) break;
	142	}
	143
	144	if (ysd == NULL)
	145	{
	146	ysd = calloc(1, sizeof(struct dom_binding));
	147	if (ysd == NULL) return YPERR_YPERR;
03fb6eb0 A	148	ysd->dom_socket = -1;
	149	ysd->dom_vers = 0;
	150	new = 1;
	151	}
03fb6eb0	152
b3dd680f A	153	/*
	154	* Get notification token
	155	* we use a self-notification token to allow a caller
	156	* to signal the thread doing this bind call to quit.
	157	*/
	158	notify_name = NULL;
	159	notify_token = -1;
	160
	161	asprintf(&notify_name, "self.thread.%lu", (unsigned long)pthread_self());
	162	if (notify_name != NULL)
	163	{
	164	status = notify_register_plain(notify_name, &notify_token);
	165	free(notify_name);
	166	}
	167
	168	again:
	169	if (notify_token != -1)
	170	{
	171	abort = 0;
	172	status = notify_get_state(notify_token, &abort);
	173	if (abort == ThreadStateExitRequested)
	174	{
	175	if (new) free(ysd);
	176	notify_cancel(notify_token);
03fb6eb0 A	177	return YPERR_YPBIND;
	178	}
	179	}
b3dd680f A	180
	181	proto = YP_BIND_UDP;
	182	if (ysd->dom_vers == YP_BIND_TCP) proto = YP_BIND_TCP;
	183
	184	if ((ysd->dom_vers == 0) \|\| (ysd->dom_vers == YP_BIND_UDP) \|\| (ysd->dom_vers == YP_BIND_TCP))
	185	{
	186	memset(&clnt_sin, 0, sizeof clnt_sin);
03fb6eb0 A	187	clnt_sin.sin_len = sizeof(struct sockaddr_in);
	188	clnt_sin.sin_family = AF_INET;
	189	clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
	190
	191	clnt_sock = RPC_ANYSOCK;
b3dd680f A	192	client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock, 0, 0);
	193	if (client == NULL)
	194	{
03fb6eb0	195	clnt_pcreateerror("clnttcp_create");
b3dd680f A	196	if (new) free(ysd);
b3dd680f A	197	if (notify_token != -1) notify_cancel(notify_token);
03fb6eb0 A	198	return YPERR_YPBIND;
03fb6eb0 A	199	}
b3dd680f A	200
	201	if ((ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) \|\| (ntohs(clnt_sin.sin_port) == 20))
	202	{
03fb6eb0 A	203	/*
	204	* YP was not running, but someone has registered
	205	* ypbind with portmap -- this simply means YP is
	206	* not running.
	207	*/
	208	clnt_destroy(client);
b3dd680f A	209	if (new) free(ysd);
b3dd680f A	210	if (notify_token != -1) notify_cancel(notify_token);
03fb6eb0 A	211	return YPERR_YPBIND;
03fb6eb0 A	212	}
b3dd680f	213
03fb6eb0 A	214	tv.tv_sec = _yplib_timeout;
03fb6eb0 A	215	tv.tv_usec = 0;
b3dd680f A	216
	217	r = clnt_call(client, YPBINDPROC_DOMAIN, (xdrproc_t)xdr_domainname, &dom, (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
	218	if (r != RPC_SUCCESS)
	219	{
	220	if (new == 0 \|\| count) fprintf(stderr, "YP server for domain %s not responding, still trying\n", dom);
03fb6eb0 A	221	count++;
03fb6eb0 A	222	clnt_destroy(client);
b3dd680f	223	ysd->dom_vers = proto;
03fb6eb0 A	224	goto again;
03fb6eb0 A	225	}
b3dd680f	226
03fb6eb0	227	clnt_destroy(client);
b3dd680f	228
03fb6eb0 A	229	bn = &ypbr.ypbind_resp_u.ypbind_bindinfo;
03fb6eb0 A	230	memcpy(&port, &bn->ypbind_binding_port, sizeof port);
b3dd680f A	231	if ((ntohs(port) >= IPPORT_RESERVED) \|\| (ntohs(port) == 20))
b3dd680f A	232	{
03fb6eb0 A	233	/*
	234	* This is bogus -- the ypbind wants me to
	235	* communicate to an insecure ypserv. We are
	236	* within rights to syslog this as an attack,
	237	* but for now we'll simply ignore it; real YP
	238	* is obviously not running.
	239	*/
b3dd680f A	240	if (new) free(ysd);
b3dd680f A	241	if (notify_token != -1) notify_cancel(notify_token);
03fb6eb0 A	242	return YPERR_YPBIND;
03fb6eb0 A	243	}
b3dd680f A	244
b3dd680f A	245	memset(&ysd->dom_server_addr, 0, sizeof ysd->dom_server_addr);
03fb6eb0 A	246	ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
03fb6eb0 A	247	ysd->dom_server_addr.sin_family = AF_INET;
b3dd680f A	248	memcpy(&ysd->dom_server_addr.sin_port, &bn->ypbind_binding_port, sizeof(ysd->dom_server_addr.sin_port));
b3dd680f A	249	memcpy(&ysd->dom_server_addr.sin_addr.s_addr, &bn->ypbind_binding_addr, sizeof(ysd->dom_server_addr.sin_addr.s_addr));
03fb6eb0 A	250	ysd->dom_server_port = ysd->dom_server_addr.sin_port;
03fb6eb0 A	251	ysd->dom_vers = YPVERS;
b3dd680f	252	strncpy(ysd->dom_domain, dom, sizeof ysd->dom_domain-1);
03fb6eb0 A	253	ysd->dom_domain[sizeof ysd->dom_domain-1] = '\0';
03fb6eb0 A	254	}
b3dd680f	255
03fb6eb0 A	256	tv.tv_sec = _yplib_timeout / 2;
03fb6eb0 A	257	tv.tv_usec = 0;
b3dd680f A	258
b3dd680f A	259	if (ysd->dom_client) clnt_destroy(ysd->dom_client);
03fb6eb0	260	ysd->dom_socket = RPC_ANYSOCK;
b3dd680f A	261
	262	if (proto == YP_BIND_UDP) ysd->dom_client = clntudp_create(&ysd->dom_server_addr, YPPROG, YPVERS, tv, &ysd->dom_socket);
	263	else ysd->dom_client = clnttcp_create(&ysd->dom_server_addr, YPPROG, YPVERS, &ysd->dom_socket, 0, 0);
	264
	265	if (ysd->dom_client == NULL)
	266	{
	267	if (proto == YP_BIND_UDP) clnt_pcreateerror("clntudp_create");
	268	else clnt_pcreateerror("clnttcp_create");
	269	ysd->dom_vers = proto;
03fb6eb0 A	270	goto again;
03fb6eb0 A	271	}
b3dd680f A	272
	273	if (notify_token != -1) notify_cancel(notify_token);
	274
03fb6eb0 A	275	if (fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
	276	perror("fcntl: F_SETFD");
	277
b3dd680f A	278	if (new != 0)
b3dd680f A	279	{
03fb6eb0 A	280	ysd->dom_pnext = _ypbindlist;
	281	_ypbindlist = ysd;
	282	}
b3dd680f A	283
b3dd680f A	284	if (ypdb != NULL) *ypdb = ysd;
03fb6eb0 A	285	return 0;
	286	}
	287
	288	void
	289	_yp_unbind(ypb)
	290	struct dom_binding *ypb;
	291	{
	292	if (ypb->dom_client) clnt_destroy(ypb->dom_client);
	293	ypb->dom_client = NULL;
	294	ypb->dom_socket = -1;
	295	}
	296
	297	int
	298	yp_bind(dom)
	299	const char *dom;
	300	{
	301	return _yp_dobind(dom, NULL);
	302	}
	303
	304	void
	305	yp_unbind(dom)
	306	const char *dom;
	307	{
	308	struct dom_binding ypb, ypbp;
	309
	310	ypbp = NULL;
	311	for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
	312	if (strcmp(dom, ypb->dom_domain) == 0) {
	313	if (ypb->dom_client) clnt_destroy(ypb->dom_client);
	314	if (ypbp)
	315	ypbp->dom_pnext = ypb->dom_pnext;
	316	else
	317	_ypbindlist = ypb->dom_pnext;
	318	free(ypb);
	319	return;
	320	}
	321	ypbp = ypb;
	322	}
	323	}