xref: /illumos-gate/usr/src/lib/libnsl/yp/yp_master.c (revision 48bbca81)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
2161961e0fSrobinson  */
2261961e0fSrobinson 
2361961e0fSrobinson /*
24e8031f0aSraf  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
257c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
26*48bbca81SDaniel Hoffman  * Copyright (c) 2016 by Delphix. All rights reserved.
277c478bd9Sstevel@tonic-gate  */
287c478bd9Sstevel@tonic-gate 
297c478bd9Sstevel@tonic-gate /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
307c478bd9Sstevel@tonic-gate /*	  All Rights Reserved   */
317c478bd9Sstevel@tonic-gate 
327c478bd9Sstevel@tonic-gate /*
337c478bd9Sstevel@tonic-gate  * Portions of this source code were derived from Berkeley
347c478bd9Sstevel@tonic-gate  * under license from the Regents of the University of
357c478bd9Sstevel@tonic-gate  * California.
367c478bd9Sstevel@tonic-gate  */
377c478bd9Sstevel@tonic-gate 
387c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
397c478bd9Sstevel@tonic-gate 
40e8031f0aSraf #include "mt.h"
4161961e0fSrobinson #include <stdlib.h>
4261961e0fSrobinson #include <unistd.h>
437c478bd9Sstevel@tonic-gate #include <rpc/rpc.h>
447c478bd9Sstevel@tonic-gate #include <sys/types.h>
457c478bd9Sstevel@tonic-gate #include "yp_b.h"
467c478bd9Sstevel@tonic-gate #include <rpcsvc/yp_prot.h>
477c478bd9Sstevel@tonic-gate #include <rpcsvc/ypclnt.h>
487c478bd9Sstevel@tonic-gate #include <string.h>
497c478bd9Sstevel@tonic-gate 
507c478bd9Sstevel@tonic-gate static int domaster(char *, char *, struct dom_binding *, struct timeval,
517c478bd9Sstevel@tonic-gate     char **);
5261961e0fSrobinson extern int __yp_master_rsvdport(char *, char *, char **);
537c478bd9Sstevel@tonic-gate 
547c478bd9Sstevel@tonic-gate /*
557c478bd9Sstevel@tonic-gate  * This checks parameters, and implements the outer "until binding success"
567c478bd9Sstevel@tonic-gate  * loop.
577c478bd9Sstevel@tonic-gate  */
587c478bd9Sstevel@tonic-gate int
yp_master(char * domain,char * map,char ** master)5961961e0fSrobinson yp_master(char *domain, char *map, char **master)
607c478bd9Sstevel@tonic-gate {
617c478bd9Sstevel@tonic-gate 	size_t domlen;
627c478bd9Sstevel@tonic-gate 	size_t maplen;
637c478bd9Sstevel@tonic-gate 	int reason;
647c478bd9Sstevel@tonic-gate 	struct dom_binding *pdomb;
657c478bd9Sstevel@tonic-gate 
6661961e0fSrobinson 	if ((map == NULL) || (domain == NULL))
677c478bd9Sstevel@tonic-gate 		return (YPERR_BADARGS);
687c478bd9Sstevel@tonic-gate 
697c478bd9Sstevel@tonic-gate 	domlen = strlen(domain);
707c478bd9Sstevel@tonic-gate 	maplen = strlen(map);
717c478bd9Sstevel@tonic-gate 
727c478bd9Sstevel@tonic-gate 	if ((domlen == 0) || (domlen > YPMAXDOMAIN) ||
737c478bd9Sstevel@tonic-gate 	    (maplen == 0) || (maplen > YPMAXMAP) ||
7461961e0fSrobinson 	    (master == NULL))
757c478bd9Sstevel@tonic-gate 		return (YPERR_BADARGS);
767c478bd9Sstevel@tonic-gate 
777c478bd9Sstevel@tonic-gate 	for (;;) {
787c478bd9Sstevel@tonic-gate 
7961961e0fSrobinson 		if (reason = __yp_dobind(domain, &pdomb))
807c478bd9Sstevel@tonic-gate 			return (reason);
817c478bd9Sstevel@tonic-gate 
827c478bd9Sstevel@tonic-gate 		if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) {
837c478bd9Sstevel@tonic-gate 
847c478bd9Sstevel@tonic-gate 			reason = domaster(domain, map, pdomb, _ypserv_timeout,
857c478bd9Sstevel@tonic-gate 			    master);
867c478bd9Sstevel@tonic-gate 
877c478bd9Sstevel@tonic-gate 			__yp_rel_binding(pdomb);
887c478bd9Sstevel@tonic-gate 			if (reason == YPERR_RPC) {
897c478bd9Sstevel@tonic-gate 				yp_unbind(domain);
90e8031f0aSraf 				(void) sleep(_ypsleeptime);
917c478bd9Sstevel@tonic-gate 			} else {
927c478bd9Sstevel@tonic-gate 				break;
937c478bd9Sstevel@tonic-gate 			}
947c478bd9Sstevel@tonic-gate 		} else {
957c478bd9Sstevel@tonic-gate 			__yp_rel_binding(pdomb);
967c478bd9Sstevel@tonic-gate 			return (YPERR_VERS);
977c478bd9Sstevel@tonic-gate 		}
987c478bd9Sstevel@tonic-gate 	}
997c478bd9Sstevel@tonic-gate 
1007c478bd9Sstevel@tonic-gate 	if (reason == YPERR_MAP && geteuid() == 0) {
1017c478bd9Sstevel@tonic-gate 		/*
1027c478bd9Sstevel@tonic-gate 		 * Lookup could be for a secure map; fail over to retry
1037c478bd9Sstevel@tonic-gate 		 * from a reserved port. Only useful to try this if we're
1047c478bd9Sstevel@tonic-gate 		 * the super user.
1057c478bd9Sstevel@tonic-gate 		 */
1067c478bd9Sstevel@tonic-gate 		int rsvdreason;
1077c478bd9Sstevel@tonic-gate 		rsvdreason = __yp_master_rsvdport(domain, map, master);
1087c478bd9Sstevel@tonic-gate 		if (rsvdreason == 0)
1097c478bd9Sstevel@tonic-gate 			reason = rsvdreason;
1107c478bd9Sstevel@tonic-gate 	}
1117c478bd9Sstevel@tonic-gate 
1127c478bd9Sstevel@tonic-gate 	return (reason);
1137c478bd9Sstevel@tonic-gate }
1147c478bd9Sstevel@tonic-gate 
1157c478bd9Sstevel@tonic-gate 
1167c478bd9Sstevel@tonic-gate /*
1177c478bd9Sstevel@tonic-gate  * This function is identical to 'yp_master' with the exception that it calls
1187c478bd9Sstevel@tonic-gate  * '__yp_dobind_rsvdport' rather than '__yp_dobind'
1197c478bd9Sstevel@tonic-gate  */
1207c478bd9Sstevel@tonic-gate int
__yp_master_rsvdport(char * domain,char * map,char ** master)12161961e0fSrobinson __yp_master_rsvdport(char *domain, char *map, char **master)
1227c478bd9Sstevel@tonic-gate {
1237c478bd9Sstevel@tonic-gate 	size_t domlen;
1247c478bd9Sstevel@tonic-gate 	size_t maplen;
1257c478bd9Sstevel@tonic-gate 	int reason;
1267c478bd9Sstevel@tonic-gate 	struct dom_binding *pdomb;
1277c478bd9Sstevel@tonic-gate 
12861961e0fSrobinson 	if ((map == NULL) || (domain == NULL))
1297c478bd9Sstevel@tonic-gate 		return (YPERR_BADARGS);
1307c478bd9Sstevel@tonic-gate 
1317c478bd9Sstevel@tonic-gate 	domlen = strlen(domain);
1327c478bd9Sstevel@tonic-gate 	maplen = strlen(map);
1337c478bd9Sstevel@tonic-gate 
1347c478bd9Sstevel@tonic-gate 	if ((domlen == 0) || (domlen > YPMAXDOMAIN) ||
1357c478bd9Sstevel@tonic-gate 	    (maplen == 0) || (maplen > YPMAXMAP) ||
13661961e0fSrobinson 	    (master == NULL))
1377c478bd9Sstevel@tonic-gate 		return (YPERR_BADARGS);
1387c478bd9Sstevel@tonic-gate 
1397c478bd9Sstevel@tonic-gate 	for (;;) {
1407c478bd9Sstevel@tonic-gate 
14161961e0fSrobinson 		if (reason = __yp_dobind_rsvdport(domain, &pdomb))
1427c478bd9Sstevel@tonic-gate 			return (reason);
1437c478bd9Sstevel@tonic-gate 
1447c478bd9Sstevel@tonic-gate 		if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) {
1457c478bd9Sstevel@tonic-gate 
1467c478bd9Sstevel@tonic-gate 			reason = domaster(domain, map, pdomb, _ypserv_timeout,
1477c478bd9Sstevel@tonic-gate 			    master);
1487c478bd9Sstevel@tonic-gate 
1497c478bd9Sstevel@tonic-gate 			/*
1507c478bd9Sstevel@tonic-gate 			 * Have to free the binding since the reserved
1517c478bd9Sstevel@tonic-gate 			 * port bindings are not cached.
1527c478bd9Sstevel@tonic-gate 			 */
1537c478bd9Sstevel@tonic-gate 			__yp_rel_binding(pdomb);
1547c478bd9Sstevel@tonic-gate 			free_dom_binding(pdomb);
1557c478bd9Sstevel@tonic-gate 			if (reason == YPERR_RPC) {
1567c478bd9Sstevel@tonic-gate 				yp_unbind(domain);
157e8031f0aSraf 				(void) sleep(_ypsleeptime);
1587c478bd9Sstevel@tonic-gate 			} else {
1597c478bd9Sstevel@tonic-gate 				break;
1607c478bd9Sstevel@tonic-gate 			}
1617c478bd9Sstevel@tonic-gate 		} else {
1627c478bd9Sstevel@tonic-gate 			/*
1637c478bd9Sstevel@tonic-gate 			 * Have to free the binding since the reserved
1647c478bd9Sstevel@tonic-gate 			 * port bindings are not cached.
1657c478bd9Sstevel@tonic-gate 			 */
1667c478bd9Sstevel@tonic-gate 			__yp_rel_binding(pdomb);
1677c478bd9Sstevel@tonic-gate 			free_dom_binding(pdomb);
1687c478bd9Sstevel@tonic-gate 			return (YPERR_VERS);
1697c478bd9Sstevel@tonic-gate 		}
1707c478bd9Sstevel@tonic-gate 	}
1717c478bd9Sstevel@tonic-gate 	return (reason);
1727c478bd9Sstevel@tonic-gate }
1737c478bd9Sstevel@tonic-gate 
1747c478bd9Sstevel@tonic-gate /*
1757c478bd9Sstevel@tonic-gate  * This talks v2 to ypserv
1767c478bd9Sstevel@tonic-gate  */
1777c478bd9Sstevel@tonic-gate static int
domaster(char * domain,char * map,struct dom_binding * pdomb,struct timeval timeout,char ** master)17861961e0fSrobinson domaster(char *domain, char *map, struct dom_binding *pdomb,
17961961e0fSrobinson 					struct timeval timeout, char **master)
1807c478bd9Sstevel@tonic-gate {
1817c478bd9Sstevel@tonic-gate 	struct ypreq_nokey req;
1827c478bd9Sstevel@tonic-gate 	struct ypresp_master resp;
1837c478bd9Sstevel@tonic-gate 	unsigned int retval = 0;
1847c478bd9Sstevel@tonic-gate 
1857c478bd9Sstevel@tonic-gate 	req.domain = domain;
1867c478bd9Sstevel@tonic-gate 	req.map = map;
18761961e0fSrobinson 	(void) memset(&resp, 0, sizeof (struct ypresp_master));
1887c478bd9Sstevel@tonic-gate 
1897c478bd9Sstevel@tonic-gate 	/*
1907c478bd9Sstevel@tonic-gate 	 * Do the get_master request.  If the rpc call failed, return with
1917c478bd9Sstevel@tonic-gate 	 * status from this point.
1927c478bd9Sstevel@tonic-gate 	 */
1937c478bd9Sstevel@tonic-gate 
1947c478bd9Sstevel@tonic-gate 	if (clnt_call(pdomb->dom_client,
1957c478bd9Sstevel@tonic-gate 			YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey,
1967c478bd9Sstevel@tonic-gate 		    (char *)&req, (xdrproc_t)xdr_ypresp_master, (char *)&resp,
19761961e0fSrobinson 		    timeout) != RPC_SUCCESS)
1987c478bd9Sstevel@tonic-gate 		return (YPERR_RPC);
1997c478bd9Sstevel@tonic-gate 
2007c478bd9Sstevel@tonic-gate 	/* See if the request succeeded */
2017c478bd9Sstevel@tonic-gate 
20261961e0fSrobinson 	if (resp.status != YP_TRUE)
2037c478bd9Sstevel@tonic-gate 		retval = ypprot_err(resp.status);
2047c478bd9Sstevel@tonic-gate 
205*48bbca81SDaniel Hoffman 	/* Get some memory which the user can get rid of as they like */
2067c478bd9Sstevel@tonic-gate 
20761961e0fSrobinson 	if (!retval && ((*master = malloc(strlen(resp.master) + 1)) == NULL))
2087c478bd9Sstevel@tonic-gate 		retval = YPERR_RESRC;
2097c478bd9Sstevel@tonic-gate 
21061961e0fSrobinson 	if (!retval)
2117c478bd9Sstevel@tonic-gate 		(void) strcpy(*master, resp.master);
2127c478bd9Sstevel@tonic-gate 
2137c478bd9Sstevel@tonic-gate 	CLNT_FREERES(pdomb->dom_client,
2147c478bd9Sstevel@tonic-gate 		(xdrproc_t)xdr_ypresp_master, (char *)&resp);
2157c478bd9Sstevel@tonic-gate 	return (retval);
2167c478bd9Sstevel@tonic-gate }
217