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 /*
24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 /*
32 * Portions of this source code were derived from Berkeley
33 * under license from the Regents of the University of
34 * California.
35 */
36
37 #pragma ident "%Z%%M% %I% %E% SMI"
38
39 #include "mt.h"
40 #include <stdlib.h>
41 #include <unistd.h>
42 #include <rpc/rpc.h>
43 #include <sys/types.h>
44 #include "yp_b.h"
45 #include <rpcsvc/yp_prot.h>
46 #include <rpcsvc/ypclnt.h>
47 #include <string.h>
48
49 static int domaster(char *, char *, struct dom_binding *, struct timeval,
50 char **);
51 extern int __yp_master_rsvdport(char *, char *, char **);
52
53 /*
54 * This checks parameters, and implements the outer "until binding success"
55 * loop.
56 */
57 int
yp_master(char * domain,char * map,char ** master)58 yp_master(char *domain, char *map, char **master)
59 {
60 size_t domlen;
61 size_t maplen;
62 int reason;
63 struct dom_binding *pdomb;
64
65 if ((map == NULL) || (domain == NULL))
66 return (YPERR_BADARGS);
67
68 domlen = strlen(domain);
69 maplen = strlen(map);
70
71 if ((domlen == 0) || (domlen > YPMAXDOMAIN) ||
72 (maplen == 0) || (maplen > YPMAXMAP) ||
73 (master == NULL))
74 return (YPERR_BADARGS);
75
76 for (;;) {
77
78 if (reason = __yp_dobind(domain, &pdomb))
79 return (reason);
80
81 if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) {
82
83 reason = domaster(domain, map, pdomb, _ypserv_timeout,
84 master);
85
86 __yp_rel_binding(pdomb);
87 if (reason == YPERR_RPC) {
88 yp_unbind(domain);
89 (void) sleep(_ypsleeptime);
90 } else {
91 break;
92 }
93 } else {
94 __yp_rel_binding(pdomb);
95 return (YPERR_VERS);
96 }
97 }
98
99 if (reason == YPERR_MAP && geteuid() == 0) {
100 /*
101 * Lookup could be for a secure map; fail over to retry
102 * from a reserved port. Only useful to try this if we're
103 * the super user.
104 */
105 int rsvdreason;
106 rsvdreason = __yp_master_rsvdport(domain, map, master);
107 if (rsvdreason == 0)
108 reason = rsvdreason;
109 }
110
111 return (reason);
112 }
113
114
115 /*
116 * This function is identical to 'yp_master' with the exception that it calls
117 * '__yp_dobind_rsvdport' rather than '__yp_dobind'
118 */
119 int
__yp_master_rsvdport(char * domain,char * map,char ** master)120 __yp_master_rsvdport(char *domain, char *map, char **master)
121 {
122 size_t domlen;
123 size_t maplen;
124 int reason;
125 struct dom_binding *pdomb;
126
127 if ((map == NULL) || (domain == NULL))
128 return (YPERR_BADARGS);
129
130 domlen = strlen(domain);
131 maplen = strlen(map);
132
133 if ((domlen == 0) || (domlen > YPMAXDOMAIN) ||
134 (maplen == 0) || (maplen > YPMAXMAP) ||
135 (master == NULL))
136 return (YPERR_BADARGS);
137
138 for (;;) {
139
140 if (reason = __yp_dobind_rsvdport(domain, &pdomb))
141 return (reason);
142
143 if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) {
144
145 reason = domaster(domain, map, pdomb, _ypserv_timeout,
146 master);
147
148 /*
149 * Have to free the binding since the reserved
150 * port bindings are not cached.
151 */
152 __yp_rel_binding(pdomb);
153 free_dom_binding(pdomb);
154 if (reason == YPERR_RPC) {
155 yp_unbind(domain);
156 (void) sleep(_ypsleeptime);
157 } else {
158 break;
159 }
160 } else {
161 /*
162 * Have to free the binding since the reserved
163 * port bindings are not cached.
164 */
165 __yp_rel_binding(pdomb);
166 free_dom_binding(pdomb);
167 return (YPERR_VERS);
168 }
169 }
170 return (reason);
171 }
172
173 /*
174 * This talks v2 to ypserv
175 */
176 static int
domaster(char * domain,char * map,struct dom_binding * pdomb,struct timeval timeout,char ** master)177 domaster(char *domain, char *map, struct dom_binding *pdomb,
178 struct timeval timeout, char **master)
179 {
180 struct ypreq_nokey req;
181 struct ypresp_master resp;
182 unsigned int retval = 0;
183
184 req.domain = domain;
185 req.map = map;
186 (void) memset(&resp, 0, sizeof (struct ypresp_master));
187
188 /*
189 * Do the get_master request. If the rpc call failed, return with
190 * status from this point.
191 */
192
193 if (clnt_call(pdomb->dom_client,
194 YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey,
195 (char *)&req, (xdrproc_t)xdr_ypresp_master, (char *)&resp,
196 timeout) != RPC_SUCCESS)
197 return (YPERR_RPC);
198
199 /* See if the request succeeded */
200
201 if (resp.status != YP_TRUE)
202 retval = ypprot_err(resp.status);
203
204 /* Get some memory which the user can get rid of as he likes */
205
206 if (!retval && ((*master = malloc(strlen(resp.master) + 1)) == NULL))
207 retval = YPERR_RESRC;
208
209 if (!retval)
210 (void) strcpy(*master, resp.master);
211
212 CLNT_FREERES(pdomb->dom_client,
213 (xdrproc_t)xdr_ypresp_master, (char *)&resp);
214 return (retval);
215 }
216