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 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 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 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