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 * Copyright 1998 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * Portions of this source code were derived from Berkeley 31 * under license from the Regents of the University of 32 * California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 #define NULL 0 38 #include <rpc/rpc.h> 39 #include <sys/types.h> 40 #include <rpc/trace.h> 41 #include "yp_b.h" 42 #include <rpcsvc/yp_prot.h> 43 #include <rpcsvc/ypclnt.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <string.h> 47 48 static int domaster(char *, char *, struct dom_binding *, struct timeval, 49 char **); 50 int __yp_master_rsvdport(); 51 52 /* 53 * This checks parameters, and implements the outer "until binding success" 54 * loop. 55 */ 56 int 57 yp_master (domain, map, master) 58 char *domain; 59 char *map; 60 char **master; 61 { 62 size_t domlen; 63 size_t maplen; 64 int reason; 65 struct dom_binding *pdomb; 66 67 trace1(TR_yp_master, 0); 68 if ((map == NULL) || (domain == NULL)) { 69 trace1(TR_yp_master, 1); 70 return (YPERR_BADARGS); 71 } 72 73 domlen = strlen(domain); 74 maplen = strlen(map); 75 76 if ((domlen == 0) || (domlen > YPMAXDOMAIN) || 77 (maplen == 0) || (maplen > YPMAXMAP) || 78 (master == NULL)) { 79 trace1(TR_yp_master, 1); 80 return (YPERR_BADARGS); 81 } 82 83 for (;;) { 84 85 if (reason = __yp_dobind(domain, &pdomb)) { 86 trace1(TR_yp_master, 1); 87 return (reason); 88 } 89 90 if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) { 91 92 reason = domaster(domain, map, pdomb, _ypserv_timeout, 93 master); 94 95 __yp_rel_binding(pdomb); 96 if (reason == YPERR_RPC) { 97 yp_unbind(domain); 98 (void) _sleep(_ypsleeptime); 99 } else { 100 break; 101 } 102 } else { 103 __yp_rel_binding(pdomb); 104 trace1(TR_yp_master, 1); 105 return (YPERR_VERS); 106 } 107 } 108 109 if (reason == YPERR_MAP && geteuid() == 0) { 110 /* 111 * Lookup could be for a secure map; fail over to retry 112 * from a reserved port. Only useful to try this if we're 113 * the super user. 114 */ 115 int rsvdreason; 116 rsvdreason = __yp_master_rsvdport(domain, map, master); 117 if (rsvdreason == 0) 118 reason = rsvdreason; 119 } 120 121 trace1(TR_yp_master, 1); 122 return (reason); 123 } 124 125 126 /* 127 * This function is identical to 'yp_master' with the exception that it calls 128 * '__yp_dobind_rsvdport' rather than '__yp_dobind' 129 */ 130 int 131 __yp_master_rsvdport (domain, map, master) 132 char *domain; 133 char *map; 134 char **master; 135 { 136 size_t domlen; 137 size_t maplen; 138 int reason; 139 struct dom_binding *pdomb; 140 141 trace1(TR_yp_master, 0); 142 if ((map == NULL) || (domain == NULL)) { 143 trace1(TR_yp_master, 1); 144 return (YPERR_BADARGS); 145 } 146 147 domlen = strlen(domain); 148 maplen = strlen(map); 149 150 if ((domlen == 0) || (domlen > YPMAXDOMAIN) || 151 (maplen == 0) || (maplen > YPMAXMAP) || 152 (master == NULL)) { 153 trace1(TR_yp_master, 1); 154 return (YPERR_BADARGS); 155 } 156 157 for (;;) { 158 159 if (reason = __yp_dobind_rsvdport(domain, &pdomb)) { 160 trace1(TR_yp_master, 1); 161 return (reason); 162 } 163 164 if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) { 165 166 reason = domaster(domain, map, pdomb, _ypserv_timeout, 167 master); 168 169 /* 170 * Have to free the binding since the reserved 171 * port bindings are not cached. 172 */ 173 __yp_rel_binding(pdomb); 174 free_dom_binding(pdomb); 175 if (reason == YPERR_RPC) { 176 yp_unbind(domain); 177 (void) _sleep(_ypsleeptime); 178 } else { 179 break; 180 } 181 } else { 182 /* 183 * Have to free the binding since the reserved 184 * port bindings are not cached. 185 */ 186 __yp_rel_binding(pdomb); 187 free_dom_binding(pdomb); 188 trace1(TR_yp_master, 1); 189 return (YPERR_VERS); 190 } 191 } 192 193 trace1(TR_yp_master, 1); 194 return (reason); 195 } 196 197 /* 198 * This talks v2 to ypserv 199 */ 200 static int 201 domaster (domain, map, pdomb, timeout, master) 202 char *domain; 203 char *map; 204 struct dom_binding *pdomb; 205 struct timeval timeout; 206 char **master; 207 { 208 struct ypreq_nokey req; 209 struct ypresp_master resp; 210 unsigned int retval = 0; 211 212 trace1(TR_domaster, 0); 213 req.domain = domain; 214 req.map = map; 215 (void) memset((char *) &resp, 0, sizeof (struct ypresp_master)); 216 217 /* 218 * Do the get_master request. If the rpc call failed, return with 219 * status from this point. 220 */ 221 222 if (clnt_call(pdomb->dom_client, 223 YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey, 224 (char *)&req, (xdrproc_t)xdr_ypresp_master, (char *)&resp, 225 timeout) != RPC_SUCCESS) { 226 trace1(TR_domaster, 1); 227 return (YPERR_RPC); 228 } 229 230 /* See if the request succeeded */ 231 232 if (resp.status != YP_TRUE) { 233 retval = ypprot_err(resp.status); 234 } 235 236 /* Get some memory which the user can get rid of as he likes */ 237 238 if (!retval && ((*master = malloc(strlen(resp.master) + 1)) 239 == NULL)) { 240 retval = YPERR_RESRC; 241 242 } 243 244 if (!retval) { 245 (void) strcpy(*master, resp.master); 246 } 247 248 CLNT_FREERES(pdomb->dom_client, 249 (xdrproc_t)xdr_ypresp_master, (char *)&resp); 250 trace1(TR_domaster, 1); 251 return (retval); 252 } 253