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 * Copyright (c) 2016 by Delphix. All rights reserved. 27 */ 28 29 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 30 /* All Rights Reserved */ 31 32 /* 33 * Portions of this source code were derived from Berkeley 34 * under license from the Regents of the University of 35 * California. 36 */ 37 38 #include "mt.h" 39 #include <stdlib.h> 40 #include <unistd.h> 41 #include <rpc/rpc.h> 42 #include <sys/types.h> 43 #include "yp_b.h" 44 #include <rpcsvc/yp_prot.h> 45 #include <rpcsvc/ypclnt.h> 46 #include <string.h> 47 48 static int domaster(char *, char *, struct dom_binding *, struct timeval, 49 char **); 50 extern int __yp_master_rsvdport(char *, char *, char **); 51 52 /* 53 * This checks parameters, and implements the outer "until binding success" 54 * loop. 55 */ 56 int 57 yp_master(char *domain, char *map, char **master) 58 { 59 size_t domlen; 60 size_t maplen; 61 int reason; 62 struct dom_binding *pdomb; 63 64 if ((map == NULL) || (domain == NULL)) 65 return (YPERR_BADARGS); 66 67 domlen = strlen(domain); 68 maplen = strlen(map); 69 70 if ((domlen == 0) || (domlen > YPMAXDOMAIN) || 71 (maplen == 0) || (maplen > YPMAXMAP) || 72 (master == NULL)) 73 return (YPERR_BADARGS); 74 75 for (;;) { 76 77 if (reason = __yp_dobind(domain, &pdomb)) 78 return (reason); 79 80 if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) { 81 82 reason = domaster(domain, map, pdomb, _ypserv_timeout, 83 master); 84 85 __yp_rel_binding(pdomb); 86 if (reason == YPERR_RPC) { 87 yp_unbind(domain); 88 (void) sleep(_ypsleeptime); 89 } else { 90 break; 91 } 92 } else { 93 __yp_rel_binding(pdomb); 94 return (YPERR_VERS); 95 } 96 } 97 98 if (reason == YPERR_MAP && geteuid() == 0) { 99 /* 100 * Lookup could be for a secure map; fail over to retry 101 * from a reserved port. Only useful to try this if we're 102 * the super user. 103 */ 104 int rsvdreason; 105 rsvdreason = __yp_master_rsvdport(domain, map, master); 106 if (rsvdreason == 0) 107 reason = rsvdreason; 108 } 109 110 return (reason); 111 } 112 113 114 /* 115 * This function is identical to 'yp_master' with the exception that it calls 116 * '__yp_dobind_rsvdport' rather than '__yp_dobind' 117 */ 118 int 119 __yp_master_rsvdport(char *domain, char *map, char **master) 120 { 121 size_t domlen; 122 size_t maplen; 123 int reason; 124 struct dom_binding *pdomb; 125 126 if ((map == NULL) || (domain == NULL)) 127 return (YPERR_BADARGS); 128 129 domlen = strlen(domain); 130 maplen = strlen(map); 131 132 if ((domlen == 0) || (domlen > YPMAXDOMAIN) || 133 (maplen == 0) || (maplen > YPMAXMAP) || 134 (master == NULL)) 135 return (YPERR_BADARGS); 136 137 for (;;) { 138 139 if (reason = __yp_dobind_rsvdport(domain, &pdomb)) 140 return (reason); 141 142 if (pdomb->dom_binding->ypbind_hi_vers >= YPVERS) { 143 144 reason = domaster(domain, map, pdomb, _ypserv_timeout, 145 master); 146 147 /* 148 * Have to free the binding since the reserved 149 * port bindings are not cached. 150 */ 151 __yp_rel_binding(pdomb); 152 free_dom_binding(pdomb); 153 if (reason == YPERR_RPC) { 154 yp_unbind(domain); 155 (void) sleep(_ypsleeptime); 156 } else { 157 break; 158 } 159 } else { 160 /* 161 * Have to free the binding since the reserved 162 * port bindings are not cached. 163 */ 164 __yp_rel_binding(pdomb); 165 free_dom_binding(pdomb); 166 return (YPERR_VERS); 167 } 168 } 169 return (reason); 170 } 171 172 /* 173 * This talks v2 to ypserv 174 */ 175 static int 176 domaster(char *domain, char *map, struct dom_binding *pdomb, 177 struct timeval timeout, char **master) 178 { 179 struct ypreq_nokey req; 180 struct ypresp_master resp; 181 unsigned int retval = 0; 182 183 req.domain = domain; 184 req.map = map; 185 (void) memset(&resp, 0, sizeof (struct ypresp_master)); 186 187 /* 188 * Do the get_master request. If the rpc call failed, return with 189 * status from this point. 190 */ 191 192 if (clnt_call(pdomb->dom_client, 193 YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey, 194 (char *)&req, (xdrproc_t)xdr_ypresp_master, (char *)&resp, 195 timeout) != RPC_SUCCESS) 196 return (YPERR_RPC); 197 198 /* See if the request succeeded */ 199 200 if (resp.status != YP_TRUE) 201 retval = ypprot_err(resp.status); 202 203 /* Get some memory which the user can get rid of as they like */ 204 205 if (!retval && ((*master = malloc(strlen(resp.master) + 1)) == NULL)) 206 retval = YPERR_RESRC; 207 208 if (!retval) 209 (void) strcpy(*master, resp.master); 210 211 CLNT_FREERES(pdomb->dom_client, 212 (xdrproc_t)xdr_ypresp_master, (char *)&resp); 213 return (retval); 214 } 215