1 /* $OpenBSD: yp_master.c,v 1.8 2005/08/05 13:02:16 espie Exp $ */ 2 /* 3 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/types.h> 30 #include <string.h> 31 #include <rpc/rpc.h> 32 #include <rpc/xdr.h> 33 #include <rpcsvc/yp.h> 34 #include <rpcsvc/ypclnt.h> 35 #include "ypinternal.h" 36 37 int 38 yp_master(const char *indomain, const char *inmap, char **outname) 39 { 40 struct dom_binding *ysd; 41 struct ypresp_master yprm; 42 struct ypreq_nokey yprnk; 43 struct timeval tv; 44 int tries = 0, r; 45 46 if (indomain == NULL || *indomain == '\0' || 47 strlen(indomain) > YPMAXDOMAIN || inmap == NULL || 48 *inmap == '\0' || strlen(inmap) > YPMAXMAP || outname == NULL) 49 return YPERR_BADARGS; 50 51 again: 52 if (_yp_dobind(indomain, &ysd) != 0) 53 return YPERR_DOMAIN; 54 55 tv.tv_sec = _yplib_timeout; 56 tv.tv_usec = 0; 57 58 yprnk.domain = (char *)indomain; 59 yprnk.map = (char *)inmap; 60 61 (void)memset(&yprm, 0, sizeof yprm); 62 63 r = clnt_call(ysd->dom_client, YPPROC_MASTER, 64 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv); 65 if (r != RPC_SUCCESS) { 66 if (tries++) 67 clnt_perror(ysd->dom_client, "yp_master: clnt_call"); 68 ysd->dom_vers = -1; 69 goto again; 70 } 71 if (!(r = ypprot_err(yprm.stat))) { 72 if ((*outname = strdup(yprm.peer)) == NULL) 73 r = YPERR_RESRC; 74 } 75 xdr_free(xdr_ypresp_master, (char *) &yprm); 76 _yp_unbind(ysd); 77 return r; 78 } 79