1 /* $OpenBSD: yp_first.c,v 1.9 2009/06/07 03:33:36 schwarze 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 <stdlib.h> 31 #include <string.h> 32 #include <rpc/rpc.h> 33 #include <rpc/xdr.h> 34 #include <rpcsvc/yp.h> 35 #include <rpcsvc/ypclnt.h> 36 #include "ypinternal.h" 37 38 int 39 yp_first(const char *indomain, const char *inmap, char **outkey, int *outkeylen, 40 char **outval, int *outvallen) 41 { 42 struct ypresp_key_val yprkv; 43 struct ypreq_nokey yprnk; 44 struct dom_binding *ysd; 45 struct timeval tv; 46 int tries = 0, r; 47 48 if (indomain == NULL || *indomain == '\0' || 49 strlen(indomain) > YPMAXDOMAIN || inmap == NULL || 50 *inmap == '\0' || strlen(inmap) > YPMAXMAP) 51 return YPERR_BADARGS; 52 53 *outkey = *outval = NULL; 54 *outkeylen = *outvallen = 0; 55 56 again: 57 if (_yp_dobind(indomain, &ysd) != 0) 58 return YPERR_DOMAIN; 59 60 tv.tv_sec = _yplib_timeout; 61 tv.tv_usec = 0; 62 63 yprnk.domain = (char *)indomain; 64 yprnk.map = (char *)inmap; 65 (void)memset(&yprkv, 0, sizeof yprkv); 66 67 r = clnt_call(ysd->dom_client, YPPROC_FIRST, 68 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv); 69 if (r != RPC_SUCCESS) { 70 if (tries++) 71 clnt_perror(ysd->dom_client, "yp_first: clnt_call"); 72 ysd->dom_vers = -1; 73 goto again; 74 } 75 if (!(r = ypprot_err(yprkv.stat))) { 76 *outkeylen = yprkv.key.keydat_len; 77 *outvallen = yprkv.val.valdat_len; 78 if ((*outkey = malloc(*outkeylen + 1)) == NULL || 79 (*outval = malloc(*outvallen + 1)) == NULL) { 80 free(*outkey); 81 r = YPERR_RESRC; 82 } else { 83 (void)memcpy(*outkey, yprkv.key.keydat_val, *outkeylen); 84 (*outkey)[*outkeylen] = '\0'; 85 (void)memcpy(*outval, yprkv.val.valdat_val, *outvallen); 86 (*outval)[*outvallen] = '\0'; 87 } 88 } 89 xdr_free(xdr_ypresp_key_val, (char *) &yprkv); 90 _yp_unbind(ysd); 91 return r; 92 } 93