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/* $OpenBSD: yp_first.c,v 1.11 2015/09/13 20:57:28 guenther Exp $ */ |
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/* |
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* Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/types.h> |
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#include <limits.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <rpc/rpc.h> |
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#include <rpc/xdr.h> |
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#include <rpcsvc/yp.h> |
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#include <rpcsvc/ypclnt.h> |
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#include "ypinternal.h" |
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int |
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yp_first(const char *indomain, const char *inmap, char **outkey, int *outkeylen, |
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char **outval, int *outvallen) |
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{ |
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struct ypresp_key_val yprkv; |
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struct ypreq_nokey yprnk; |
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struct dom_binding *ysd; |
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struct timeval tv; |
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int tries = 0, r; |
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if (indomain == NULL || *indomain == '\0' || |
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strlen(indomain) > YPMAXDOMAIN || inmap == NULL || |
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*inmap == '\0' || strlen(inmap) > YPMAXMAP) |
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return YPERR_BADARGS; |
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*outkey = *outval = NULL; |
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*outkeylen = *outvallen = 0; |
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again: |
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if (_yp_dobind(indomain, &ysd) != 0) |
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return YPERR_DOMAIN; |
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tv.tv_sec = _yplib_timeout; |
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tv.tv_usec = 0; |
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yprnk.domain = (char *)indomain; |
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yprnk.map = (char *)inmap; |
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(void)memset(&yprkv, 0, sizeof yprkv); |
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r = clnt_call(ysd->dom_client, YPPROC_FIRST, |
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xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv); |
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if (r != RPC_SUCCESS) { |
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if (tries++) |
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clnt_perror(ysd->dom_client, "yp_first: clnt_call"); |
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ysd->dom_vers = -1; |
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goto again; |
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} |
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if (!(r = ypprot_err(yprkv.stat))) { |
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*outkeylen = yprkv.key.keydat_len; |
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*outvallen = yprkv.val.valdat_len; |
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if ((*outkey = malloc(*outkeylen + 1)) == NULL || |
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(*outval = malloc(*outvallen + 1)) == NULL) { |
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free(*outkey); |
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r = YPERR_RESRC; |
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} else { |
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(void)memcpy(*outkey, yprkv.key.keydat_val, *outkeylen); |
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(*outkey)[*outkeylen] = '\0'; |
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(void)memcpy(*outval, yprkv.val.valdat_val, *outvallen); |
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(*outval)[*outvallen] = '\0'; |
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} |
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} |
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xdr_free(xdr_ypresp_key_val, (char *) &yprkv); |
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_yp_unbind(ysd); |
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return r; |
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} |
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DEF_WEAK(yp_first); |