nis.subproj/yp_first.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
  26  * All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by Theo de Raadt.
  39  * 4. The name of the author may not be used to endorse or promote products
  40  *    derived from this software without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  43  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  44  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  46  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  */
  54
  55 #if defined(LIBC_SCCS) && !defined(lint)
  56 static char *rcsid = "$OpenBSD: yp_first.c,v 1.5 1996/12/03 08:20:03 deraadt Exp $";
  57 #endif /* LIBC_SCCS and not lint */
  58
  59 #include <sys/param.h>
  60 #include <sys/types.h>
  61 #include <sys/socket.h>
  62 #include <sys/file.h>
  63 #include <sys/uio.h>
  64 #include <errno.h>
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69 #include <rpc/rpc.h>
  70 #include <rpc/xdr.h>
  71 #include <rpcsvc/yp.h>
  72 #include <rpcsvc/ypclnt.h>
  73 #include "ypinternal.h"
  74
  75 int
  76 yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen)
  77         const char     *indomain;
  78         const char     *inmap;
  79         char          **outkey;
  80         int            *outkeylen;
  81         char          **outval;
  82         int            *outvallen;
  83 {
  84         struct ypresp_key_val yprkv;
  85         struct ypreq_nokey yprnk;
  86         struct dom_binding *ysd;
  87         struct timeval  tv;
  88         int tries = 0, r;
  89         static int proto = YP_BIND_UDP;
  90
  91         if (indomain == NULL || *indomain == '\0' ||
  92             strlen(indomain) > YPMAXDOMAIN || inmap == NULL ||
  93             *inmap == '\0' || strlen(inmap) > YPMAXMAP)
  94                 return YPERR_BADARGS;
  95
  96         *outkey = *outval = NULL;
  97         *outkeylen = *outvallen = 0;
  98
  99 again:
 100         if (_yp_dobind(indomain, &ysd) != 0)
 101                 return YPERR_DOMAIN;
 102
 103         tv.tv_sec = _yplib_timeout;
 104         tv.tv_usec = 0;
 105
 106         yprnk.domain = (char *)indomain;
 107         yprnk.map = (char *)inmap;
 108         (void)memset(&yprkv, 0, sizeof yprkv);
 109
 110         r = clnt_call(ysd->dom_client, YPPROC_FIRST, (xdrproc_t)xdr_ypreq_nokey, &yprnk, (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
 111         if (r != RPC_SUCCESS)
 112         {
 113                 if (tries++) clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 114
 115                 if (proto == YP_BIND_UDP) proto = YP_BIND_TCP;
 116                 else proto = YP_BIND_UDP;
 117                 ysd->dom_vers = proto;
 118
 119                 goto again;
 120         }
 121
 122         if (!(r = ypprot_err(yprkv.stat))) {
 123                 *outkeylen = yprkv.key.keydat_len;
 124                 if ((*outkey = malloc(*outkeylen + 1)) == NULL)
 125                         r = YPERR_RESRC;
 126                 else {
 127                         (void)memcpy(*outkey, yprkv.key.keydat_val, *outkeylen);
 128                         (*outkey)[*outkeylen] = '\0';
 129                 }
 130                 *outvallen = yprkv.val.valdat_len;
 131                 if ((*outval = malloc(*outvallen + 1)) == NULL)
 132                         r = YPERR_RESRC;
 133                 else {
 134                         (void)memcpy(*outval, yprkv.val.valdat_val, *outvallen);
 135                         (*outval)[*outvallen] = '\0';
 136                 }
 137         }
 138         xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *) &yprkv);
 139         _yp_unbind(ysd);
 140         return r;
 141 }