lib/librpcsvc/yp_update.c

   1 /*
   2  * Copyright (c) 1995, 1996
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * ypupdate client-side library function.
  33  *
  34  * Written by Bill Paul <wpaul@ctr.columbia.edu>
  35  * Center for Telecommunications Research
  36  * Columbia University, New York City
  37  *
  38  * $FreeBSD: src/lib/librpcsvc/yp_update.c,v 1.2.2.1 2002/02/15 00:46:54 des Exp $
  39  * $DragonFly: src/lib/librpcsvc/yp_update.c,v 1.2 2003/06/17 06:26:51 dillon Exp $
  40  *
  41  * $FreeBSD: src/lib/librpcsvc/yp_update.c,v 1.2.2.1 2002/02/15 00:46:54 des Exp $
  42  */
  43
  44 #include <stdlib.h>
  45 #include <rpc/rpc.h>
  46 #include <rpcsvc/yp_prot.h>
  47 #include <rpcsvc/ypclnt.h>
  48 #include <rpcsvc/ypupdate_prot.h>
  49 #include <rpc/key_prot.h>
  50
  51 #ifndef WINDOW
  52 #define WINDOW (60*60)
  53 #endif
  54
  55 #ifndef TIMEOUT
  56 #define TIMEOUT 300
  57 #endif
  58
  59 int
  60 yp_update(domain, map, ypop, key, keylen, data, datalen)
  61         char            *domain;
  62         char            *map;
  63         unsigned int    ypop;
  64         char            *key;
  65         int             keylen;
  66         char            *data;
  67         int             datalen;
  68 {
  69         char *master;
  70         int rval;
  71         unsigned int res;
  72         struct ypupdate_args upargs;
  73         struct ypdelete_args delargs;
  74         CLIENT *clnt;
  75         char netname[MAXNETNAMELEN+1];
  76         des_block des_key;
  77         struct timeval timeout;
  78
  79         /* Get the master server name for 'domain.' */
  80         if ((rval = yp_master(domain, map, &master)))
  81                 return(rval);
  82
  83         /* Check that ypupdated is running there. */
  84         if (getrpcport(master, YPU_PROG, YPU_VERS, ypop))
  85                 return(YPERR_DOMAIN);
  86
  87         /* Get a handle. */
  88         if ((clnt = clnt_create(master, YPU_PROG, YPU_VERS, "tcp")) == NULL)
  89                 return(YPERR_RPC);
  90
  91         /*
  92          * Assemble netname of server.
  93          * NOTE: It's difficult to discern from the documentation, but
  94          * when you make a Secure RPC call, the netname you pass should
  95          * be the netname of the guy on the other side, not your own
  96          * netname. This is how the client side knows what public key
  97          * to use for the initial exchange. Passing your own netname
  98          * only works if the server on the other side is running under
  99          * your UID.
 100          */
 101         if (!host2netname(netname, master, domain)) {
 102                 clnt_destroy(clnt);
 103                 return(YPERR_BADARGS);
 104         }
 105
 106         /* Make up a DES session key. */
 107         key_gendes(&des_key);
 108
 109         /* Set up DES authentication. */
 110         if ((clnt->cl_auth = (AUTH *)authdes_create(netname, WINDOW, NULL,
 111                         &des_key)) == NULL) {
 112                 clnt_destroy(clnt);
 113                 return(YPERR_RESRC);
 114         }
 115
 116         /* Set a timeout for clnt_call(). */
 117         timeout.tv_usec = 0;
 118         timeout.tv_sec = TIMEOUT;
 119
 120         /*
 121          * Make the call. Note that we use clnt_call() here rather than
 122          * the rpcgen-erated client stubs. We could use those stubs, but
 123          * then we'd have to do some gymnastics to get at the error
 124          * information to figure out what error code to send back to the
 125          * caller. With clnt_call(), we get the error status returned to
 126          * us right away, and we only have to exert a small amount of
 127          * extra effort.
 128          */
 129         switch (ypop) {
 130         case YPOP_CHANGE:
 131                 upargs.mapname = map;
 132                 upargs.key.yp_buf_len = keylen;
 133                 upargs.key.yp_buf_val = key;
 134                 upargs.datum.yp_buf_len = datalen;
 135                 upargs.datum.yp_buf_val = data;
 136
 137                 if ((rval = clnt_call(clnt, YPU_CHANGE, xdr_ypupdate_args,
 138                         &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 139                         if (rval == RPC_AUTHERROR)
 140                                 res = YPERR_ACCESS;
 141                         else
 142                                 res = YPERR_RPC;
 143                 }
 144
 145                 break;
 146         case YPOP_INSERT:
 147                 upargs.mapname = map;
 148                 upargs.key.yp_buf_len = keylen;
 149                 upargs.key.yp_buf_val = key;
 150                 upargs.datum.yp_buf_len = datalen;
 151                 upargs.datum.yp_buf_val = data;
 152
 153                 if ((rval = clnt_call(clnt, YPU_INSERT, xdr_ypupdate_args,
 154                         &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 155                         if (rval == RPC_AUTHERROR)
 156                                 res = YPERR_ACCESS;
 157                         else
 158                                 res = YPERR_RPC;
 159                 }
 160
 161                 break;
 162         case YPOP_DELETE:
 163                 delargs.mapname = map;
 164                 delargs.key.yp_buf_len = keylen;
 165                 delargs.key.yp_buf_val = key;
 166
 167                 if ((rval = clnt_call(clnt, YPU_DELETE, xdr_ypdelete_args,
 168                         &delargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 169                         if (rval == RPC_AUTHERROR)
 170                                 res = YPERR_ACCESS;
 171                         else
 172                                 res = YPERR_RPC;
 173                 }
 174
 175                 break;
 176         case YPOP_STORE:
 177                 upargs.mapname = map;
 178                 upargs.key.yp_buf_len = keylen;
 179                 upargs.key.yp_buf_val = key;
 180                 upargs.datum.yp_buf_len = datalen;
 181                 upargs.datum.yp_buf_val = data;
 182
 183                 if ((rval = clnt_call(clnt, YPU_STORE, xdr_ypupdate_args,
 184                         &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 185                         if (rval == RPC_AUTHERROR)
 186                                 res = YPERR_ACCESS;
 187                         else
 188                                 res = YPERR_RPC;
 189                 }
 190
 191                 break;
 192         default:
 193                 res = YPERR_BADARGS;
 194                 break;
 195         }
 196
 197         /* All done: tear down the connection. */
 198         auth_destroy(clnt->cl_auth);
 199         clnt_destroy(clnt);
 200         free(master);
 201
 202         return(res);
 203 }