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 1.3 2007/11/25 14:33:02 swildner 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(char *domain, char *map, unsigned int ypop, char *key, int keylen,
  61           char *data, int datalen)
  62 {
  63         char *master;
  64         int rval;
  65         unsigned int res;
  66         struct ypupdate_args upargs;
  67         struct ypdelete_args delargs;
  68         CLIENT *clnt;
  69         char netname[MAXNETNAMELEN+1];
  70         des_block des_key;
  71         struct timeval timeout;
  72
  73         /* Get the master server name for 'domain.' */
  74         if ((rval = yp_master(domain, map, &master)))
  75                 return(rval);
  76
  77         /* Check that ypupdated is running there. */
  78         if (getrpcport(master, YPU_PROG, YPU_VERS, ypop))
  79                 return(YPERR_DOMAIN);
  80
  81         /* Get a handle. */
  82         if ((clnt = clnt_create(master, YPU_PROG, YPU_VERS, "tcp")) == NULL)
  83                 return(YPERR_RPC);
  84
  85         /*
  86          * Assemble netname of server.
  87          * NOTE: It's difficult to discern from the documentation, but
  88          * when you make a Secure RPC call, the netname you pass should
  89          * be the netname of the guy on the other side, not your own
  90          * netname. This is how the client side knows what public key
  91          * to use for the initial exchange. Passing your own netname
  92          * only works if the server on the other side is running under
  93          * your UID.
  94          */
  95         if (!host2netname(netname, master, domain)) {
  96                 clnt_destroy(clnt);
  97                 return(YPERR_BADARGS);
  98         }
  99
 100         /* Make up a DES session key. */
 101         key_gendes(&des_key);
 102
 103         /* Set up DES authentication. */
 104         if ((clnt->cl_auth = (AUTH *)authdes_create(netname, WINDOW, NULL,
 105                         &des_key)) == NULL) {
 106                 clnt_destroy(clnt);
 107                 return(YPERR_RESRC);
 108         }
 109
 110         /* Set a timeout for clnt_call(). */
 111         timeout.tv_usec = 0;
 112         timeout.tv_sec = TIMEOUT;
 113
 114         /*
 115          * Make the call. Note that we use clnt_call() here rather than
 116          * the rpcgen-erated client stubs. We could use those stubs, but
 117          * then we'd have to do some gymnastics to get at the error
 118          * information to figure out what error code to send back to the
 119          * caller. With clnt_call(), we get the error status returned to
 120          * us right away, and we only have to exert a small amount of
 121          * extra effort.
 122          */
 123         switch (ypop) {
 124         case YPOP_CHANGE:
 125                 upargs.mapname = map;
 126                 upargs.key.yp_buf_len = keylen;
 127                 upargs.key.yp_buf_val = key;
 128                 upargs.datum.yp_buf_len = datalen;
 129                 upargs.datum.yp_buf_val = data;
 130
 131                 if ((rval = clnt_call(clnt, YPU_CHANGE, xdr_ypupdate_args,
 132                         &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 133                         if (rval == RPC_AUTHERROR)
 134                                 res = YPERR_ACCESS;
 135                         else
 136                                 res = YPERR_RPC;
 137                 }
 138
 139                 break;
 140         case YPOP_INSERT:
 141                 upargs.mapname = map;
 142                 upargs.key.yp_buf_len = keylen;
 143                 upargs.key.yp_buf_val = key;
 144                 upargs.datum.yp_buf_len = datalen;
 145                 upargs.datum.yp_buf_val = data;
 146
 147                 if ((rval = clnt_call(clnt, YPU_INSERT, xdr_ypupdate_args,
 148                         &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 149                         if (rval == RPC_AUTHERROR)
 150                                 res = YPERR_ACCESS;
 151                         else
 152                                 res = YPERR_RPC;
 153                 }
 154
 155                 break;
 156         case YPOP_DELETE:
 157                 delargs.mapname = map;
 158                 delargs.key.yp_buf_len = keylen;
 159                 delargs.key.yp_buf_val = key;
 160
 161                 if ((rval = clnt_call(clnt, YPU_DELETE, xdr_ypdelete_args,
 162                         &delargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 163                         if (rval == RPC_AUTHERROR)
 164                                 res = YPERR_ACCESS;
 165                         else
 166                                 res = YPERR_RPC;
 167                 }
 168
 169                 break;
 170         case YPOP_STORE:
 171                 upargs.mapname = map;
 172                 upargs.key.yp_buf_len = keylen;
 173                 upargs.key.yp_buf_val = key;
 174                 upargs.datum.yp_buf_len = datalen;
 175                 upargs.datum.yp_buf_val = data;
 176
 177                 if ((rval = clnt_call(clnt, YPU_STORE, xdr_ypupdate_args,
 178                         &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 179                         if (rval == RPC_AUTHERROR)
 180                                 res = YPERR_ACCESS;
 181                         else
 182                                 res = YPERR_RPC;
 183                 }
 184
 185                 break;
 186         default:
 187                 res = YPERR_BADARGS;
 188                 break;
 189         }
 190
 191         /* All done: tear down the connection. */
 192         auth_destroy(clnt->cl_auth);
 193         clnt_destroy(clnt);
 194         free(master);
 195
 196         return(res);
 197 }