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 1.7 2003/10/26 03:43:35 peter Exp $
  39  * $DragonFly: src/lib/librpcsvc/yp_update.c,v 1.3 2007/11/25 14:33:02 swildner Exp $
  40  *
  41  */
  42
  43 #include <stdlib.h>
  44 #include <rpc/rpc.h>
  45 #include <rpcsvc/yp_prot.h>
  46 #include <rpcsvc/ypclnt.h>
  47 #include <rpcsvc/ypupdate_prot.h>
  48 #include <rpc/key_prot.h>
  49
  50 #ifndef WINDOW
  51 #define WINDOW (60*60)
  52 #endif
  53
  54 #ifndef TIMEOUT
  55 #define TIMEOUT 300
  56 #endif
  57
  58 int
  59 yp_update(char *domain, char *map, unsigned int ypop, char *key, int keylen,
  60           char *data, int datalen)
  61 {
  62         char *master;
  63         int rval;
  64         unsigned int res;
  65         struct ypupdate_args upargs;
  66         struct ypdelete_args delargs;
  67         CLIENT *clnt;
  68         char netname[MAXNETNAMELEN+1];
  69         des_block des_key;
  70         struct timeval timeout;
  71
  72         /* Get the master server name for 'domain.' */
  73         if ((rval = yp_master(domain, map, &master)))
  74                 return(rval);
  75
  76         /* Check that ypupdated is running there. */
  77         if (getrpcport(master, YPU_PROG, YPU_VERS, ypop))
  78                 return(YPERR_DOMAIN);
  79
  80         /* Get a handle. */
  81         if ((clnt = clnt_create(master, YPU_PROG, YPU_VERS, "tcp")) == NULL)
  82                 return(YPERR_RPC);
  83
  84         /*
  85          * Assemble netname of server.
  86          * NOTE: It's difficult to discern from the documentation, but
  87          * when you make a Secure RPC call, the netname you pass should
  88          * be the netname of the guy on the other side, not your own
  89          * netname. This is how the client side knows what public key
  90          * to use for the initial exchange. Passing your own netname
  91          * only works if the server on the other side is running under
  92          * your UID.
  93          */
  94         if (!host2netname(netname, master, domain)) {
  95                 clnt_destroy(clnt);
  96                 return(YPERR_BADARGS);
  97         }
  98
  99         /* Make up a DES session key. */
 100         key_gendes(&des_key);
 101
 102         /* Set up DES authentication. */
 103         if ((clnt->cl_auth = (AUTH *)authdes_create(netname, WINDOW, NULL,
 104                         &des_key)) == NULL) {
 105                 clnt_destroy(clnt);
 106                 return(YPERR_RESRC);
 107         }
 108
 109         /* Set a timeout for clnt_call(). */
 110         timeout.tv_usec = 0;
 111         timeout.tv_sec = TIMEOUT;
 112
 113         /*
 114          * Make the call. Note that we use clnt_call() here rather than
 115          * the rpcgen-erated client stubs. We could use those stubs, but
 116          * then we'd have to do some gymnastics to get at the error
 117          * information to figure out what error code to send back to the
 118          * caller. With clnt_call(), we get the error status returned to
 119          * us right away, and we only have to exert a small amount of
 120          * extra effort.
 121          */
 122         switch (ypop) {
 123         case YPOP_CHANGE:
 124                 upargs.mapname = map;
 125                 upargs.key.yp_buf_len = keylen;
 126                 upargs.key.yp_buf_val = key;
 127                 upargs.datum.yp_buf_len = datalen;
 128                 upargs.datum.yp_buf_val = data;
 129
 130                 if ((rval = clnt_call(clnt, YPU_CHANGE,
 131                         (xdrproc_t)xdr_ypupdate_args, &upargs,
 132                         (xdrproc_t)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,
 148                         (xdrproc_t)xdr_ypupdate_args, &upargs,
 149                         (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 150                         if (rval == RPC_AUTHERROR)
 151                                 res = YPERR_ACCESS;
 152                         else
 153                                 res = YPERR_RPC;
 154                 }
 155
 156                 break;
 157         case YPOP_DELETE:
 158                 delargs.mapname = map;
 159                 delargs.key.yp_buf_len = keylen;
 160                 delargs.key.yp_buf_val = key;
 161
 162                 if ((rval = clnt_call(clnt, YPU_DELETE,
 163                         (xdrproc_t)xdr_ypdelete_args, &delargs,
 164                         (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 165                         if (rval == RPC_AUTHERROR)
 166                                 res = YPERR_ACCESS;
 167                         else
 168                                 res = YPERR_RPC;
 169                 }
 170
 171                 break;
 172         case YPOP_STORE:
 173                 upargs.mapname = map;
 174                 upargs.key.yp_buf_len = keylen;
 175                 upargs.key.yp_buf_val = key;
 176                 upargs.datum.yp_buf_len = datalen;
 177                 upargs.datum.yp_buf_val = data;
 178
 179                 if ((rval = clnt_call(clnt, YPU_STORE,
 180                         (xdrproc_t)xdr_ypupdate_args, &upargs,
 181                         (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) {
 182                         if (rval == RPC_AUTHERROR)
 183                                 res = YPERR_ACCESS;
 184                         else
 185                                 res = YPERR_RPC;
 186                 }
 187
 188                 break;
 189         default:
 190                 res = YPERR_BADARGS;
 191                 break;
 192         }
 193
 194         /* All done: tear down the connection. */
 195         auth_destroy(clnt->cl_auth);
 196         clnt_destroy(clnt);
 197         free(master);
 198
 199         return(res);
 200 }