yp_update.c revision 26213
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 * $Id: yp_update.c,v 1.1 1996/11/16 20:54:57 wpaul Exp $ 39 */ 40 41#include <stdlib.h> 42#include <rpc/rpc.h> 43#include <rpcsvc/yp_prot.h> 44#include <rpcsvc/ypclnt.h> 45#include <rpcsvc/ypupdate_prot.h> 46#include <rpc/key_prot.h> 47 48#ifndef lint 49static const char rcsid[] = "$Id: yp_update.c,v 1.1 1996/11/16 20:54:57 wpaul Exp $"; 50#endif 51 52#ifndef WINDOW 53#define WINDOW (60*60) 54#endif 55 56#ifndef TIMEOUT 57#define TIMEOUT 300 58#endif 59 60int 61yp_update(domain, map, ypop, key, keylen, data, datalen) 62 char *domain; 63 char *map; 64 unsigned int ypop; 65 char *key; 66 int keylen; 67 char *data; 68 int datalen; 69{ 70 char *master; 71 int rval; 72 unsigned int res; 73 struct ypupdate_args upargs; 74 struct ypdelete_args delargs; 75 CLIENT *clnt; 76 char netname[MAXNETNAMELEN+1]; 77 des_block des_key; 78 struct timeval timeout; 79 80 /* Get the master server name for 'domain.' */ 81 if ((rval = yp_master(domain, map, &master))) 82 return(rval); 83 84 /* Check that ypupdated is running there. */ 85 if (getrpcport(master, YPU_PROG, YPU_VERS, ypop)) 86 return(YPERR_DOMAIN); 87 88 /* Get a handle. */ 89 if ((clnt = clnt_create(master, YPU_PROG, YPU_VERS, "tcp")) == NULL) 90 return(YPERR_RPC); 91 92 /* 93 * Assemble netname of server. 94 * NOTE: It's difficult to discern from the documentation, but 95 * when you make a Secure RPC call, the netname you pass should 96 * be the netname of the guy on the other side, not your own 97 * netname. This is how the client side knows what public key 98 * to use for the initial exchange. Passing your own netname 99 * only works if the server on the other side is running under 100 * your UID. 101 */ 102 if (!host2netname(netname, master, domain)) { 103 clnt_destroy(clnt); 104 return(YPERR_BADARGS); 105 } 106 107 /* Make up a DES session key. */ 108 key_gendes(&des_key); 109 110 /* Set up DES authentication. */ 111 if ((clnt->cl_auth = (AUTH *)authdes_create(netname, WINDOW, NULL, 112 &des_key)) == NULL) { 113 clnt_destroy(clnt); 114 return(YPERR_RESRC); 115 } 116 117 /* Set a timeout for clnt_call(). */ 118 timeout.tv_usec = 0; 119 timeout.tv_sec = TIMEOUT; 120 121 /* 122 * Make the call. Note that we use clnt_call() here rather than 123 * the rpcgen-erated client stubs. We could use those stubs, but 124 * then we'd have to do some gymnastics to get at the error 125 * information to figure out what error code to send back to the 126 * caller. With clnt_call(), we get the error status returned to 127 * us right away, and we only have to exert a small amount of 128 * extra effort. 129 */ 130 switch(ypop) { 131 case YPOP_CHANGE: 132 upargs.mapname = map; 133 upargs.key.yp_buf_len = keylen; 134 upargs.key.yp_buf_val = key; 135 upargs.datum.yp_buf_len = datalen; 136 upargs.datum.yp_buf_val = data; 137 138 if ((rval = clnt_call(clnt, YPU_CHANGE, xdr_ypupdate_args, 139 &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 140 if (rval == RPC_AUTHERROR) 141 res = YPERR_ACCESS; 142 else 143 res = YPERR_RPC; 144 } 145 146 break; 147 case YPOP_INSERT: 148 upargs.mapname = map; 149 upargs.key.yp_buf_len = keylen; 150 upargs.key.yp_buf_val = key; 151 upargs.datum.yp_buf_len = datalen; 152 upargs.datum.yp_buf_val = data; 153 154 if ((rval = clnt_call(clnt, YPU_INSERT, xdr_ypupdate_args, 155 &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 156 if (rval == RPC_AUTHERROR) 157 res = YPERR_ACCESS; 158 else 159 res = YPERR_RPC; 160 } 161 162 break; 163 case YPOP_DELETE: 164 delargs.mapname = map; 165 delargs.key.yp_buf_len = keylen; 166 delargs.key.yp_buf_val = key; 167 168 if ((rval = clnt_call(clnt, YPU_DELETE, xdr_ypdelete_args, 169 &delargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 170 if (rval == RPC_AUTHERROR) 171 res = YPERR_ACCESS; 172 else 173 res = YPERR_RPC; 174 } 175 176 break; 177 case YPOP_STORE: 178 upargs.mapname = map; 179 upargs.key.yp_buf_len = keylen; 180 upargs.key.yp_buf_val = key; 181 upargs.datum.yp_buf_len = datalen; 182 upargs.datum.yp_buf_val = data; 183 184 if ((rval = clnt_call(clnt, YPU_STORE, xdr_ypupdate_args, 185 &upargs, xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 186 if (rval == RPC_AUTHERROR) 187 res = YPERR_ACCESS; 188 else 189 res = YPERR_RPC; 190 } 191 192 break; 193 default: 194 res = YPERR_BADARGS; 195 break; 196 } 197 198 /* All done: tear down the connection. */ 199 auth_destroy(clnt->cl_auth); 200 clnt_destroy(clnt); 201 free(master); 202 203 return(res); 204} 205