1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1995, 1996 5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * ypupdate client-side library function. 35 * 36 * Written by Bill Paul <wpaul@ctr.columbia.edu> 37 * Center for Telecommunications Research 38 * Columbia University, New York City 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 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, 132 (xdrproc_t)xdr_ypupdate_args, &upargs, 133 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 134 if (rval == RPC_AUTHERROR) 135 res = YPERR_ACCESS; 136 else 137 res = YPERR_RPC; 138 } 139 140 break; 141 case YPOP_INSERT: 142 upargs.mapname = map; 143 upargs.key.yp_buf_len = keylen; 144 upargs.key.yp_buf_val = key; 145 upargs.datum.yp_buf_len = datalen; 146 upargs.datum.yp_buf_val = data; 147 148 if ((rval = clnt_call(clnt, YPU_INSERT, 149 (xdrproc_t)xdr_ypupdate_args, &upargs, 150 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 151 if (rval == RPC_AUTHERROR) 152 res = YPERR_ACCESS; 153 else 154 res = YPERR_RPC; 155 } 156 157 break; 158 case YPOP_DELETE: 159 delargs.mapname = map; 160 delargs.key.yp_buf_len = keylen; 161 delargs.key.yp_buf_val = key; 162 163 if ((rval = clnt_call(clnt, YPU_DELETE, 164 (xdrproc_t)xdr_ypdelete_args, &delargs, 165 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 166 if (rval == RPC_AUTHERROR) 167 res = YPERR_ACCESS; 168 else 169 res = YPERR_RPC; 170 } 171 172 break; 173 case YPOP_STORE: 174 upargs.mapname = map; 175 upargs.key.yp_buf_len = keylen; 176 upargs.key.yp_buf_val = key; 177 upargs.datum.yp_buf_len = datalen; 178 upargs.datum.yp_buf_val = data; 179 180 if ((rval = clnt_call(clnt, YPU_STORE, 181 (xdrproc_t)xdr_ypupdate_args, &upargs, 182 (xdrproc_t)xdr_u_int, &res, timeout)) != RPC_SUCCESS) { 183 if (rval == RPC_AUTHERROR) 184 res = YPERR_ACCESS; 185 else 186 res = YPERR_RPC; 187 } 188 189 break; 190 default: 191 res = YPERR_BADARGS; 192 break; 193 } 194 195 /* All done: tear down the connection. */ 196 auth_destroy(clnt->cl_auth); 197 clnt_destroy(clnt); 198 free(master); 199 200 return(res); 201 } 202