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 } 201