2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1996, 1997
5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
36 * Copyright (c) 2009, Sun Microsystems, Inc.
37 * All rights reserved.
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions are met:
41 * - Redistributions of source code must retain the above copyright notice,
42 * this list of conditions and the following disclaimer.
43 * - Redistributions in binary form must reproduce the above copyright notice,
44 * this list of conditions and the following disclaimer in the documentation
45 * and/or other materials provided with the distribution.
46 * - Neither the name of Sun Microsystems, Inc. nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
51 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
54 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
55 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
56 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
57 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
58 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
59 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
60 * POSSIBILITY OF SUCH DAMAGE.
63 * clnt_udp.c, Implements a UDP/IP based, client side RPC.
65 * Copyright (C) 1984, Sun Microsystems, Inc.
76 #include <rpc/pmap_clnt.h>
77 #include <rpc/pmap_prot.h>
78 #include <rpcsvc/yp.h>
79 #include <sys/types.h>
81 #include <sys/socket.h>
82 #include <sys/signal.h>
83 #include <sys/ioctl.h>
84 #include <arpa/inet.h>
91 * Client interface to pmap rpc service.
93 * Copyright (C) 1984, Sun Microsystems, Inc.
97 static struct timeval timeout = { 1, 0 };
98 static struct timeval tottimeout = { 1, 0 };
101 * Find the mapped port for program,version.
102 * Calls the pmap service remotely to do the lookup.
103 * Returns 0 if no map exists.
106 __pmap_getport(struct sockaddr_in *address, u_long program, u_long version,
111 register CLIENT *client;
114 address->sin_port = htons(PMAPPORT);
116 client = clntudp_bufcreate(address, PMAPPROG,
117 PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
118 if (client != (CLIENT *)NULL) {
119 parms.pm_prog = program;
120 parms.pm_vers = version;
121 parms.pm_prot = protocol;
122 parms.pm_port = 0; /* not needed or used */
123 if (CLNT_CALL(client, PMAPPROC_GETPORT,
124 (xdrproc_t)xdr_pmap, &parms,
125 (xdrproc_t)xdr_u_short, &port,
126 tottimeout) != RPC_SUCCESS){
127 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
128 clnt_geterr(client, &rpc_createerr.cf_error);
129 } else if (port == 0) {
130 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
132 CLNT_DESTROY(client);
136 address->sin_port = 0;
141 * Transmit to YPPROC_DOMAIN_NONACK, return immediately.
144 ypproc_domain_nonack_2_send(domainname *argp, CLIENT *clnt)
146 static bool_t clnt_res;
147 struct timeval TIMEOUT = { 0, 0 };
149 memset((char *)&clnt_res, 0, sizeof (clnt_res));
150 if (clnt_call(clnt, YPPROC_DOMAIN_NONACK,
151 (xdrproc_t) xdr_domainname, (caddr_t) argp,
152 (xdrproc_t) xdr_bool, (caddr_t) &clnt_res,
153 TIMEOUT) != RPC_SUCCESS) {
160 * Receive response from YPPROC_DOMAIN_NONACK asynchronously.
163 ypproc_domain_nonack_2_recv(domainname *argp, CLIENT *clnt)
165 static bool_t clnt_res;
166 struct timeval TIMEOUT = { 0, 0 };
168 memset((char *)&clnt_res, 0, sizeof (clnt_res));
169 if (clnt_call(clnt, YPPROC_DOMAIN_NONACK,
170 (xdrproc_t) NULL, (caddr_t) argp,
171 (xdrproc_t) xdr_bool, (caddr_t) &clnt_res,
172 TIMEOUT) != RPC_SUCCESS) {
179 * "We have the machine that goes 'ping!'" -- Monty Python
181 * This function blasts packets at the YPPROC_DOMAIN_NONACK procedures
182 * of the NIS servers listed in restricted_addrs structure.
183 * Whoever replies the fastest becomes our chosen server.
185 * Note: THIS IS NOT A BROADCAST OPERATION! We could use clnt_broadcast()
186 * for this, but that has the following problems:
187 * - We only get the address of the machine that replied in the
188 * 'eachresult' callback, and on multi-homed machines this can
190 * - clnt_broadcast() only transmits to local networks, whereas with
191 * NIS+ you can have a perfectly good server located anywhere on or
192 * off the local network.
193 * - clnt_broadcast() blocks for an arbitrary amount of time which the
194 * caller can't control -- we want to avoid that.
196 * Also note that this has nothing to do with the NIS_PING procedure used
197 * for replica updates.
201 struct sockaddr_in sin;
206 __yp_ping(struct in_addr *restricted_addrs, int cnt, char *dom, short *port)
208 struct timeval tv = { 5, 0 };
209 struct ping_req **reqs;
212 struct sockaddr_in sin, *any = NULL;
215 u_int32_t xid_seed, xid_lookup;
216 int sock, dontblock = 1;
221 /* Set up handles. */
222 reqs = calloc(cnt, sizeof(struct ping_req *));
223 xid_seed = time(NULL) ^ getpid();
225 for (i = 0; i < cnt; i++) {
226 bzero((char *)&sin, sizeof(sin));
227 sin.sin_family = AF_INET;
228 bcopy((char *)&restricted_addrs[i],
229 (char *)&sin.sin_addr, sizeof(struct in_addr));
230 sin.sin_port = htons(__pmap_getport(&sin, YPPROG,
231 YPVERS, IPPROTO_UDP));
232 if (sin.sin_port == 0)
234 reqs[i] = calloc(1, sizeof(struct ping_req));
235 bcopy((char *)&sin, (char *)&reqs[i]->sin, sizeof(sin));
237 reqs[i]->xid = xid_seed;
242 /* Make sure at least one server was assigned */
248 /* Create RPC handle */
249 sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
250 clnt = clntudp_create(any, YPPROG, YPVERS, tv, &sock);
253 for (i = 0; i < cnt; i++)
259 clnt->cl_auth = authunix_create_default();
262 clnt_control(clnt, CLSET_TIMEOUT, (char *)&tv);
264 clnt_control(clnt, CLSET_ASYNC, (char *)&async);
265 ioctl(sock, FIONBIO, &dontblock);
268 for (i = 0; i < cnt; i++) {
269 if (reqs[i] != NULL) {
270 clnt_control(clnt, CLSET_XID, (char *)&reqs[i]->xid);
271 addr.len = sizeof(reqs[i]->sin);
272 addr.buf = (char *) &reqs[i]->sin;
273 clnt_control(clnt, CLSET_SVC_ADDR, &addr);
274 ypproc_domain_nonack_2_send(&foo, clnt);
279 ypproc_domain_nonack_2_recv(&foo, clnt);
281 /* Got a winner -- look him up. */
282 clnt_control(clnt, CLGET_XID, (char *)&xid_lookup);
283 for (i = 0; i < cnt; i++) {
284 if (reqs[i] != NULL && reqs[i]->xid == xid_lookup) {
286 *port = reqs[i]->sin.sin_port;
290 /* Shut everything down */
291 auth_destroy(clnt->cl_auth);
295 for (i = 0; i < cnt; i++)