2 * Copyright (c) 1996, 1997
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
34 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
35 * unrestricted use provided that this legend is included on all tape
36 * media and as a part of the software program in whole or part. Users
37 * may copy or modify Sun RPC without charge, but are not authorized
38 * to license or distribute it to anyone else except as part of a product or
39 * program developed by the user.
41 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
42 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
45 * Sun RPC is provided with no support and without any obligation on the
46 * part of Sun Microsystems, Inc. to assist in its use, correction,
47 * modification or enhancement.
49 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
50 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
51 * OR ANY PART THEREOF.
53 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
54 * or profits or other special, indirect and consequential damages, even if
55 * Sun has been advised of the possibility of such damages.
57 * Sun Microsystems, Inc.
59 * Mountain View, California 94043
64 static char *sccsid = "@(#)from: clnt_udp.c 1.39 87/08/11 Copyr 1984 Sun Micro";
65 static char *sccsid = "@(#)from: clnt_udp.c 2.2 88/08/01 4.0 RPCSRC";
67 static const char rcsid[] =
72 * clnt_udp.c, Implements a UDP/IP based, client side RPC.
74 * Copyright (C) 1984, Sun Microsystems, Inc.
85 #include <rpc/pmap_clnt.h>
86 #include <rpc/pmap_prot.h>
87 #include <rpcsvc/yp.h>
88 #include <sys/types.h>
90 #include <sys/socket.h>
91 #include <sys/signal.h>
92 #include <sys/ioctl.h>
98 int cu_fd; /* connections fd */
99 bool_t cu_closeit; /* opened by library */
100 struct sockaddr_storage cu_raddr; /* remote address */
102 struct timeval cu_wait; /* retransmit interval */
103 struct timeval cu_total; /* total time for the call */
104 struct rpc_err cu_error;
107 u_int cu_sendsz; /* send size */
109 u_int cu_recvsz; /* recv size */
117 * Client interface to pmap rpc service.
119 * Copyright (C) 1984, Sun Microsystems, Inc.
123 static struct timeval timeout = { 1, 0 };
124 static struct timeval tottimeout = { 1, 0 };
127 * Find the mapped port for program,version.
128 * Calls the pmap service remotely to do the lookup.
129 * Returns 0 if no map exists.
132 __pmap_getport(address, program, version, protocol)
133 struct sockaddr_in *address;
140 register CLIENT *client;
143 address->sin_port = htons(PMAPPORT);
145 client = clntudp_bufcreate(address, PMAPPROG,
146 PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
147 if (client != (CLIENT *)NULL) {
148 parms.pm_prog = program;
149 parms.pm_vers = version;
150 parms.pm_prot = protocol;
151 parms.pm_port = 0; /* not needed or used */
152 if (CLNT_CALL(client, PMAPPROC_GETPORT, xdr_pmap, &parms,
153 xdr_u_short, &port, tottimeout) != RPC_SUCCESS){
154 rpc_createerr.cf_stat = RPC_PMAPFAILURE;
155 clnt_geterr(client, &rpc_createerr.cf_error);
156 } else if (port == 0) {
157 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
159 CLNT_DESTROY(client);
163 address->sin_port = 0;
168 * Transmit to YPPROC_DOMAIN_NONACK, return immediately.
171 ypproc_domain_nonack_2_send(domainname *argp, CLIENT *clnt)
173 static bool_t clnt_res;
174 struct timeval TIMEOUT = { 0, 0 };
176 memset((char *)&clnt_res, 0, sizeof (clnt_res));
177 if (clnt_call(clnt, YPPROC_DOMAIN_NONACK,
178 (xdrproc_t) xdr_domainname, (caddr_t) argp,
179 (xdrproc_t) xdr_bool, (caddr_t) &clnt_res,
180 TIMEOUT) != RPC_SUCCESS) {
187 * Receive response from YPPROC_DOMAIN_NONACK asynchronously.
190 ypproc_domain_nonack_2_recv(domainname *argp, CLIENT *clnt)
192 static bool_t clnt_res;
193 struct timeval TIMEOUT = { 0, 0 };
195 memset((char *)&clnt_res, 0, sizeof (clnt_res));
196 if (clnt_call(clnt, YPPROC_DOMAIN_NONACK,
197 (xdrproc_t) NULL, (caddr_t) argp,
198 (xdrproc_t) xdr_bool, (caddr_t) &clnt_res,
199 TIMEOUT) != RPC_SUCCESS) {
206 * "We have the machine that goes 'ping!'" -- Monty Python
208 * This function blasts packets at the YPPROC_DOMAIN_NONACK procedures
209 * of the NIS servers listed in restricted_addrs structure.
210 * Whoever replies the fastest becomes our chosen server.
212 * Note: THIS IS NOT A BROADCAST OPERATION! We could use clnt_broadcast()
213 * for this, but that has the following problems:
214 * - We only get the address of the machine that replied in the
215 * 'eachresult' callback, and on multi-homed machines this can
217 * - clnt_broadcast() only transmits to local networks, whereas with
218 * NIS+ you can have a perfectly good server located anywhere on or
219 * off the local network.
220 * - clnt_broadcast() blocks for an arbitrary amount of time which the
221 * caller can't control -- we want to avoid that.
223 * Also note that this has nothing to do with the NIS_PING procedure used
224 * for replica updates.
228 struct sockaddr_in sin;
232 int __yp_ping(restricted_addrs, cnt, dom, port)
233 struct in_addr *restricted_addrs;
238 struct timeval tv = { 5 , 0 };
239 struct ping_req **reqs;
242 struct sockaddr_in sin, *any = NULL;
244 time_t xid_seed, xid_lookup;
245 int sock, dontblock = 1;
251 /* Set up handles. */
252 reqs = calloc(1, sizeof(struct ping_req *) * cnt);
253 xid_seed = time(NULL) ^ getpid();
255 for (i = 0; i < cnt; i++) {
256 bzero((char *)&sin, sizeof(sin));
257 sin.sin_family = AF_INET;
258 bcopy((char *)&restricted_addrs[i],
259 (char *)&sin.sin_addr, sizeof(struct in_addr));
260 sin.sin_port = htons(__pmap_getport(&sin, YPPROG,
261 YPVERS, IPPROTO_UDP));
262 if (sin.sin_port == 0)
264 reqs[i] = calloc(1, sizeof(struct ping_req));
265 bcopy((char *)&sin, (char *)&reqs[i]->sin, sizeof(sin));
267 reqs[i]->xid = xid_seed;
272 /* Make sure at least one server was assigned */
278 /* Create RPC handle */
279 sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
280 clnt = clntudp_create(any, YPPROG, YPVERS, tv, &sock);
283 for (i = 0; i < cnt; i++)
289 clnt->cl_auth = authunix_create_default();
290 cu = (struct cu_data *)clnt->cl_private;
293 clnt_control(clnt, CLSET_TIMEOUT, (char *)&tv);
295 clnt_control(clnt, CLSET_ASYNC, (char *)&async);
296 ioctl(sock, FIONBIO, &dontblock);
299 for (i = 0; i < cnt; i++) {
300 if (reqs[i] != NULL) {
301 clnt_control(clnt, CLSET_XID, (char *)&reqs[i]->xid);
302 bcopy((char *)&reqs[i]->sin, (char *)&cu->cu_raddr,
303 sizeof(struct sockaddr_in));
304 ypproc_domain_nonack_2_send(&foo, clnt);
309 ypproc_domain_nonack_2_recv(&foo, clnt);
311 /* Got a winner -- look him up. */
312 clnt_control(clnt, CLGET_XID, (char *)&xid_lookup);
313 for (i = 0; i < cnt; i++) {
314 if (reqs[i] != NULL && reqs[i]->xid == xid_lookup) {
316 *port = reqs[i]->sin.sin_port;
320 /* Shut everything down */
321 auth_destroy(clnt->cl_auth);
325 for (i = 0; i < cnt; i++)