[unix-history] / usr / src / new / sunrpc / portmap.c

#ifndef lint
static	char sccsid[] = "@(#)portmap.c 1.2 85/03/13 Copyr 1984 Sun Micro";
#endif

/*
 * Copyright (c) 1984 by Sun Microsystems, Inc.
 */

/*
 * portmap.c, Implements the program,version to port number mapping for
 * rpc.
 */

/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <stdio.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/ioctl.h>

char *malloc();
int reg_service();
static int debugging = 0;

main()
{
	SVCXPRT *xprt;
	int sock, pid, t;
	struct sockaddr_in addr;
	int len = sizeof(struct sockaddr_in);

#ifndef DEBUG
	pid = fork();
	if (pid < 0) {
		perror("portmap: fork");
		exit(1);
	}
	if (pid != 0)
		exit(0);
	for (t = 0; t < 20; t++)
		close(t);
 	open("/", 0);
 	dup2(0, 1);
 	dup2(0, 2);
 	t = open("/dev/tty", 2);
 	if (t >= 0) {
 		ioctl(t, TIOCNOTTY, (char *)0);
 		close(t);
 	}
#endif
	if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
		perror("portmap cannot create socket");
		exit(1);
	}

	addr.sin_addr.s_addr = 0;
	addr.sin_family = AF_INET;
	addr.sin_port = htons(PMAPPORT);
	if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
		perror("portmap cannot bind");
		exit(1);
	}

	if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) {
		fprintf(stderr, "couldn't do udp_create\n");
		exit(1);
	}

	if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
		perror("portmap cannot create socket");
		exit(1);
	}
	if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
		perror("portmap cannot bind");
		exit(1);
	}
	if ((xprt = svctcp_create(sock, 0, 0)) == (SVCXPRT *)NULL) {
		fprintf(stderr, "couldn't do tcp_create\n");
		exit(1);
	}

        (void)svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE);
	svc_run();
	fprintf(stderr, "run_svc returned unexpectedly\n");
	abort();
}

struct pmaplist *pmaplist;

static struct pmaplist *
find_service(prog, vers, prot)
	u_long prog;
	u_long vers;
{
	register struct pmaplist *hit = NULL;
	register struct pmaplist *pml;

	for (pml = pmaplist; pml != NULL; pml = pml->pml_next) {
		if ((pml->pml_map.pm_prog != prog) ||
			(pml->pml_map.pm_prot != prot))
			continue;
		hit = pml;
		if (pml->pml_map.pm_vers == vers)
		    break;
	}
	return (hit);
}

/* 
 * 1 OK, 0 not
 */
reg_service(rqstp, xprt)
	struct svc_req *rqstp;
	SVCXPRT *xprt;
{
	struct pmap reg;
	struct pmaplist *pml, *prevpml, *fnd;
	int ans, port;
	caddr_t t;
	
#ifdef DEBUG
	fprintf(stderr, "server: about do a switch\n");
#endif
	switch (rqstp->rq_proc) {

	case PMAPPROC_NULL:
		/*
		 * Null proc call
		 */
		if ((!svc_sendreply(xprt, xdr_void, NULL)) && debugging) {
			abort();
		}
		break;

	case PMAPPROC_SET:
		/*
		 * Set a program,version to port mapping
		 */
		if (!svc_getargs(xprt, xdr_pmap, &reg))
			svcerr_decode(xprt);
		else {
			/*
			 * check to see if already used
			 * find_service returns a hit even if
			 * the versions don't match, so check for it
			 */
			fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
			if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) {
				if (fnd->pml_map.pm_port == reg.pm_port) {
					ans = 1;
					goto done;
				}
				else {
					ans = 0;
					goto done;
				}
			} else {
				/* 
				 * add to list
				 */
				pml = (struct pmaplist *)
				    malloc((u_int)sizeof(struct pmaplist));
				pml->pml_map = reg;
				pml->pml_next = pmaplist;
				pmaplist = pml;
				ans = 1;
			}
		done:
			if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
			    debugging) {
				fprintf(stderr, "svc_sendreply\n");
				abort();
			}
		}
		break;

	case PMAPPROC_UNSET:
		/*
		 * Remove a program,version to port mapping.
		 */
		if (!svc_getargs(xprt, xdr_pmap, &reg))
			svcerr_decode(xprt);
		else {
			ans = 0;
			for (prevpml = NULL, pml = pmaplist; pml != NULL; ) {
				if ((pml->pml_map.pm_prog != reg.pm_prog) ||
					(pml->pml_map.pm_vers != reg.pm_vers)) {
					/* both pml & prevpml move forwards */
					prevpml = pml;
					pml = pml->pml_next;
					continue;
				}
				/* found it; pml moves forward, prevpml stays */
				ans = 1;
				t = (caddr_t)pml;
				pml = pml->pml_next;
				if (prevpml == NULL)
					pmaplist = pml;
				else
					prevpml->pml_next = pml;
				free(t);
			}
			if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
			    debugging) {
				fprintf(stderr, "svc_sendreply\n");
				abort();
			}
		}
		break;

	case PMAPPROC_GETPORT:
		/*
		 * Lookup the mapping for a program,version and return its port
		 */
		if (!svc_getargs(xprt, xdr_pmap, &reg))
			svcerr_decode(xprt);
		else {
			fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
			if (fnd)
				port = fnd->pml_map.pm_port;
			else
				port = 0;
			if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) &&
			    debugging) {
				fprintf(stderr, "svc_sendreply\n");
				abort();
			}
		}
		break;

	case PMAPPROC_DUMP:
		/*
		 * Return the current set of mapped program,version
		 */
		if (!svc_getargs(xprt, xdr_void, NULL))
			svcerr_decode(xprt);
		else {
			if ((!svc_sendreply(xprt, xdr_pmaplist,
			    (caddr_t)&pmaplist)) && debugging) {
				fprintf(stderr, "svc_sendreply\n");
				abort();
			}
		}
		break;

	case PMAPPROC_CALLIT:
		/*
		 * Calls a procedure on the local machine.  If the requested
		 * procedure is not registered this procedure does not return
		 * error information!!
		 * This procedure is only supported on rpc/udp and calls via 
		 * rpc/udp.  It passes null authentication parameters.
		 */
		callit(rqstp, xprt);
		break;

	default:
		svcerr_noproc(xprt);
		break;
	}
}


/*
 * Stuff for the rmtcall service
 */
#define ARGSIZE 9000

typedef struct encap_parms {
	u_long arglen;
	char *args;
};

static bool_t
xdr_encap_parms(xdrs, epp)
	XDR *xdrs;
	struct encap_parms *epp;
{

	return (xdr_bytes(xdrs, &(epp->args), &(epp->arglen), ARGSIZE));
}

typedef struct rmtcallargs {
	u_long	rmt_prog;
	u_long	rmt_vers;
	u_long	rmt_port;
	u_long	rmt_proc;
	struct encap_parms rmt_args;
};

static bool_t
xdr_rmtcall_args(xdrs, cap)
	register XDR *xdrs;
	register struct rmtcallargs *cap;
{

	/* does not get a port number */
	if (xdr_u_long(xdrs, &(cap->rmt_prog)) &&
	    xdr_u_long(xdrs, &(cap->rmt_vers)) &&
	    xdr_u_long(xdrs, &(cap->rmt_proc))) {
		return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
	}
	return (FALSE);
}

static bool_t
xdr_rmtcall_result(xdrs, cap)
	register XDR *xdrs;
	register struct rmtcallargs *cap;
{
	if (xdr_u_long(xdrs, &(cap->rmt_port)))
		return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
	return (FALSE);
}

/*
 * only worries about the struct encap_parms part of struct rmtcallargs.
 * The arglen must already be set!!
 */
static bool_t
xdr_opaque_parms(xdrs, cap)
	XDR *xdrs;
	struct rmtcallargs *cap;
{

	return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
}

/*
 * This routine finds and sets the length of incoming opaque paraters
 * and then calls xdr_opaque_parms.
 */
static bool_t
xdr_len_opaque_parms(xdrs, cap)
	register XDR *xdrs;
	struct rmtcallargs *cap;
{
	register u_int beginpos, lowpos, highpos, currpos, pos;

	beginpos = lowpos = pos = xdr_getpos(xdrs);
	highpos = lowpos + ARGSIZE;
	while ((int)(highpos - lowpos) >= 0) {
		currpos = (lowpos + highpos) / 2;
		if (xdr_setpos(xdrs, currpos)) {
			pos = currpos;
			lowpos = currpos + 1;
		} else {
			highpos = currpos - 1;
		}
	}
	xdr_setpos(xdrs, beginpos);
	cap->rmt_args.arglen = pos - beginpos;
	return (xdr_opaque_parms(xdrs, cap));
}

/*
 * Call a remote procedure service
 * This procedure is very quiet when things go wrong.
 * The proc is written to support broadcast rpc.  In the broadcast case,
 * a machine should shut-up instead of complain, less the requestor be
 * overrun with complaints at the expense of not hearing a valid reply ...
 */
static
callit(rqstp, xprt)
	struct svc_req *rqstp;
	SVCXPRT *xprt;
{
	char buf[2000];
	struct rmtcallargs a;
	struct pmaplist *pml;
	u_short port;
	struct sockaddr_in me;
	int socket = -1;
	CLIENT *client;
	struct authunix_parms *au = (struct authunix_parms *)rqstp->rq_clntcred;
	struct timeval timeout;

	timeout.tv_sec = 5;
	timeout.tv_usec = 0;
	a.rmt_args.args = buf;
	if (!svc_getargs(xprt, xdr_rmtcall_args, &a))
	    return;
	if ((pml = find_service(a.rmt_prog, a.rmt_vers, IPPROTO_UDP)) == NULL)
	    return;
	port = pml->pml_map.pm_port;
	get_myaddress(&me);
	me.sin_port = htons(port);
	client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &socket);
	if (client != (CLIENT *)NULL) {
		if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) {
			client->cl_auth = authunix_create(au->aup_machname,
			   au->aup_uid, au->aup_gid, au->aup_len, au->aup_gids);
		}
		a.rmt_port = (u_long)port;
		if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a,
		    xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS) {
			svc_sendreply(xprt, xdr_rmtcall_result, &a);
		}
		AUTH_DESTROY(client->cl_auth);
		clnt_destroy(client);
	}
	(void)close(socket);
}
Commit	Line	Data
95f51977 C	1	#ifndef lint
	2	static char sccsid[] = "@(#)portmap.c 1.2 85/03/13 Copyr 1984 Sun Micro";
	3	#endif
	4
	5	/*
	6	* Copyright (c) 1984 by Sun Microsystems, Inc.
	7	*/
	8
	9	/*
	10	* portmap.c, Implements the program,version to port number mapping for
	11	* rpc.
	12	*/
	13
	14	/*
	15	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	16	* unrestricted use provided that this legend is included on all tape
	17	* media and as a part of the software program in whole or part. Users
	18	* may copy or modify Sun RPC without charge, but are not authorized
	19	* to license or distribute it to anyone else except as part of a product or
	20	* program developed by the user.
	21	*
	22	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	23	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	24	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	25	*
	26	* Sun RPC is provided with no support and without any obligation on the
	27	* part of Sun Microsystems, Inc. to assist in its use, correction,
	28	* modification or enhancement.
	29	*
	30	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	31	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	32	* OR ANY PART THEREOF.
	33	*
	34	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	35	* or profits or other special, indirect and consequential damages, even if
	36	* Sun has been advised of the possibility of such damages.
	37	*
	38	* Sun Microsystems, Inc.
	39	* 2550 Garcia Avenue
	40	* Mountain View, California 94043
	41	*/
	42
	43	#include <rpc/rpc.h>
	44	#include <rpc/pmap_prot.h>
	45	#include <stdio.h>
	46	#include <netdb.h>
	47	#include <sys/socket.h>
	48	#include <sys/time.h>
	49	#include <sys/ioctl.h>
	50
	51	char *malloc();
	52	int reg_service();
	53	static int debugging = 0;
	54
	55	main()
	56	{
	57	SVCXPRT *xprt;
	58	int sock, pid, t;
	59	struct sockaddr_in addr;
	60	int len = sizeof(struct sockaddr_in);
	61
	62	#ifndef DEBUG
	63	pid = fork();
	64	if (pid < 0) {
65	perror("portmap: fork");
66	exit(1);
67	}
68	if (pid != 0)
69	exit(0);
70	for (t = 0; t < 20; t++)
71	close(t);
72	open("/", 0);
73	dup2(0, 1);
74	dup2(0, 2);
75	t = open("/dev/tty", 2);
76	if (t >= 0) {
77	ioctl(t, TIOCNOTTY, (char *)0);
78	close(t);
79	}
80	#endif
81	if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
82	perror("portmap cannot create socket");
83	exit(1);
84	}
85
86	addr.sin_addr.s_addr = 0;
87	addr.sin_family = AF_INET;
88	addr.sin_port = htons(PMAPPORT);
89	if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
90	perror("portmap cannot bind");
91	exit(1);
92	}
93
94	if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) {
95	fprintf(stderr, "couldn't do udp_create\n");
96	exit(1);
97	}
98
99	if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
100	perror("portmap cannot create socket");
101	exit(1);
102	}
103	if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
104	perror("portmap cannot bind");
105	exit(1);
106	}
107	if ((xprt = svctcp_create(sock, 0, 0)) == (SVCXPRT *)NULL) {
108	fprintf(stderr, "couldn't do tcp_create\n");
109	exit(1);
110	}
111
112	(void)svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE);
113	svc_run();
114	fprintf(stderr, "run_svc returned unexpectedly\n");
115	abort();
116	}
117
118	struct pmaplist *pmaplist;
119
120	static struct pmaplist *
121	find_service(prog, vers, prot)
122	u_long prog;
123	u_long vers;
124	{
125	register struct pmaplist *hit = NULL;
126	register struct pmaplist *pml;
127
128	for (pml = pmaplist; pml != NULL; pml = pml->pml_next) {
129	if ((pml->pml_map.pm_prog != prog) \|\|
130	(pml->pml_map.pm_prot != prot))
131	continue;
132	hit = pml;
133	if (pml->pml_map.pm_vers == vers)
134	break;
135	}
136	return (hit);
137	}
138
139	/*
140	* 1 OK, 0 not
141	*/
142	reg_service(rqstp, xprt)
143	struct svc_req *rqstp;
144	SVCXPRT *xprt;
145	{
146	struct pmap reg;
147	struct pmaplist pml, prevpml, *fnd;
148	int ans, port;
149	caddr_t t;
150
151	#ifdef DEBUG
152	fprintf(stderr, "server: about do a switch\n");
153	#endif
154	switch (rqstp->rq_proc) {
155
156	case PMAPPROC_NULL:
157	/*
158	* Null proc call
159	*/
160	if ((!svc_sendreply(xprt, xdr_void, NULL)) && debugging) {
161	abort();
162	}
163	break;
164
165	case PMAPPROC_SET:
166	/*
167	* Set a program,version to port mapping
168	*/
169	if (!svc_getargs(xprt, xdr_pmap, &reg))
170	svcerr_decode(xprt);
171	else {
172	/*
173	* check to see if already used
174	* find_service returns a hit even if
175	* the versions don't match, so check for it
176	*/
177	fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
178	if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) {
179	if (fnd->pml_map.pm_port == reg.pm_port) {
180	ans = 1;
181	goto done;
182	}
183	else {
184	ans = 0;
185	goto done;
186	}
187	} else {
188	/*
189	* add to list
190	*/
191	pml = (struct pmaplist *)
192	malloc((u_int)sizeof(struct pmaplist));
193	pml->pml_map = reg;
194	pml->pml_next = pmaplist;
195	pmaplist = pml;
196	ans = 1;
197	}
198	done:
199	if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
200	debugging) {
201	fprintf(stderr, "svc_sendreply\n");
202	abort();
203	}
204	}
205	break;
206
207	case PMAPPROC_UNSET:
208	/*
209	* Remove a program,version to port mapping.
210	*/
211	if (!svc_getargs(xprt, xdr_pmap, &reg))
212	svcerr_decode(xprt);
213	else {
214	ans = 0;
215	for (prevpml = NULL, pml = pmaplist; pml != NULL; ) {
216	if ((pml->pml_map.pm_prog != reg.pm_prog) \|\|
217	(pml->pml_map.pm_vers != reg.pm_vers)) {
218	/* both pml & prevpml move forwards */
219	prevpml = pml;
220	pml = pml->pml_next;
221	continue;
222	}
223	/* found it; pml moves forward, prevpml stays */
224	ans = 1;
225	t = (caddr_t)pml;
226	pml = pml->pml_next;
227	if (prevpml == NULL)
228	pmaplist = pml;
229	else
230	prevpml->pml_next = pml;
231	free(t);
232	}
233	if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
234	debugging) {
235	fprintf(stderr, "svc_sendreply\n");
236	abort();
237	}
238	}
239	break;
240
241	case PMAPPROC_GETPORT:
242	/*
243	* Lookup the mapping for a program,version and return its port
244	*/
245	if (!svc_getargs(xprt, xdr_pmap, &reg))
246	svcerr_decode(xprt);
247	else {
248	fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
249	if (fnd)
250	port = fnd->pml_map.pm_port;
251	else
252	port = 0;
253	if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) &&
254	debugging) {
255	fprintf(stderr, "svc_sendreply\n");
256	abort();
257	}
258	}
259	break;
260
261	case PMAPPROC_DUMP:
262	/*
263	* Return the current set of mapped program,version
264	*/
265	if (!svc_getargs(xprt, xdr_void, NULL))
266	svcerr_decode(xprt);
267	else {
268	if ((!svc_sendreply(xprt, xdr_pmaplist,
269	(caddr_t)&pmaplist)) && debugging) {
270	fprintf(stderr, "svc_sendreply\n");
271	abort();
272	}
273	}
274	break;
275
276	case PMAPPROC_CALLIT:
277	/*
278	* Calls a procedure on the local machine. If the requested
279	* procedure is not registered this procedure does not return
280	* error information!!
281	* This procedure is only supported on rpc/udp and calls via
282	* rpc/udp. It passes null authentication parameters.
283	*/
284	callit(rqstp, xprt);
285	break;
286
287	default:
288	svcerr_noproc(xprt);
289	break;
290	}
291	}
292
293
294	/*
295	* Stuff for the rmtcall service
296	*/
297	#define ARGSIZE 9000
298
299	typedef struct encap_parms {
300	u_long arglen;
301	char *args;
302	};
303
304	static bool_t
305	xdr_encap_parms(xdrs, epp)
306	XDR *xdrs;
307	struct encap_parms *epp;
308	{
309
310	return (xdr_bytes(xdrs, &(epp->args), &(epp->arglen), ARGSIZE));
311	}
312
313	typedef struct rmtcallargs {
314	u_long rmt_prog;
315	u_long rmt_vers;
316	u_long rmt_port;
317	u_long rmt_proc;
318	struct encap_parms rmt_args;
319	};
320
321	static bool_t
322	xdr_rmtcall_args(xdrs, cap)
323	register XDR *xdrs;
324	register struct rmtcallargs *cap;
325	{
326
327	/* does not get a port number */
328	if (xdr_u_long(xdrs, &(cap->rmt_prog)) &&
329	xdr_u_long(xdrs, &(cap->rmt_vers)) &&
330	xdr_u_long(xdrs, &(cap->rmt_proc))) {
331	return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
332	}
333	return (FALSE);
334	}
335
336	static bool_t
337	xdr_rmtcall_result(xdrs, cap)
338	register XDR *xdrs;
339	register struct rmtcallargs *cap;
340	{
341	if (xdr_u_long(xdrs, &(cap->rmt_port)))
342	return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
343	return (FALSE);
344	}
345
346	/*
347	* only worries about the struct encap_parms part of struct rmtcallargs.
348	* The arglen must already be set!!
349	*/
350	static bool_t
351	xdr_opaque_parms(xdrs, cap)
352	XDR *xdrs;
353	struct rmtcallargs *cap;
354	{
355
356	return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
357	}
358
359	/*
360	* This routine finds and sets the length of incoming opaque paraters
361	* and then calls xdr_opaque_parms.
362	*/
363	static bool_t
364	xdr_len_opaque_parms(xdrs, cap)
365	register XDR *xdrs;
366	struct rmtcallargs *cap;
367	{
368	register u_int beginpos, lowpos, highpos, currpos, pos;
369
370	beginpos = lowpos = pos = xdr_getpos(xdrs);
371	highpos = lowpos + ARGSIZE;
372	while ((int)(highpos - lowpos) >= 0) {
373	currpos = (lowpos + highpos) / 2;
374	if (xdr_setpos(xdrs, currpos)) {
375	pos = currpos;
376	lowpos = currpos + 1;
377	} else {
378	highpos = currpos - 1;
379	}
380	}
381	xdr_setpos(xdrs, beginpos);
382	cap->rmt_args.arglen = pos - beginpos;
383	return (xdr_opaque_parms(xdrs, cap));
384	}
385
386	/*
387	* Call a remote procedure service
388	* This procedure is very quiet when things go wrong.
389	* The proc is written to support broadcast rpc. In the broadcast case,
390	* a machine should shut-up instead of complain, less the requestor be
391	* overrun with complaints at the expense of not hearing a valid reply ...
392	*/
393	static
394	callit(rqstp, xprt)
395	struct svc_req *rqstp;
396	SVCXPRT *xprt;
397	{
398	char buf[2000];
399	struct rmtcallargs a;
400	struct pmaplist *pml;
401	u_short port;
402	struct sockaddr_in me;
403	int socket = -1;
404	CLIENT *client;
405	struct authunix_parms au = (struct authunix_parms )rqstp->rq_clntcred;
406	struct timeval timeout;
407
408	timeout.tv_sec = 5;
409	timeout.tv_usec = 0;
410	a.rmt_args.args = buf;
411	if (!svc_getargs(xprt, xdr_rmtcall_args, &a))
412	return;
413	if ((pml = find_service(a.rmt_prog, a.rmt_vers, IPPROTO_UDP)) == NULL)
414	return;
415	port = pml->pml_map.pm_port;
416	get_myaddress(&me);
417	me.sin_port = htons(port);
418	client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &socket);
419	if (client != (CLIENT *)NULL) {
420	if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) {
421	client->cl_auth = authunix_create(au->aup_machname,
422	au->aup_uid, au->aup_gid, au->aup_len, au->aup_gids);
423	}
424	a.rmt_port = (u_long)port;
425	if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a,
426	xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS) {
427	svc_sendreply(xprt, xdr_rmtcall_result, &a);
428	}
429	AUTH_DESTROY(client->cl_auth);
430	clnt_destroy(client);
431	}
432	(void)close(socket);
433	}