[unix-history] / usr / src / usr.sbin / portmap / portmap.c

/*
 * Copyright (c) 1984 by Sun Microsystems, Inc.
 *
 *	@(#)portmap.c	5.1 (Berkeley) %G%
 */

/* @(#)portmap.c	2.3 88/08/11 4.0 RPCSRC */
#ifndef lint
static	char sccsid[] = "@(#)portmap.c 1.32 87/08/06 Copyr 1984 Sun Micro";
#endif

/*
 * 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/ioctl.h>
#include <sys/wait.h>
#include <sys/signal.h>

char *malloc();
int reg_service();
void reap();
struct pmaplist *pmaplist;
static int debugging = 0;

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

#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);
	}
	/* make an entry for ourself */
	pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
	pml->pml_next = 0;
	pml->pml_map.pm_prog = PMAPPROG;
	pml->pml_map.pm_vers = PMAPVERS;
	pml->pml_map.pm_prot = IPPROTO_UDP;
	pml->pml_map.pm_port = PMAPPORT;
	pmaplist = pml;

	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, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE))
	    == (SVCXPRT *)NULL) {
		fprintf(stderr, "couldn't do tcp_create\n");
		exit(1);
	}
	/* make an entry for ourself */
	pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
	pml->pml_map.pm_prog = PMAPPROG;
	pml->pml_map.pm_vers = PMAPVERS;
	pml->pml_map.pm_prot = IPPROTO_TCP;
	pml->pml_map.pm_port = PMAPPORT;
	pml->pml_next = pmaplist;
	pmaplist = pml;

	(void)svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE);

	(void)signal(SIGCHLD, reap);
	svc_run();
	fprintf(stderr, "run_svc returned unexpectedly\n");
	abort();
}

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 END of list
				 */
				pml = (struct pmaplist *)
				    malloc((u_int)sizeof(struct pmaplist));
				pml->pml_map = reg;
				pml->pml_next = 0;
				if (pmaplist == 0) {
					pmaplist = pml;
				} else {
					for (fnd= pmaplist; fnd->pml_next != 0;
					    fnd = fnd->pml_next);
					fnd->pml_next = 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 ...
 *
 * This now forks so that the program & process that it calls can call 
 * back to the portmapper.
 */
static
callit(rqstp, xprt)
	struct svc_req *rqstp;
	SVCXPRT *xprt;
{
	struct rmtcallargs a;
	struct pmaplist *pml;
	u_short port;
	struct sockaddr_in me;
	int pid, socket = -1;
	CLIENT *client;
	struct authunix_parms *au = (struct authunix_parms *)rqstp->rq_clntcred;
	struct timeval timeout;
	char buf[ARGSIZE];

	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;
	/*
	 * fork a child to do the work.  Parent immediately returns.
	 * Child exits upon completion.
	 */
	if ((pid = fork()) != 0) {
		if (debugging && (pid < 0)) {
			fprintf(stderr, "portmap CALLIT: cannot fork.\n");
		}
		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);
	exit(0);
}

void
reap()
{
	while (wait3(NULL, WNOHANG, NULL) > 0);
}
Commit	Line	Data
f778cef7 KM	1	/*
	2	* Copyright (c) 1984 by Sun Microsystems, Inc.
	3	*
	4	* @(#)portmap.c 5.1 (Berkeley) %G%
	5	*/
	6
	7	/* @(#)portmap.c 2.3 88/08/11 4.0 RPCSRC */
	8	#ifndef lint
	9	static char sccsid[] = "@(#)portmap.c 1.32 87/08/06 Copyr 1984 Sun Micro";
	10	#endif
	11
	12	/*
	13	* portmap.c, Implements the program,version to port number mapping for
	14	* rpc.
	15	*/
	16
	17	/*
	18	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	19	* unrestricted use provided that this legend is included on all tape
	20	* media and as a part of the software program in whole or part. Users
	21	* may copy or modify Sun RPC without charge, but are not authorized
	22	* to license or distribute it to anyone else except as part of a product or
	23	* program developed by the user.
	24	*
	25	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	26	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	27	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	28	*
	29	* Sun RPC is provided with no support and without any obligation on the
	30	* part of Sun Microsystems, Inc. to assist in its use, correction,
	31	* modification or enhancement.
	32	*
	33	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	34	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	35	* OR ANY PART THEREOF.
	36	*
	37	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	38	* or profits or other special, indirect and consequential damages, even if
	39	* Sun has been advised of the possibility of such damages.
	40	*
	41	* Sun Microsystems, Inc.
	42	* 2550 Garcia Avenue
	43	* Mountain View, California 94043
	44	*/
	45
	46	#include <rpc/rpc.h>
	47	#include <rpc/pmap_prot.h>
	48	#include <stdio.h>
	49	#include <netdb.h>
	50	#include <sys/socket.h>
	51	#include <sys/ioctl.h>
	52	#include <sys/wait.h>
	53	#include <sys/signal.h>
	54
	55	char *malloc();
	56	int reg_service();
	57	void reap();
	58	struct pmaplist *pmaplist;
	59	static int debugging = 0;
	60
	61	main()
	62	{
	63	SVCXPRT *xprt;
	64	int sock, pid, t;
65	struct sockaddr_in addr;
66	int len = sizeof(struct sockaddr_in);
67	register struct pmaplist *pml;
68
69	#ifndef DEBUG
70	pid = fork();
71	if (pid < 0) {
72	perror("portmap: fork");
73	exit(1);
74	}
75	if (pid != 0)
76	exit(0);
77	for (t = 0; t < 20; t++)
78	close(t);
79	open("/", 0);
80	dup2(0, 1);
81	dup2(0, 2);
82	t = open("/dev/tty", 2);
83	if (t >= 0) {
84	ioctl(t, TIOCNOTTY, (char *)0);
85	close(t);
86	}
87	#endif
88	if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
89	perror("portmap cannot create socket");
90	exit(1);
91	}
92
93	addr.sin_addr.s_addr = 0;
94	addr.sin_family = AF_INET;
95	addr.sin_port = htons(PMAPPORT);
96	if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
97	perror("portmap cannot bind");
98	exit(1);
99	}
100
101	if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) {
102	fprintf(stderr, "couldn't do udp_create\n");
103	exit(1);
104	}
105	/* make an entry for ourself */
106	pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
107	pml->pml_next = 0;
108	pml->pml_map.pm_prog = PMAPPROG;
109	pml->pml_map.pm_vers = PMAPVERS;
110	pml->pml_map.pm_prot = IPPROTO_UDP;
111	pml->pml_map.pm_port = PMAPPORT;
112	pmaplist = pml;
113
114	if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
115	perror("portmap cannot create socket");
116	exit(1);
117	}
118	if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
119	perror("portmap cannot bind");
120	exit(1);
121	}
122	if ((xprt = svctcp_create(sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE))
123	== (SVCXPRT *)NULL) {
124	fprintf(stderr, "couldn't do tcp_create\n");
125	exit(1);
126	}
127	/* make an entry for ourself */
128	pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
129	pml->pml_map.pm_prog = PMAPPROG;
130	pml->pml_map.pm_vers = PMAPVERS;
131	pml->pml_map.pm_prot = IPPROTO_TCP;
132	pml->pml_map.pm_port = PMAPPORT;
133	pml->pml_next = pmaplist;
134	pmaplist = pml;
135
136	(void)svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE);
137
138	(void)signal(SIGCHLD, reap);
139	svc_run();
140	fprintf(stderr, "run_svc returned unexpectedly\n");
141	abort();
142	}
143
144	static struct pmaplist *
145	find_service(prog, vers, prot)
146	u_long prog;
147	u_long vers;
148	{
149	register struct pmaplist *hit = NULL;
150	register struct pmaplist *pml;
151
152	for (pml = pmaplist; pml != NULL; pml = pml->pml_next) {
153	if ((pml->pml_map.pm_prog != prog) \|\|
154	(pml->pml_map.pm_prot != prot))
155	continue;
156	hit = pml;
157	if (pml->pml_map.pm_vers == vers)
158	break;
159	}
160	return (hit);
161	}
162
163	/*
164	* 1 OK, 0 not
165	*/
166	reg_service(rqstp, xprt)
167	struct svc_req *rqstp;
168	SVCXPRT *xprt;
169	{
170	struct pmap reg;
171	struct pmaplist pml, prevpml, *fnd;
172	int ans, port;
173	caddr_t t;
174
175	#ifdef DEBUG
176	fprintf(stderr, "server: about do a switch\n");
177	#endif
178	switch (rqstp->rq_proc) {
179
180	case PMAPPROC_NULL:
181	/*
182	* Null proc call
183	*/
184	if ((!svc_sendreply(xprt, xdr_void, NULL)) && debugging) {
185	abort();
186	}
187	break;
188
189	case PMAPPROC_SET:
190	/*
191	* Set a program,version to port mapping
192	*/
193	if (!svc_getargs(xprt, xdr_pmap, &reg))
194	svcerr_decode(xprt);
195	else {
196	/*
197	* check to see if already used
198	* find_service returns a hit even if
199	* the versions don't match, so check for it
200	*/
201	fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
202	if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) {
203	if (fnd->pml_map.pm_port == reg.pm_port) {
204	ans = 1;
205	goto done;
206	}
207	else {
208	ans = 0;
209	goto done;
210	}
211	} else {
212	/*
213	* add to END of list
214	*/
215	pml = (struct pmaplist *)
216	malloc((u_int)sizeof(struct pmaplist));
217	pml->pml_map = reg;
218	pml->pml_next = 0;
219	if (pmaplist == 0) {
220	pmaplist = pml;
221	} else {
222	for (fnd= pmaplist; fnd->pml_next != 0;
223	fnd = fnd->pml_next);
224	fnd->pml_next = pml;
225	}
226	ans = 1;
227	}
228	done:
229	if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
230	debugging) {
231	fprintf(stderr, "svc_sendreply\n");
232	abort();
233	}
234	}
235	break;
236
237	case PMAPPROC_UNSET:
238	/*
239	* Remove a program,version to port mapping.
240	*/
241	if (!svc_getargs(xprt, xdr_pmap, &reg))
242	svcerr_decode(xprt);
243	else {
244	ans = 0;
245	for (prevpml = NULL, pml = pmaplist; pml != NULL; ) {
246	if ((pml->pml_map.pm_prog != reg.pm_prog) \|\|
247	(pml->pml_map.pm_vers != reg.pm_vers)) {
248	/* both pml & prevpml move forwards */
249	prevpml = pml;
250	pml = pml->pml_next;
251	continue;
252	}
253	/* found it; pml moves forward, prevpml stays */
254	ans = 1;
255	t = (caddr_t)pml;
256	pml = pml->pml_next;
257	if (prevpml == NULL)
258	pmaplist = pml;
259	else
260	prevpml->pml_next = pml;
261	free(t);
262	}
263	if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
264	debugging) {
265	fprintf(stderr, "svc_sendreply\n");
266	abort();
267	}
268	}
269	break;
270
271	case PMAPPROC_GETPORT:
272	/*
273	* Lookup the mapping for a program,version and return its port
274	*/
275	if (!svc_getargs(xprt, xdr_pmap, &reg))
276	svcerr_decode(xprt);
277	else {
278	fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
279	if (fnd)
280	port = fnd->pml_map.pm_port;
281	else
282	port = 0;
283	if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) &&
284	debugging) {
285	fprintf(stderr, "svc_sendreply\n");
286	abort();
287	}
288	}
289	break;
290
291	case PMAPPROC_DUMP:
292	/*
293	* Return the current set of mapped program,version
294	*/
295	if (!svc_getargs(xprt, xdr_void, NULL))
296	svcerr_decode(xprt);
297	else {
298	if ((!svc_sendreply(xprt, xdr_pmaplist,
299	(caddr_t)&pmaplist)) && debugging) {
300	fprintf(stderr, "svc_sendreply\n");
301	abort();
302	}
303	}
304	break;
305
306	case PMAPPROC_CALLIT:
307	/*
308	* Calls a procedure on the local machine. If the requested
309	* procedure is not registered this procedure does not return
310	* error information!!
311	* This procedure is only supported on rpc/udp and calls via
312	* rpc/udp. It passes null authentication parameters.
313	*/
314	callit(rqstp, xprt);
315	break;
316
317	default:
318	svcerr_noproc(xprt);
319	break;
320	}
321	}
322
323
324	/*
325	* Stuff for the rmtcall service
326	*/
327	#define ARGSIZE 9000
328
329	typedef struct encap_parms {
330	u_long arglen;
331	char *args;
332	};
333
334	static bool_t
335	xdr_encap_parms(xdrs, epp)
336	XDR *xdrs;
337	struct encap_parms *epp;
338	{
339
340	return (xdr_bytes(xdrs, &(epp->args), &(epp->arglen), ARGSIZE));
341	}
342
343	typedef struct rmtcallargs {
344	u_long rmt_prog;
345	u_long rmt_vers;
346	u_long rmt_port;
347	u_long rmt_proc;
348	struct encap_parms rmt_args;
349	};
350
351	static bool_t
352	xdr_rmtcall_args(xdrs, cap)
353	register XDR *xdrs;
354	register struct rmtcallargs *cap;
355	{
356
357	/* does not get a port number */
358	if (xdr_u_long(xdrs, &(cap->rmt_prog)) &&
359	xdr_u_long(xdrs, &(cap->rmt_vers)) &&
360	xdr_u_long(xdrs, &(cap->rmt_proc))) {
361	return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
362	}
363	return (FALSE);
364	}
365
366	static bool_t
367	xdr_rmtcall_result(xdrs, cap)
368	register XDR *xdrs;
369	register struct rmtcallargs *cap;
370	{
371	if (xdr_u_long(xdrs, &(cap->rmt_port)))
372	return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
373	return (FALSE);
374	}
375
376	/*
377	* only worries about the struct encap_parms part of struct rmtcallargs.
378	* The arglen must already be set!!
379	*/
380	static bool_t
381	xdr_opaque_parms(xdrs, cap)
382	XDR *xdrs;
383	struct rmtcallargs *cap;
384	{
385
386	return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
387	}
388
389	/*
390	* This routine finds and sets the length of incoming opaque paraters
391	* and then calls xdr_opaque_parms.
392	*/
393	static bool_t
394	xdr_len_opaque_parms(xdrs, cap)
395	register XDR *xdrs;
396	struct rmtcallargs *cap;
397	{
398	register u_int beginpos, lowpos, highpos, currpos, pos;
399
400	beginpos = lowpos = pos = xdr_getpos(xdrs);
401	highpos = lowpos + ARGSIZE;
402	while ((int)(highpos - lowpos) >= 0) {
403	currpos = (lowpos + highpos) / 2;
404	if (xdr_setpos(xdrs, currpos)) {
405	pos = currpos;
406	lowpos = currpos + 1;
407	} else {
408	highpos = currpos - 1;
409	}
410	}
411	xdr_setpos(xdrs, beginpos);
412	cap->rmt_args.arglen = pos - beginpos;
413	return (xdr_opaque_parms(xdrs, cap));
414	}
415
416	/*
417	* Call a remote procedure service
418	* This procedure is very quiet when things go wrong.
419	* The proc is written to support broadcast rpc. In the broadcast case,
420	* a machine should shut-up instead of complain, less the requestor be
421	* overrun with complaints at the expense of not hearing a valid reply ...
422	*
423	* This now forks so that the program & process that it calls can call
424	* back to the portmapper.
425	*/
426	static
427	callit(rqstp, xprt)
428	struct svc_req *rqstp;
429	SVCXPRT *xprt;
430	{
431	struct rmtcallargs a;
432	struct pmaplist *pml;
433	u_short port;
434	struct sockaddr_in me;
435	int pid, socket = -1;
436	CLIENT *client;
437	struct authunix_parms au = (struct authunix_parms )rqstp->rq_clntcred;
438	struct timeval timeout;
439	char buf[ARGSIZE];
440
441	timeout.tv_sec = 5;
442	timeout.tv_usec = 0;
443	a.rmt_args.args = buf;
444	if (!svc_getargs(xprt, xdr_rmtcall_args, &a))
445	return;
446	if ((pml = find_service(a.rmt_prog, a.rmt_vers, IPPROTO_UDP)) == NULL)
447	return;
448	/*
449	* fork a child to do the work. Parent immediately returns.
450	* Child exits upon completion.
451	*/
452	if ((pid = fork()) != 0) {
453	if (debugging && (pid < 0)) {
454	fprintf(stderr, "portmap CALLIT: cannot fork.\n");
455	}
456	return;
457	}
458	port = pml->pml_map.pm_port;
459	get_myaddress(&me);
460	me.sin_port = htons(port);
461	client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &socket);
462	if (client != (CLIENT *)NULL) {
463	if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) {
464	client->cl_auth = authunix_create(au->aup_machname,
465	au->aup_uid, au->aup_gid, au->aup_len, au->aup_gids);
466	}
467	a.rmt_port = (u_long)port;
468	if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a,
469	xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS) {
470	svc_sendreply(xprt, xdr_rmtcall_result, &a);
471	}
472	AUTH_DESTROY(client->cl_auth);
473	clnt_destroy(client);
474	}
475	(void)close(socket);
476	exit(0);
477	}
478
479	void
480	reap()
481	{
482	while (wait3(NULL, WNOHANG, NULL) > 0);
483	}