pmap_rmt.c revision 136581 
1/*	$NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos Exp $	*/
2
3/*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part.  Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California  94043
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char *sccsid2 = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
34static char *sccsid = "@(#)pmap_rmt.c	2.2 88/08/01 4.0 RPCSRC";
35#endif
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/lib/libc/rpc/pmap_rmt.c 136581 2004-10-16 06:11:35Z obrien $");
38
39/*
40 * pmap_rmt.c
41 * Client interface to pmap rpc service.
42 * remote call and broadcast service
43 *
44 * Copyright (C) 1984, Sun Microsystems, Inc.
45 */
46
47#include "namespace.h"
48#include <sys/types.h>
49#include <sys/ioctl.h>
50#include <sys/poll.h>
51#include <sys/socket.h>
52
53#include <net/if.h>
54#include <netinet/in.h>
55#include <arpa/inet.h>
56
57#include <assert.h>
58#include <err.h>
59#include <errno.h>
60#include <stdio.h>
61#include <string.h>
62#include <unistd.h>
63
64#include <rpc/rpc.h>
65#include <rpc/pmap_prot.h>
66#include <rpc/pmap_clnt.h>
67#include <rpc/pmap_rmt.h>
68#include "un-namespace.h"
69
70static const struct timeval timeout = { 3, 0 };
71
72/*
73 * pmapper remote-call-service interface.
74 * This routine is used to call the pmapper remote call service
75 * which will look up a service program in the port maps, and then
76 * remotely call that routine with the given parameters.  This allows
77 * programs to do a lookup and call in one step.
78*/
79enum clnt_stat
80pmap_rmtcall(addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout,
81    port_ptr)
82	struct sockaddr_in *addr;
83	u_long prog, vers, proc;
84	xdrproc_t xdrargs, xdrres;
85	caddr_t argsp, resp;
86	struct timeval tout;
87	u_long *port_ptr;
88{
89	int sock = -1;
90	CLIENT *client;
91	struct rmtcallargs a;
92	struct rmtcallres r;
93	enum clnt_stat stat;
94
95	assert(addr != NULL);
96	assert(port_ptr != NULL);
97
98	addr->sin_port = htons(PMAPPORT);
99	client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
100	if (client != NULL) {
101		a.prog = prog;
102		a.vers = vers;
103		a.proc = proc;
104		a.args_ptr = argsp;
105		a.xdr_args = xdrargs;
106		r.port_ptr = port_ptr;
107		r.results_ptr = resp;
108		r.xdr_results = xdrres;
109		stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
110		    (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
111		    &r, tout);
112		CLNT_DESTROY(client);
113	} else {
114		stat = RPC_FAILED;
115	}
116	addr->sin_port = 0;
117	return (stat);
118}
119
120
121/*
122 * XDR remote call arguments
123 * written for XDR_ENCODE direction only
124 */
125bool_t
126xdr_rmtcall_args(xdrs, cap)
127	XDR *xdrs;
128	struct rmtcallargs *cap;
129{
130	u_int lenposition, argposition, position;
131
132	assert(xdrs != NULL);
133	assert(cap != NULL);
134
135	if (xdr_u_long(xdrs, &(cap->prog)) &&
136	    xdr_u_long(xdrs, &(cap->vers)) &&
137	    xdr_u_long(xdrs, &(cap->proc))) {
138		lenposition = XDR_GETPOS(xdrs);
139		if (! xdr_u_long(xdrs, &(cap->arglen)))
140		    return (FALSE);
141		argposition = XDR_GETPOS(xdrs);
142		if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
143		    return (FALSE);
144		position = XDR_GETPOS(xdrs);
145		cap->arglen = (u_long)position - (u_long)argposition;
146		XDR_SETPOS(xdrs, lenposition);
147		if (! xdr_u_long(xdrs, &(cap->arglen)))
148		    return (FALSE);
149		XDR_SETPOS(xdrs, position);
150		return (TRUE);
151	}
152	return (FALSE);
153}
154
155/*
156 * XDR remote call results
157 * written for XDR_DECODE direction only
158 */
159bool_t
160xdr_rmtcallres(xdrs, crp)
161	XDR *xdrs;
162	struct rmtcallres *crp;
163{
164	caddr_t port_ptr;
165
166	assert(xdrs != NULL);
167	assert(crp != NULL);
168
169	port_ptr = (caddr_t)(void *)crp->port_ptr;
170	if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
171	    (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
172		crp->port_ptr = (u_long *)(void *)port_ptr;
173		return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
174	}
175	return (FALSE);
176}
177