pmap_rmt.c revision 331722 
1/*	$NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 *   this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 *   this list of conditions and the following disclaimer in the documentation
13 *   and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 *   contributors may be used to endorse or promote products derived
16 *   from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#if defined(LIBC_SCCS) && !defined(lint)
32static char *sccsid2 = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
33static char *sccsid = "@(#)pmap_rmt.c	2.2 88/08/01 4.0 RPCSRC";
34#endif
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: stable/11/lib/libc/rpc/pmap_rmt.c 331722 2018-03-29 02:50:57Z eadler $");
37
38/*
39 * pmap_rmt.c
40 * Client interface to pmap rpc service.
41 * remote call and broadcast service
42 *
43 * Copyright (C) 1984, Sun Microsystems, Inc.
44 */
45
46#include "namespace.h"
47#include <sys/types.h>
48#include <sys/ioctl.h>
49#include <sys/poll.h>
50#include <sys/socket.h>
51
52#include <net/if.h>
53#include <netinet/in.h>
54#include <arpa/inet.h>
55
56#include <assert.h>
57#include <err.h>
58#include <errno.h>
59#include <stdio.h>
60#include <string.h>
61#include <unistd.h>
62
63#include <rpc/rpc.h>
64#include <rpc/pmap_prot.h>
65#include <rpc/pmap_clnt.h>
66#include <rpc/pmap_rmt.h>
67#include "un-namespace.h"
68
69static const struct timeval timeout = { 3, 0 };
70
71/*
72 * pmapper remote-call-service interface.
73 * This routine is used to call the pmapper remote call service
74 * which will look up a service program in the port maps, and then
75 * remotely call that routine with the given parameters.  This allows
76 * programs to do a lookup and call in one step.
77*/
78enum clnt_stat
79pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
80    xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
81    struct timeval tout, u_long *port_ptr)
82{
83	int sock = -1;
84	CLIENT *client;
85	struct rmtcallargs a;
86	struct rmtcallres r;
87	enum clnt_stat stat;
88
89	assert(addr != NULL);
90	assert(port_ptr != NULL);
91
92	addr->sin_port = htons(PMAPPORT);
93	client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
94	if (client != NULL) {
95		a.prog = prog;
96		a.vers = vers;
97		a.proc = proc;
98		a.args_ptr = argsp;
99		a.xdr_args = xdrargs;
100		r.port_ptr = port_ptr;
101		r.results_ptr = resp;
102		r.xdr_results = xdrres;
103		stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
104		    (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
105		    &r, tout);
106		CLNT_DESTROY(client);
107	} else {
108		stat = RPC_FAILED;
109	}
110	addr->sin_port = 0;
111	return (stat);
112}
113
114
115/*
116 * XDR remote call arguments
117 * written for XDR_ENCODE direction only
118 */
119bool_t
120xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
121{
122	u_int lenposition, argposition, position;
123
124	assert(xdrs != NULL);
125	assert(cap != NULL);
126
127	if (xdr_u_long(xdrs, &(cap->prog)) &&
128	    xdr_u_long(xdrs, &(cap->vers)) &&
129	    xdr_u_long(xdrs, &(cap->proc))) {
130		lenposition = XDR_GETPOS(xdrs);
131		if (! xdr_u_long(xdrs, &(cap->arglen)))
132		    return (FALSE);
133		argposition = XDR_GETPOS(xdrs);
134		if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
135		    return (FALSE);
136		position = XDR_GETPOS(xdrs);
137		cap->arglen = (u_long)position - (u_long)argposition;
138		XDR_SETPOS(xdrs, lenposition);
139		if (! xdr_u_long(xdrs, &(cap->arglen)))
140		    return (FALSE);
141		XDR_SETPOS(xdrs, position);
142		return (TRUE);
143	}
144	return (FALSE);
145}
146
147/*
148 * XDR remote call results
149 * written for XDR_DECODE direction only
150 */
151bool_t
152xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
153{
154	caddr_t port_ptr;
155
156	assert(xdrs != NULL);
157	assert(crp != NULL);
158
159	port_ptr = (caddr_t)(void *)crp->port_ptr;
160	if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
161	    (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
162		crp->port_ptr = (u_long *)(void *)port_ptr;
163		return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
164	}
165	return (FALSE);
166}
167