1 /* $NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2009, Sun Microsystems, Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND 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 THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * pmap_rmt.c
35 * Client interface to pmap rpc service.
36 * remote call and broadcast service
37 *
38 * Copyright (C) 1984, Sun Microsystems, Inc.
39 */
40
41 #include "namespace.h"
42 #include <sys/types.h>
43 #include <sys/ioctl.h>
44 #include <sys/poll.h>
45 #include <sys/socket.h>
46
47 #include <net/if.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
50
51 #include <assert.h>
52 #include <err.h>
53 #include <errno.h>
54 #include <stdio.h>
55 #include <string.h>
56 #include <unistd.h>
57
58 #include <rpc/rpc.h>
59 #include <rpc/pmap_prot.h>
60 #include <rpc/pmap_clnt.h>
61 #include <rpc/pmap_rmt.h>
62 #include "un-namespace.h"
63
64 static const struct timeval timeout = { 3, 0 };
65
66 /*
67 * pmapper remote-call-service interface.
68 * This routine is used to call the pmapper remote call service
69 * which will look up a service program in the port maps, and then
70 * remotely call that routine with the given parameters. This allows
71 * programs to do a lookup and call in one step.
72 */
73 enum clnt_stat
pmap_rmtcall(struct sockaddr_in * addr,u_long prog,u_long vers,u_long proc,xdrproc_t xdrargs,caddr_t argsp,xdrproc_t xdrres,caddr_t resp,struct timeval tout,u_long * port_ptr)74 pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
75 xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
76 struct timeval tout, u_long *port_ptr)
77 {
78 int sock = -1;
79 CLIENT *client;
80 struct rmtcallargs a;
81 struct rmtcallres r;
82 enum clnt_stat stat;
83
84 assert(addr != NULL);
85 assert(port_ptr != NULL);
86
87 addr->sin_port = htons(PMAPPORT);
88 client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
89 if (client != NULL) {
90 a.prog = prog;
91 a.vers = vers;
92 a.proc = proc;
93 a.args_ptr = argsp;
94 a.xdr_args = xdrargs;
95 r.port_ptr = port_ptr;
96 r.results_ptr = resp;
97 r.xdr_results = xdrres;
98 stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
99 (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
100 &r, tout);
101 CLNT_DESTROY(client);
102 } else {
103 stat = RPC_FAILED;
104 }
105 addr->sin_port = 0;
106 return (stat);
107 }
108
109
110 /*
111 * XDR remote call arguments
112 * written for XDR_ENCODE direction only
113 */
114 bool_t
xdr_rmtcall_args(XDR * xdrs,struct rmtcallargs * cap)115 xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
116 {
117 u_int lenposition, argposition, position;
118
119 assert(xdrs != NULL);
120 assert(cap != NULL);
121
122 if (xdr_u_long(xdrs, &(cap->prog)) &&
123 xdr_u_long(xdrs, &(cap->vers)) &&
124 xdr_u_long(xdrs, &(cap->proc))) {
125 lenposition = XDR_GETPOS(xdrs);
126 if (! xdr_u_long(xdrs, &(cap->arglen)))
127 return (FALSE);
128 argposition = XDR_GETPOS(xdrs);
129 if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
130 return (FALSE);
131 position = XDR_GETPOS(xdrs);
132 cap->arglen = (u_long)position - (u_long)argposition;
133 XDR_SETPOS(xdrs, lenposition);
134 if (! xdr_u_long(xdrs, &(cap->arglen)))
135 return (FALSE);
136 XDR_SETPOS(xdrs, position);
137 return (TRUE);
138 }
139 return (FALSE);
140 }
141
142 /*
143 * XDR remote call results
144 * written for XDR_DECODE direction only
145 */
146 bool_t
xdr_rmtcallres(XDR * xdrs,struct rmtcallres * crp)147 xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
148 {
149 caddr_t port_ptr;
150
151 assert(xdrs != NULL);
152 assert(crp != NULL);
153
154 port_ptr = (caddr_t)(void *)crp->port_ptr;
155 if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
156 (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
157 crp->port_ptr = (u_long *)(void *)port_ptr;
158 return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
159 }
160 return (FALSE);
161 }
162