1 /*-
2 * Copyright (c) 2009, Sun Microsystems, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro
29 * @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC
30 * $NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos Exp $
31 * $FreeBSD: src/lib/libc/rpc/pmap_rmt.c,v 1.20 2004/10/16 06:11:35 obrien Exp $
32 * $DragonFly: src/lib/libc/rpc/pmap_rmt.c,v 1.5 2005/11/13 12:27:04 swildner Exp $
33 */
34
35 /*
36 * pmap_rmt.c
37 * Client interface to pmap rpc service.
38 * remote call and broadcast service
39 *
40 * Copyright (C) 1984, Sun Microsystems, Inc.
41 */
42
43 #include "namespace.h"
44 #include <sys/types.h>
45 #include <sys/ioctl.h>
46 #include <sys/poll.h>
47 #include <sys/socket.h>
48
49 #include <net/if.h>
50 #include <netinet/in.h>
51 #include <arpa/inet.h>
52
53 #include <assert.h>
54 #include <err.h>
55 #include <errno.h>
56 #include <stdio.h>
57 #include <string.h>
58 #include <unistd.h>
59
60 #include <rpc/rpc.h>
61 #include <rpc/pmap_prot.h>
62 #include <rpc/pmap_clnt.h>
63 #include <rpc/pmap_rmt.h>
64 #include "un-namespace.h"
65
66 static const struct timeval timeout = { 3, 0 };
67
68 /*
69 * pmapper remote-call-service interface.
70 * This routine is used to call the pmapper remote call service
71 * which will look up a service program in the port maps, and then
72 * remotely call that routine with the given parameters. This allows
73 * programs to do a lookup and call in one step.
74 */
75 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)76 pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
77 xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
78 struct timeval tout, u_long *port_ptr)
79 {
80 int sock = -1;
81 CLIENT *client;
82 struct rmtcallargs a;
83 struct rmtcallres r;
84 enum clnt_stat stat;
85
86 assert(addr != NULL);
87 assert(port_ptr != NULL);
88
89 addr->sin_port = htons(PMAPPORT);
90 client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
91 if (client != NULL) {
92 a.prog = prog;
93 a.vers = vers;
94 a.proc = proc;
95 a.args_ptr = argsp;
96 a.xdr_args = xdrargs;
97 r.port_ptr = port_ptr;
98 r.results_ptr = resp;
99 r.xdr_results = xdrres;
100 stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
101 (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
102 &r, tout);
103 CLNT_DESTROY(client);
104 } else {
105 stat = RPC_FAILED;
106 }
107 addr->sin_port = 0;
108 return (stat);
109 }
110
111
112 /*
113 * XDR remote call arguments
114 * written for XDR_ENCODE direction only
115 */
116 bool_t
xdr_rmtcall_args(XDR * xdrs,struct rmtcallargs * cap)117 xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
118 {
119 u_int lenposition, argposition, position;
120
121 assert(xdrs != NULL);
122 assert(cap != NULL);
123
124 if (xdr_u_long(xdrs, &(cap->prog)) &&
125 xdr_u_long(xdrs, &(cap->vers)) &&
126 xdr_u_long(xdrs, &(cap->proc))) {
127 lenposition = XDR_GETPOS(xdrs);
128 if (! xdr_u_long(xdrs, &(cap->arglen)))
129 return (FALSE);
130 argposition = XDR_GETPOS(xdrs);
131 if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
132 return (FALSE);
133 position = XDR_GETPOS(xdrs);
134 cap->arglen = (u_long)position - (u_long)argposition;
135 XDR_SETPOS(xdrs, lenposition);
136 if (! xdr_u_long(xdrs, &(cap->arglen)))
137 return (FALSE);
138 XDR_SETPOS(xdrs, position);
139 return (TRUE);
140 }
141 return (FALSE);
142 }
143
144 /*
145 * XDR remote call results
146 * written for XDR_DECODE direction only
147 */
148 bool_t
xdr_rmtcallres(XDR * xdrs,struct rmtcallres * crp)149 xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
150 {
151 caddr_t port_ptr;
152
153 assert(xdrs != NULL);
154 assert(crp != NULL);
155
156 port_ptr = (caddr_t)(void *)crp->port_ptr;
157 if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
158 (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
159 crp->port_ptr = (u_long *)(void *)port_ptr;
160 return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
161 }
162 return (FALSE);
163 }
164