1/*
2 * Copyright (c) 2010, Oracle America, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following
12 * disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 * * Neither the name of the "Oracle America, 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
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
25 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31/*
32 * pmap_clnt.c
33 * Client interface to pmap rpc service.
34 */
35
36#include <stdio.h>
37#include <unistd.h>
38#include <libintl.h>
39#include <net/if.h>
40#include <ifaddrs.h>
41#include <sys/ioctl.h>
42#include <sys/socket.h>
43#include <netinet/in.h>
44#include <arpa/inet.h>
45#include <rpc/rpc.h>
46#include <rpc/pmap_prot.h>
47#include <rpc/pmap_clnt.h>
48
49/*
50 * Same as get_myaddress, but we try to use the loopback
51 * interface. portmap caches interfaces, and on DHCP clients,
52 * it could be that only loopback is started at this time.
53 */
54static bool_t
55__get_myaddress (struct sockaddr_in *addr)
56{
57 struct ifaddrs *ifa;
58
59 if (getifaddrs (&ifa) != 0)
60 {
61 perror ("get_myaddress: getifaddrs");
62 exit (1);
63 }
64
65 int loopback = 1;
66 struct ifaddrs *run;
67
68 again:
69 run = ifa;
70 while (run != NULL)
71 {
72 if ((run->ifa_flags & IFF_UP)
73 && run->ifa_addr != NULL
74 && run->ifa_addr->sa_family == AF_INET
75 && ((run->ifa_flags & IFF_LOOPBACK) || loopback == 0))
76 {
77 *addr = *((struct sockaddr_in *) run->ifa_addr);
78 addr->sin_port = htons (PMAPPORT);
79 goto out;
80 }
81
82 run = run->ifa_next;
83 }
84
85 if (loopback == 1)
86 {
87 loopback = 0;
88 goto again;
89 }
90 out:
91 freeifaddrs (ifa);
92
93 return run == NULL ? FALSE : TRUE;
94}
95
96
97static const struct timeval timeout = {5, 0};
98static const struct timeval tottimeout = {60, 0};
99
100/*
101 * Set a mapping between program,version and port.
102 * Calls the pmap service remotely to do the mapping.
103 */
104bool_t
105pmap_set (u_long program, u_long version, int protocol, u_short port)
106{
107 struct sockaddr_in myaddress;
108 int socket = -1;
109 CLIENT *client;
110 struct pmap parms;
111 bool_t rslt;
112
113 if (!__get_myaddress (&myaddress))
114 return FALSE;
115 client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket,
116 RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
117 if (client == (CLIENT *) NULL)
118 return (FALSE);
119 parms.pm_prog = program;
120 parms.pm_vers = version;
121 parms.pm_prot = protocol;
122 parms.pm_port = port;
123 if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)xdr_pmap,
124 (caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt,
125 tottimeout) != RPC_SUCCESS)
126 {
127 clnt_perror (client, _("Cannot register service"));
128 rslt = FALSE;
129 }
130 CLNT_DESTROY (client);
131 /* (void)close(socket); CLNT_DESTROY closes it */
132 return rslt;
133}
134libc_hidden_nolink_sunrpc (pmap_set, GLIBC_2_0)
135
136/*
137 * Remove the mapping between program,version and port.
138 * Calls the pmap service remotely to do the un-mapping.
139 */
140bool_t
141pmap_unset (u_long program, u_long version)
142{
143 struct sockaddr_in myaddress;
144 int socket = -1;
145 CLIENT *client;
146 struct pmap parms;
147 bool_t rslt;
148
149 if (!__get_myaddress (&myaddress))
150 return FALSE;
151 client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket,
152 RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
153 if (client == (CLIENT *) NULL)
154 return FALSE;
155 parms.pm_prog = program;
156 parms.pm_vers = version;
157 parms.pm_port = parms.pm_prot = 0;
158 CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)xdr_pmap,
159 (caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt,
160 tottimeout);
161 CLNT_DESTROY (client);
162 /* (void)close(socket); CLNT_DESTROY already closed it */
163 return rslt;
164}
165libc_hidden_nolink_sunrpc (pmap_unset, GLIBC_2_0)
166