summaryrefslogtreecommitdiff
path: root/sunrpc/pmap_clnt.c
blob: 5d7d185766964340fca9d9468e0ac8945eb77c09 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 * pmap_clnt.c
 * Client interface to pmap rpc service.
 */

#include <stdio.h>
#include <unistd.h>
#include <libintl.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>

/*
 * Same as get_myaddress, but we try to use the loopback
 * interface. portmap caches interfaces, and on DHCP clients,
 * it could be that only loopback is started at this time.
 */
static bool_t
__get_myaddress (struct sockaddr_in *addr)
{
  struct ifaddrs *ifa;

  if (getifaddrs (&ifa) != 0)
    {
      perror ("get_myaddress: getifaddrs");
      exit (1);
    }

  int loopback = 1;
  struct ifaddrs *run;

 again:
  run = ifa;
  while (run != NULL)
    {
      if ((run->ifa_flags & IFF_UP)
	  && run->ifa_addr != NULL
	  && run->ifa_addr->sa_family == AF_INET
	  && ((run->ifa_flags & IFF_LOOPBACK) || loopback == 0))
	{
	  *addr = *((struct sockaddr_in *) run->ifa_addr);
	  addr->sin_port = htons (PMAPPORT);
	  goto out;
	}

      run = run->ifa_next;
    }

  if (loopback == 1)
    {
      loopback = 0;
      goto again;
    }
 out:
  freeifaddrs (ifa);

  return run == NULL ? FALSE : TRUE;
}


static const struct timeval timeout = {5, 0};
static const struct timeval tottimeout = {60, 0};

/*
 * Set a mapping between program,version and port.
 * Calls the pmap service remotely to do the mapping.
 */
bool_t
pmap_set (u_long program, u_long version, int protocol, u_short port)
{
  struct sockaddr_in myaddress;
  int socket = -1;
  CLIENT *client;
  struct pmap parms;
  bool_t rslt;

  if (!__get_myaddress (&myaddress))
    return FALSE;
  client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket,
			      RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  if (client == (CLIENT *) NULL)
    return (FALSE);
  parms.pm_prog = program;
  parms.pm_vers = version;
  parms.pm_prot = protocol;
  parms.pm_port = port;
  if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)xdr_pmap,
		 (caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt,
		 tottimeout) != RPC_SUCCESS)
    {
      clnt_perror (client, _("Cannot register service"));
      rslt = FALSE;
    }
  CLNT_DESTROY (client);
  /* (void)close(socket); CLNT_DESTROY closes it */
  return rslt;
}
libc_hidden_nolink_sunrpc (pmap_set, GLIBC_2_0)

/*
 * Remove the mapping between program,version and port.
 * Calls the pmap service remotely to do the un-mapping.
 */
bool_t
pmap_unset (u_long program, u_long version)
{
  struct sockaddr_in myaddress;
  int socket = -1;
  CLIENT *client;
  struct pmap parms;
  bool_t rslt;

  if (!__get_myaddress (&myaddress))
    return FALSE;
  client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket,
			      RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  if (client == (CLIENT *) NULL)
    return FALSE;
  parms.pm_prog = program;
  parms.pm_vers = version;
  parms.pm_port = parms.pm_prot = 0;
  CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)xdr_pmap,
	     (caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt,
	     tottimeout);
  CLNT_DESTROY (client);
  /* (void)close(socket); CLNT_DESTROY already closed it */
  return rslt;
}
libc_hidden_nolink_sunrpc (pmap_unset, GLIBC_2_0)