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#include <alloca.h>
33#include <errno.h>
34#include <stdio.h>
35#include <netdb.h>
36#include <string.h>
37#include <rpc/rpc.h>
38#include <rpc/clnt.h>
39#include <rpc/pmap_clnt.h>
40#include <sys/socket.h>
41
42int
43getrpcport (const char *host, u_long prognum, u_long versnum, u_int proto)
44{
45 struct sockaddr_in addr;
46 struct hostent hostbuf, *hp;
47 size_t buflen;
48 char *buffer;
49 int herr;
50
51 buflen = 1024;
52 buffer = __alloca (buflen);
53 while (__gethostbyname_r (host, &hostbuf, buffer, buflen, &hp, &herr) != 0
54 || hp == NULL)
55 if (herr != NETDB_INTERNAL || errno != ERANGE)
56 return 0;
57 else
58 {
59 /* Enlarge the buffer. */
60 buflen *= 2;
61 buffer = __alloca (buflen);
62 }
63
64 memcpy ((char *) &addr.sin_addr, hp->h_addr, hp->h_length);
65 addr.sin_family = AF_INET;
66 addr.sin_port = 0;
67 return pmap_getport (&addr, prognum, versnum, proto);
68}
69