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 | |
42 | int |
43 | getrpcport (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 | |