| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | } |