| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* @(#)getrpcport.c 2.1 88/07/29 4.0 RPCSRC */ |
| 2 | /* |
| 3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
| 4 | * unrestricted use provided that this legend is included on all tape |
| 5 | * media and as a part of the software program in whole or part. Users |
| 6 | * may copy or modify Sun RPC without charge, but are not authorized |
| 7 | * to license or distribute it to anyone else except as part of a product or |
| 8 | * program developed by the user. |
| 9 | * |
| 10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
| 11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
| 12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
| 13 | * |
| 14 | * Sun RPC is provided with no support and without any obligation on the |
| 15 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
| 16 | * modification or enhancement. |
| 17 | * |
| 18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
| 19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
| 20 | * OR ANY PART THEREOF. |
| 21 | * |
| 22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
| 23 | * or profits or other special, indirect and consequential damages, even if |
| 24 | * Sun has been advised of the possibility of such damages. |
| 25 | * |
| 26 | * Sun Microsystems, Inc. |
| 27 | * 2550 Garcia Avenue |
| 28 | * Mountain View, California 94043 |
| 29 | */ |
| 30 | #if 0 |
| 31 | static char sccsid[] = "@(#)getrpcport.c 1.3 87/08/11 SMI"; |
| 32 | #endif |
| 33 | |
| 34 | /* |
| 35 | * Copyright (c) 1985 by Sun Microsystems, Inc. |
| 36 | */ |
| 37 | |
| 38 | #define __FORCE_GLIBC |
| 39 | #include <features.h> |
| 40 | |
| 41 | #include <alloca.h> |
| 42 | #include <errno.h> |
| 43 | #include <stdio.h> |
| 44 | #include <netdb.h> |
| 45 | #include <string.h> |
| 46 | #include <rpc/rpc.h> |
| 47 | #include <rpc/clnt.h> |
| 48 | #include <rpc/pmap_clnt.h> |
| 49 | #include <sys/socket.h> |
| 50 | |
| 51 | |
| 52 | int |
| 53 | getrpcport (const char *host, u_long prognum, u_long versnum, u_int proto) |
| 54 | { |
| 55 | struct sockaddr_in addr; |
| 56 | struct hostent hostbuf, *hp; |
| 57 | size_t buflen; |
| 58 | char *buffer; |
| 59 | int herr; |
| 60 | |
| 61 | buflen = 1024; |
| 62 | buffer = alloca (buflen); |
| 63 | while (gethostbyname_r (host, &hostbuf, buffer, buflen, &hp, &herr) != 0 |
| 64 | || hp == NULL) |
| 65 | if (herr != NETDB_INTERNAL || errno != ERANGE) |
| 66 | return 0; |
| 67 | else |
| 68 | { |
| 69 | /* Enlarge the buffer. */ |
| 70 | buflen *= 2; |
| 71 | buffer = alloca (buflen); |
| 72 | } |
| 73 | |
| 74 | memcpy ((char *) &addr.sin_addr, hp->h_addr, hp->h_length); |
| 75 | addr.sin_family = AF_INET; |
| 76 | addr.sin_port = 0; |
| 77 | return pmap_getport (&addr, prognum, versnum, proto); |
| 78 | } |