getrpcport.c 2.3 KB

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  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. * Copyright (c) 1985 by Sun Microsystems, Inc.
  35. */
  36. #define pmap_getport __pmap_getport
  37. #define __FORCE_GLIBC
  38. #include <features.h>
  39. #include <alloca.h>
  40. #include <errno.h>
  41. #include <stdio.h>
  42. #include <netdb.h>
  43. #include <string.h>
  44. #include <rpc/rpc.h>
  45. #include <rpc/clnt.h>
  46. #include <rpc/pmap_clnt.h>
  47. #include <sys/socket.h>
  48. int
  49. getrpcport (const char *host, u_long prognum, u_long versnum, u_int proto)
  50. {
  51. struct sockaddr_in addr;
  52. struct hostent hostbuf, *hp;
  53. size_t buflen;
  54. char *buffer;
  55. int herr;
  56. buflen = 1024;
  57. buffer = alloca (buflen);
  58. while (gethostbyname_r (host, &hostbuf, buffer, buflen, &hp, &herr) != 0
  59. || hp == NULL)
  60. if (herr != NETDB_INTERNAL || errno != ERANGE)
  61. return 0;
  62. else
  63. {
  64. /* Enlarge the buffer. */
  65. buflen *= 2;
  66. buffer = alloca (buflen);
  67. }
  68. __memcpy ((char *) &addr.sin_addr, hp->h_addr, hp->h_length);
  69. addr.sin_family = AF_INET;
  70. addr.sin_port = 0;
  71. return pmap_getport (&addr, prognum, versnum, proto);
  72. }