clnt_simple.c 3.4 KB

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  1. /* @(#)clnt_simple.c 2.2 88/08/01 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. #define __FORCE_GLIBC__
  31. #include <features.h>
  32. /*
  33. * clnt_simple.c
  34. * Simplified front end to rpc.
  35. *
  36. * Copyright (C) 1984, Sun Microsystems, Inc.
  37. */
  38. #include <stdio.h>
  39. #include <unistd.h>
  40. #include <rpc/rpc.h>
  41. #include <sys/socket.h>
  42. #include <netdb.h>
  43. #include <strings.h>
  44. static struct callrpc_private {
  45. CLIENT *client;
  46. int socket;
  47. int oldprognum, oldversnum, valid;
  48. char *oldhost;
  49. } *callrpc_private;
  50. int callrpc (const char *host, const u_long prognum,
  51. const u_long versnum, const u_long procnum,
  52. const xdrproc_t inproc, const char *in,
  53. const xdrproc_t outproc, char *out)
  54. {
  55. register struct callrpc_private *crp = callrpc_private;
  56. struct sockaddr_in server_addr;
  57. enum clnt_stat clnt_stat;
  58. struct hostent *hp;
  59. struct timeval timeout, tottimeout;
  60. if (crp == 0) {
  61. crp = (struct callrpc_private *) calloc(1, sizeof(*crp));
  62. if (crp == 0)
  63. return (0);
  64. callrpc_private = crp;
  65. }
  66. if (crp->oldhost == NULL) {
  67. crp->oldhost = malloc(256);
  68. crp->oldhost[0] = 0;
  69. crp->socket = RPC_ANYSOCK;
  70. }
  71. if (crp->valid && crp->oldprognum == prognum
  72. && crp->oldversnum == versnum &&
  73. strcmp(crp->oldhost, host) == 0)
  74. {
  75. /* reuse old client */
  76. } else {
  77. crp->valid = 0;
  78. (void) close(crp->socket);
  79. crp->socket = RPC_ANYSOCK;
  80. if (crp->client) {
  81. clnt_destroy(crp->client);
  82. crp->client = NULL;
  83. }
  84. if ((hp = gethostbyname(host)) == NULL)
  85. return ((int) RPC_UNKNOWNHOST);
  86. timeout.tv_usec = 0;
  87. timeout.tv_sec = 5;
  88. bcopy(hp->h_addr, (char *) &server_addr.sin_addr, hp->h_length);
  89. server_addr.sin_family = AF_INET;
  90. server_addr.sin_port = 0;
  91. if ((crp->client = clntudp_create(&server_addr,
  92. (u_long) prognum, (u_long) versnum,
  93. timeout, &crp->socket)) == NULL)
  94. return ((int) rpc_createerr.cf_stat);
  95. crp->valid = 1;
  96. crp->oldprognum = prognum;
  97. crp->oldversnum = versnum;
  98. (void) strcpy(crp->oldhost, host);
  99. }
  100. tottimeout.tv_sec = 25;
  101. tottimeout.tv_usec = 0;
  102. clnt_stat = clnt_call(crp->client, procnum, inproc, (char*)in,
  103. outproc, out, tottimeout);
  104. /*
  105. * if call failed, empty cache
  106. */
  107. if (clnt_stat != RPC_SUCCESS)
  108. crp->valid = 0;
  109. return ((int) clnt_stat);
  110. }