clnt_simple.c 4.7 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. #if 0
  31. static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
  32. #endif
  33. /*
  34. * clnt_simple.c
  35. * Simplified front end to rpc.
  36. *
  37. * Copyright (C) 1984, Sun Microsystems, Inc.
  38. */
  39. #define __FORCE_GLIBC
  40. #include <features.h>
  41. #include <alloca.h>
  42. #include <errno.h>
  43. #include <stdio.h>
  44. #include <unistd.h>
  45. #include "rpc_private.h"
  46. #include <sys/socket.h>
  47. #include <netdb.h>
  48. #include <string.h>
  49. /* Experimentally off - libc_hidden_proto(memcpy) */
  50. /* Experimentally off - libc_hidden_proto(strcmp) */
  51. /* Experimentally off - libc_hidden_proto(strncpy) */
  52. /* libc_hidden_proto(close) */
  53. /* libc_hidden_proto(clntudp_create) */
  54. /* libc_hidden_proto(gethostbyname_r) */
  55. struct callrpc_private_s
  56. {
  57. CLIENT *client;
  58. int socket;
  59. u_long oldprognum, oldversnum, valid;
  60. char *oldhost;
  61. };
  62. #ifdef __UCLIBC_HAS_THREADS__
  63. #define callrpc_private (*(struct callrpc_private_s **)&RPC_THREAD_VARIABLE(callrpc_private_s))
  64. #else
  65. static struct callrpc_private_s *callrpc_private;
  66. #endif
  67. int
  68. callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum,
  69. xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out)
  70. {
  71. struct callrpc_private_s *crp = callrpc_private;
  72. struct sockaddr_in server_addr;
  73. enum clnt_stat clnt_stat;
  74. struct hostent hostbuf, *hp;
  75. struct timeval timeout, tottimeout;
  76. if (crp == 0)
  77. {
  78. crp = (struct callrpc_private_s *) calloc (1, sizeof (*crp));
  79. if (crp == 0)
  80. return 0;
  81. callrpc_private = crp;
  82. }
  83. if (crp->oldhost == NULL)
  84. {
  85. crp->oldhost = malloc (256);
  86. crp->oldhost[0] = 0;
  87. crp->socket = RPC_ANYSOCK;
  88. }
  89. if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
  90. && strcmp (crp->oldhost, host) == 0)
  91. {
  92. /* reuse old client */
  93. }
  94. else
  95. {
  96. size_t buflen;
  97. char *buffer;
  98. int herr;
  99. crp->valid = 0;
  100. if (crp->socket != RPC_ANYSOCK)
  101. {
  102. (void) close (crp->socket);
  103. crp->socket = RPC_ANYSOCK;
  104. }
  105. if (crp->client)
  106. {
  107. clnt_destroy (crp->client);
  108. crp->client = NULL;
  109. }
  110. buflen = 1024;
  111. buffer = alloca (buflen);
  112. while (gethostbyname_r (host, &hostbuf, buffer, buflen,
  113. &hp, &herr) != 0
  114. || hp == NULL)
  115. if (herr != NETDB_INTERNAL || errno != ERANGE)
  116. return (int) RPC_UNKNOWNHOST;
  117. else
  118. {
  119. /* Enlarge the buffer. */
  120. buflen *= 2;
  121. buffer = alloca (buflen);
  122. }
  123. timeout.tv_usec = 0;
  124. timeout.tv_sec = 5;
  125. memcpy ((char *) &server_addr.sin_addr, hp->h_addr, hp->h_length);
  126. server_addr.sin_family = AF_INET;
  127. server_addr.sin_port = 0;
  128. if ((crp->client = clntudp_create (&server_addr, (u_long) prognum,
  129. (u_long) versnum, timeout, &crp->socket)) == NULL)
  130. return (int) get_rpc_createerr().cf_stat;
  131. crp->valid = 1;
  132. crp->oldprognum = prognum;
  133. crp->oldversnum = versnum;
  134. (void) strncpy (crp->oldhost, host, 255);
  135. crp->oldhost[255] = '\0';
  136. }
  137. tottimeout.tv_sec = 25;
  138. tottimeout.tv_usec = 0;
  139. clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in,
  140. outproc, out, tottimeout);
  141. /*
  142. * if call failed, empty cache
  143. */
  144. if (clnt_stat != RPC_SUCCESS)
  145. crp->valid = 0;
  146. return (int) clnt_stat;
  147. }
  148. #ifdef __UCLIBC_HAS_THREADS__
  149. void attribute_hidden __rpc_thread_clnt_cleanup (void)
  150. {
  151. struct callrpc_private_s *rcp = RPC_THREAD_VARIABLE(callrpc_private_s);
  152. if (rcp) {
  153. if (rcp->client)
  154. CLNT_DESTROY (rcp->client);
  155. free (rcp);
  156. }
  157. }
  158. #endif /* __UCLIBC_HAS_THREADS__ */