pmap_clnt.c 4.8 KB

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  1. /*
  2. * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  3. * unrestricted use provided that this legend is included on all tape
  4. * media and as a part of the software program in whole or part. Users
  5. * may copy or modify Sun RPC without charge, but are not authorized
  6. * to license or distribute it to anyone else except as part of a product or
  7. * program developed by the user.
  8. *
  9. * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10. * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11. * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12. *
  13. * Sun RPC is provided with no support and without any obligation on the
  14. * part of Sun Microsystems, Inc. to assist in its use, correction,
  15. * modification or enhancement.
  16. *
  17. * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18. * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19. * OR ANY PART THEREOF.
  20. *
  21. * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22. * or profits or other special, indirect and consequential damages, even if
  23. * Sun has been advised of the possibility of such damages.
  24. *
  25. * Sun Microsystems, Inc.
  26. * 2550 Garcia Avenue
  27. * Mountain View, California 94043
  28. */
  29. /*
  30. * Copyright (C) 1984, Sun Microsystems, Inc.
  31. */
  32. /*
  33. * pmap_clnt.c
  34. * Client interface to pmap rpc service.
  35. */
  36. #define __FORCE_GLIBC
  37. #include <features.h>
  38. #include <stdio.h>
  39. #include <unistd.h>
  40. #include <net/if.h>
  41. #include <sys/ioctl.h>
  42. #include <sys/socket.h>
  43. #include <netinet/in.h>
  44. #include <arpa/inet.h>
  45. #include <rpc/rpc.h>
  46. #include <rpc/pmap_prot.h>
  47. #include <rpc/pmap_clnt.h>
  48. /*
  49. * Same as get_myaddress, but we try to use the loopback
  50. * interface. portmap caches interfaces, and on DHCP clients,
  51. * it could be that only loopback is started at this time.
  52. */
  53. static bool_t
  54. __get_myaddress (struct sockaddr_in *addr)
  55. {
  56. int s;
  57. char buf[BUFSIZ];
  58. struct ifconf ifc;
  59. struct ifreq ifreq, *ifr;
  60. int len, loopback = 1;
  61. if ((s = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
  62. {
  63. perror ("__get_myaddress: socket");
  64. exit (1);
  65. }
  66. ifc.ifc_len = sizeof (buf);
  67. ifc.ifc_buf = buf;
  68. if (ioctl (s, SIOCGIFCONF, (char *) &ifc) < 0)
  69. {
  70. perror (_("__get_myaddress: ioctl (get interface configuration)"));
  71. exit (1);
  72. }
  73. again:
  74. ifr = ifc.ifc_req;
  75. for (len = ifc.ifc_len; len; len -= sizeof ifreq)
  76. {
  77. ifreq = *ifr;
  78. if (ioctl (s, SIOCGIFFLAGS, (char *) &ifreq) < 0)
  79. {
  80. perror ("__get_myaddress: ioctl");
  81. exit (1);
  82. }
  83. if ((ifreq.ifr_flags & IFF_UP) && (ifr->ifr_addr.sa_family == AF_INET)
  84. && ((ifreq.ifr_flags & IFF_LOOPBACK) || (loopback == 0)))
  85. {
  86. *addr = *((struct sockaddr_in *) &ifr->ifr_addr);
  87. addr->sin_port = htons (PMAPPORT);
  88. close (s);
  89. return TRUE;
  90. }
  91. ifr++;
  92. }
  93. if (loopback == 1)
  94. {
  95. loopback = 0;
  96. goto again;
  97. }
  98. close (s);
  99. return FALSE;
  100. }
  101. static const struct timeval timeout = {5, 0};
  102. static const struct timeval tottimeout = {60, 0};
  103. /*
  104. * Set a mapping between program,version and port.
  105. * Calls the pmap service remotely to do the mapping.
  106. */
  107. bool_t
  108. pmap_set (u_long program, u_long version, int protocol, u_short port)
  109. {
  110. struct sockaddr_in myaddress;
  111. int _socket = -1;
  112. CLIENT *client;
  113. struct pmap parms;
  114. bool_t rslt;
  115. if (!__get_myaddress (&myaddress))
  116. return FALSE;
  117. client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS,
  118. timeout, &_socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  119. if (client == (CLIENT *) NULL)
  120. return (FALSE);
  121. parms.pm_prog = program;
  122. parms.pm_vers = version;
  123. parms.pm_prot = protocol;
  124. parms.pm_port = port;
  125. if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)xdr_pmap, (caddr_t)&parms,
  126. (xdrproc_t)xdr_bool, (caddr_t)&rslt,
  127. tottimeout) != RPC_SUCCESS)
  128. {
  129. clnt_perror (client, _("Cannot register service"));
  130. rslt = FALSE;
  131. }
  132. CLNT_DESTROY (client);
  133. /* (void)close(_socket); CLNT_DESTROY closes it */
  134. return rslt;
  135. }
  136. libc_hidden_def (pmap_set)
  137. /*
  138. * Remove the mapping between program,version and port.
  139. * Calls the pmap service remotely to do the un-mapping.
  140. */
  141. bool_t
  142. pmap_unset (u_long program, u_long version)
  143. {
  144. struct sockaddr_in myaddress;
  145. int _socket = -1;
  146. CLIENT *client;
  147. struct pmap parms;
  148. bool_t rslt;
  149. if (!__get_myaddress (&myaddress))
  150. return FALSE;
  151. client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS,
  152. timeout, &_socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
  153. if (client == (CLIENT *) NULL)
  154. return FALSE;
  155. parms.pm_prog = program;
  156. parms.pm_vers = version;
  157. parms.pm_port = parms.pm_prot = 0;
  158. CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)xdr_pmap, (caddr_t)&parms,
  159. (xdrproc_t)xdr_bool, (caddr_t)&rslt, tottimeout);
  160. CLNT_DESTROY (client);
  161. /* (void)close(_socket); CLNT_DESTROY already closed it */
  162. return rslt;
  163. }
  164. libc_hidden_def (pmap_unset)