sunrpc/pmap_clnt.c

   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
  37 #include <stdio.h>
  38 #include <unistd.h>
  39 #include <libintl.h>
  40 #include <net/if.h>
  41 #include <ifaddrs.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/socket.h>
  44 #include <netinet/in.h>
  45 #include <arpa/inet.h>
  46 #include <rpc/rpc.h>
  47 #include <rpc/pmap_prot.h>
  48 #include <rpc/pmap_clnt.h>
  49
  50 /*
  51  * Same as get_myaddress, but we try to use the loopback
  52  * interface. portmap caches interfaces, and on DHCP clients,
  53  * it could be that only loopback is started at this time.
  54  */
  55 static bool_t
  56 __get_myaddress (struct sockaddr_in *addr)
  57 {
  58   struct ifaddrs *ifa;
  59
  60   if (getifaddrs (&ifa) != 0)
  61     {
  62       perror ("get_myaddress: getifaddrs");
  63       exit (1);
  64     }
  65
  66   int loopback = 1;
  67   struct ifaddrs *run;
  68
  69  again:
  70   run = ifa;
  71   while (run != NULL)
  72     {
  73       if ((run->ifa_flags & IFF_UP)
  74           && run->ifa_addr != NULL
  75           && run->ifa_addr->sa_family == AF_INET
  76           && ((run->ifa_flags & IFF_LOOPBACK) || loopback == 0))
  77         {
  78           *addr = *((struct sockaddr_in *) run->ifa_addr);
  79           addr->sin_port = htons (PMAPPORT);
  80           goto out;
  81         }
  82
  83       run = run->ifa_next;
  84     }
  85
  86   if (loopback == 1)
  87     {
  88       loopback = 0;
  89       goto again;
  90     }
  91  out:
  92   freeifaddrs (ifa);
  93
  94   return run == NULL ? FALSE : TRUE;
  95 }
  96
  97
  98 static const struct timeval timeout = {5, 0};
  99 static const struct timeval tottimeout = {60, 0};
 100
 101 /*
 102  * Set a mapping between program,version and port.
 103  * Calls the pmap service remotely to do the mapping.
 104  */
 105 bool_t
 106 pmap_set (u_long program, u_long version, int protocol, u_short port)
 107 {
 108   struct sockaddr_in myaddress;
 109   int socket = -1;
 110   CLIENT *client;
 111   struct pmap parms;
 112   bool_t rslt;
 113
 114   if (!__get_myaddress (&myaddress))
 115     return FALSE;
 116   client = INTUSE(clntudp_bufcreate) (&myaddress, PMAPPROG, PMAPVERS,
 117                                       timeout, &socket, RPCSMALLMSGSIZE,
 118                                       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)INTUSE(xdr_pmap),
 126                  (caddr_t)&parms, (xdrproc_t)INTUSE(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 /*
 139  * Remove the mapping between program,version and port.
 140  * Calls the pmap service remotely to do the un-mapping.
 141  */
 142 bool_t
 143 pmap_unset (u_long program, u_long version)
 144 {
 145   struct sockaddr_in myaddress;
 146   int socket = -1;
 147   CLIENT *client;
 148   struct pmap parms;
 149   bool_t rslt;
 150
 151   if (!__get_myaddress (&myaddress))
 152     return FALSE;
 153   client = INTUSE(clntudp_bufcreate) (&myaddress, PMAPPROG, PMAPVERS,
 154                                       timeout, &socket, RPCSMALLMSGSIZE,
 155                                       RPCSMALLMSGSIZE);
 156   if (client == (CLIENT *) NULL)
 157     return FALSE;
 158   parms.pm_prog = program;
 159   parms.pm_vers = version;
 160   parms.pm_port = parms.pm_prot = 0;
 161   CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)INTUSE(xdr_pmap),
 162              (caddr_t)&parms, (xdrproc_t)INTUSE(xdr_bool), (caddr_t)&rslt,
 163              tottimeout);
 164   CLNT_DESTROY (client);
 165   /* (void)close(socket); CLNT_DESTROY already closed it */
 166   return rslt;
 167 }
 168 libc_hidden_def (pmap_unset)