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) && run->ifa_addr->sa_family == AF_INET
  74           && ((run->ifa_flags & IFF_LOOPBACK) || loopback == 0))
  75         {
  76           *addr = *((struct sockaddr_in *) run->ifa_addr);
  77           addr->sin_port = htons (PMAPPORT);
  78           goto out;
  79         }
  80
  81       run = run->ifa_next;
  82     }
  83
  84   if (loopback == 1)
  85     {
  86       loopback = 0;
  87       goto again;
  88     }
  89  out:
  90   freeifaddrs (ifa);
  91
  92   return run == NULL ? FALSE : TRUE;
  93 }
  94
  95
  96 static const struct timeval timeout = {5, 0};
  97 static const struct timeval tottimeout = {60, 0};
  98
  99 /*
 100  * Set a mapping between program,version and port.
 101  * Calls the pmap service remotely to do the mapping.
 102  */
 103 bool_t
 104 pmap_set (u_long program, u_long version, int protocol, u_short port)
 105 {
 106   struct sockaddr_in myaddress;
 107   int socket = -1;
 108   CLIENT *client;
 109   struct pmap parms;
 110   bool_t rslt;
 111
 112   if (!__get_myaddress (&myaddress))
 113     return FALSE;
 114   client = INTUSE(clntudp_bufcreate) (&myaddress, PMAPPROG, PMAPVERS,
 115                                       timeout, &socket, RPCSMALLMSGSIZE,
 116                                       RPCSMALLMSGSIZE);
 117   if (client == (CLIENT *) NULL)
 118     return (FALSE);
 119   parms.pm_prog = program;
 120   parms.pm_vers = version;
 121   parms.pm_prot = protocol;
 122   parms.pm_port = port;
 123   if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)INTUSE(xdr_pmap),
 124                  (caddr_t)&parms, (xdrproc_t)INTUSE(xdr_bool), (caddr_t)&rslt,
 125                  tottimeout) != RPC_SUCCESS)
 126     {
 127       clnt_perror (client, _("Cannot register service"));
 128       rslt = FALSE;
 129     }
 130   CLNT_DESTROY (client);
 131   /* (void)close(socket); CLNT_DESTROY closes it */
 132   return rslt;
 133 }
 134 libc_hidden_def (pmap_set)
 135
 136 /*
 137  * Remove the mapping between program,version and port.
 138  * Calls the pmap service remotely to do the un-mapping.
 139  */
 140 bool_t
 141 pmap_unset (u_long program, u_long version)
 142 {
 143   struct sockaddr_in myaddress;
 144   int socket = -1;
 145   CLIENT *client;
 146   struct pmap parms;
 147   bool_t rslt;
 148
 149   if (!__get_myaddress (&myaddress))
 150     return FALSE;
 151   client = INTUSE(clntudp_bufcreate) (&myaddress, PMAPPROG, PMAPVERS,
 152                                       timeout, &socket, RPCSMALLMSGSIZE,
 153                                       RPCSMALLMSGSIZE);
 154   if (client == (CLIENT *) NULL)
 155     return FALSE;
 156   parms.pm_prog = program;
 157   parms.pm_vers = version;
 158   parms.pm_port = parms.pm_prot = 0;
 159   CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)INTUSE(xdr_pmap),
 160              (caddr_t)&parms, (xdrproc_t)INTUSE(xdr_bool), (caddr_t)&rslt,
 161              tottimeout);
 162   CLNT_DESTROY (client);
 163   /* (void)close(socket); CLNT_DESTROY already closed it */
 164   return rslt;
 165 }
 166 libc_hidden_def (pmap_unset)