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 #define __FORCE_GLIBC
  38 #include <features.h>
  39
  40 #include <stdio.h>
  41 #include <unistd.h>
  42 #include <net/if.h>
  43 #include <sys/ioctl.h>
  44 #include <sys/socket.h>
  45 #include <netinet/in.h>
  46 #include <arpa/inet.h>
  47 #include <rpc/rpc.h>
  48 #include <rpc/pmap_prot.h>
  49 #include <rpc/pmap_clnt.h>
  50
  51
  52 /*
  53  * Same as get_myaddress, but we try to use the loopback
  54  * interface. portmap caches interfaces, and on DHCP clients,
  55  * it could be that only loopback is started at this time.
  56  */
  57 static bool_t
  58 __get_myaddress (struct sockaddr_in *addr)
  59 {
  60   int s;
  61   char buf[BUFSIZ];
  62   struct ifconf ifc;
  63   struct ifreq ifreq, *ifr;
  64   int len, loopback = 1;
  65
  66   if ((s = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
  67     {
  68       perror ("__get_myaddress: socket");
  69       exit (1);
  70     }
  71   ifc.ifc_len = sizeof (buf);
  72   ifc.ifc_buf = buf;
  73   if (ioctl (s, SIOCGIFCONF, (char *) &ifc) < 0)
  74     {
  75       perror (_("__get_myaddress: ioctl (get interface configuration)"));
  76       exit (1);
  77     }
  78
  79  again:
  80   ifr = ifc.ifc_req;
  81   for (len = ifc.ifc_len; len; len -= sizeof ifreq)
  82     {
  83       ifreq = *ifr;
  84       if (ioctl (s, SIOCGIFFLAGS, (char *) &ifreq) < 0)
  85         {
  86           perror ("__get_myaddress: ioctl");
  87           exit (1);
  88         }
  89       if ((ifreq.ifr_flags & IFF_UP) && (ifr->ifr_addr.sa_family == AF_INET)
  90           && ((ifreq.ifr_flags & IFF_LOOPBACK) || (loopback == 0)))
  91         {
  92           *addr = *((struct sockaddr_in *) &ifr->ifr_addr);
  93           addr->sin_port = htons (PMAPPORT);
  94           close (s);
  95           return TRUE;
  96         }
  97       ifr++;
  98     }
  99   if (loopback == 1)
 100     {
 101       loopback = 0;
 102       goto again;
 103     }
 104   close (s);
 105   return FALSE;
 106 }
 107
 108
 109 static const struct timeval timeout = {5, 0};
 110 static const struct timeval tottimeout = {60, 0};
 111
 112 /*
 113  * Set a mapping between program,version and port.
 114  * Calls the pmap service remotely to do the mapping.
 115  */
 116 bool_t
 117 pmap_set (u_long program, u_long version, int protocol, u_short port)
 118 {
 119   struct sockaddr_in myaddress;
 120   int _socket = -1;
 121   CLIENT *client;
 122   struct pmap parms;
 123   bool_t rslt;
 124
 125   if (!__get_myaddress (&myaddress))
 126     return FALSE;
 127   client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS,
 128                         timeout, &_socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
 129   if (client == (CLIENT *) NULL)
 130     return (FALSE);
 131   parms.pm_prog = program;
 132   parms.pm_vers = version;
 133   parms.pm_prot = protocol;
 134   parms.pm_port = port;
 135   if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)xdr_pmap, (caddr_t)&parms,
 136                  (xdrproc_t)xdr_bool, (caddr_t)&rslt,
 137                  tottimeout) != RPC_SUCCESS)
 138     {
 139       clnt_perror (client, _("Cannot register service"));
 140       rslt = FALSE;
 141     }
 142   CLNT_DESTROY (client);
 143   /* (void)close(_socket); CLNT_DESTROY closes it */
 144   return rslt;
 145 }
 146 libc_hidden_def (pmap_set)
 147
 148 /*
 149  * Remove the mapping between program,version and port.
 150  * Calls the pmap service remotely to do the un-mapping.
 151  */
 152 bool_t
 153 pmap_unset (u_long program, u_long version)
 154 {
 155   struct sockaddr_in myaddress;
 156   int _socket = -1;
 157   CLIENT *client;
 158   struct pmap parms;
 159   bool_t rslt;
 160
 161   if (!__get_myaddress (&myaddress))
 162     return FALSE;
 163   client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS,
 164                         timeout, &_socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
 165   if (client == (CLIENT *) NULL)
 166     return FALSE;
 167   parms.pm_prog = program;
 168   parms.pm_vers = version;
 169   parms.pm_port = parms.pm_prot = 0;
 170   CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)xdr_pmap, (caddr_t)&parms,
 171              (xdrproc_t)xdr_bool, (caddr_t)&rslt, tottimeout);
 172   CLNT_DESTROY (client);
 173   /* (void)close(_socket); CLNT_DESTROY already closed it */
 174   return rslt;
 175 }
 176 libc_hidden_def (pmap_unset)