lib/libc/rpc/pmap_rmt.c

   1 /*      $NetBSD: pmap_rmt.c,v 1.28 2000/06/02 23:11:12 fvdl Exp $       */
   2
   3 /*
   4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   5  * unrestricted use provided that this legend is included on all tape
   6  * media and as a part of the software program in whole or part.  Users
   7  * may copy or modify Sun RPC without charge, but are not authorized
   8  * to license or distribute it to anyone else except as part of a product or
   9  * program developed by the user.
  10  *
  11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  14  *
  15  * Sun RPC is provided with no support and without any obligation on the
  16  * part of Sun Microsystems, Inc. to assist in its use, correction,
  17  * modification or enhancement.
  18  *
  19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  21  * OR ANY PART THEREOF.
  22  *
  23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  24  * or profits or other special, indirect and consequential damages, even if
  25  * Sun has been advised of the possibility of such damages.
  26  *
  27  * Sun Microsystems, Inc.
  28  * 2550 Garcia Avenue
  29  * Mountain View, California  94043
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 #if 0
  35 static char *sccsid = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
  36 static char *sccsid = "@(#)pmap_rmt.c   2.2 88/08/01 4.0 RPCSRC";
  37 #else
  38 __RCSID("$NetBSD: pmap_rmt.c,v 1.28 2000/06/02 23:11:12 fvdl Exp $");
  39 #endif
  40 #endif
  41
  42 /*
  43  * pmap_rmt.c
  44  * Client interface to pmap rpc service.
  45  * remote call and broadcast service
  46  *
  47  * Copyright (C) 1984, Sun Microsystems, Inc.
  48  */
  49
  50 #include "namespace.h"
  51
  52 #include <sys/types.h>
  53 #include <sys/ioctl.h>
  54 #include <sys/poll.h>
  55 #include <sys/socket.h>
  56
  57 #include <net/if.h>
  58 #include <netinet/in.h>
  59 #include <arpa/inet.h>
  60
  61 #include <assert.h>
  62 #include <err.h>
  63 #include <errno.h>
  64 #include <stdio.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67
  68 #include <rpc/rpc.h>
  69 #include <rpc/pmap_prot.h>
  70 #include <rpc/pmap_clnt.h>
  71 #include <rpc/pmap_rmt.h>
  72
  73 #ifdef __weak_alias
  74 __weak_alias(pmap_rmtcall,_pmap_rmtcall)
  75 __weak_alias(xdr_rmtcall_args,_xdr_rmtcall_args)
  76 __weak_alias(xdr_rmtcallres,_xdr_rmtcallres)
  77 #endif
  78
  79 static const struct timeval timeout = { 3, 0 };
  80
  81 /*
  82  * pmapper remote-call-service interface.
  83  * This routine is used to call the pmapper remote call service
  84  * which will look up a service program in the port maps, and then
  85  * remotely call that routine with the given parameters.  This allows
  86  * programs to do a lookup and call in one step.
  87 */
  88 enum clnt_stat
  89 pmap_rmtcall(addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout,
  90     port_ptr)
  91         struct sockaddr_in *addr;
  92         u_long prog, vers, proc;
  93         xdrproc_t xdrargs, xdrres;
  94         caddr_t argsp, resp;
  95         struct timeval tout;
  96         u_long *port_ptr;
  97 {
  98         int sock = -1;
  99         CLIENT *client;
 100         struct rmtcallargs a;
 101         struct rmtcallres r;
 102         enum clnt_stat stat;
 103
 104         _DIAGASSERT(addr != NULL);
 105         _DIAGASSERT(port_ptr != NULL);
 106
 107         addr->sin_port = htons(PMAPPORT);
 108         client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
 109         if (client != NULL) {
 110                 a.prog = prog;
 111                 a.vers = vers;
 112                 a.proc = proc;
 113                 a.args_ptr = argsp;
 114                 a.xdr_args = xdrargs;
 115                 r.port_ptr = port_ptr;
 116                 r.results_ptr = resp;
 117                 r.xdr_results = xdrres;
 118                 stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
 119                     (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
 120                     &r, tout);
 121                 CLNT_DESTROY(client);
 122         } else {
 123                 stat = RPC_FAILED;
 124         }
 125         addr->sin_port = 0;
 126         return (stat);
 127 }
 128
 129
 130 /*
 131  * XDR remote call arguments
 132  * written for XDR_ENCODE direction only
 133  */
 134 bool_t
 135 xdr_rmtcall_args(xdrs, cap)
 136         XDR *xdrs;
 137         struct rmtcallargs *cap;
 138 {
 139         u_int lenposition, argposition, position;
 140
 141         _DIAGASSERT(xdrs != NULL);
 142         _DIAGASSERT(cap != NULL);
 143
 144         if (xdr_u_long(xdrs, &(cap->prog)) &&
 145             xdr_u_long(xdrs, &(cap->vers)) &&
 146             xdr_u_long(xdrs, &(cap->proc))) {
 147                 lenposition = XDR_GETPOS(xdrs);
 148                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 149                     return (FALSE);
 150                 argposition = XDR_GETPOS(xdrs);
 151                 if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
 152                     return (FALSE);
 153                 position = XDR_GETPOS(xdrs);
 154                 cap->arglen = (u_long)position - (u_long)argposition;
 155                 XDR_SETPOS(xdrs, lenposition);
 156                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 157                     return (FALSE);
 158                 XDR_SETPOS(xdrs, position);
 159                 return (TRUE);
 160         }
 161         return (FALSE);
 162 }
 163
 164 /*
 165  * XDR remote call results
 166  * written for XDR_DECODE direction only
 167  */
 168 bool_t
 169 xdr_rmtcallres(xdrs, crp)
 170         XDR *xdrs;
 171         struct rmtcallres *crp;
 172 {
 173         caddr_t port_ptr;
 174
 175         _DIAGASSERT(xdrs != NULL);
 176         _DIAGASSERT(crp != NULL);
 177
 178         port_ptr = (caddr_t)(void *)crp->port_ptr;
 179         if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
 180             (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
 181                 crp->port_ptr = (u_long *)(void *)port_ptr;
 182                 return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
 183         }
 184         return (FALSE);
 185 }