lib/libc/rpc/pmap_rmt.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  * @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro
  30  * @(#)pmap_rmt.c       2.2 88/08/01 4.0 RPCSRC
  31  * $NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos Exp $
  32  * $FreeBSD: src/lib/libc/rpc/pmap_rmt.c,v 1.20 2004/10/16 06:11:35 obrien Exp $
  33  * $DragonFly: src/lib/libc/rpc/pmap_rmt.c,v 1.5 2005/11/13 12:27:04 swildner Exp $
  34  */
  35
  36 /*
  37  * pmap_rmt.c
  38  * Client interface to pmap rpc service.
  39  * remote call and broadcast service
  40  *
  41  * Copyright (C) 1984, Sun Microsystems, Inc.
  42  */
  43
  44 #include "namespace.h"
  45 #include <sys/types.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/poll.h>
  48 #include <sys/socket.h>
  49
  50 #include <net/if.h>
  51 #include <netinet/in.h>
  52 #include <arpa/inet.h>
  53
  54 #include <assert.h>
  55 #include <err.h>
  56 #include <errno.h>
  57 #include <stdio.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60
  61 #include <rpc/rpc.h>
  62 #include <rpc/pmap_prot.h>
  63 #include <rpc/pmap_clnt.h>
  64 #include <rpc/pmap_rmt.h>
  65 #include "un-namespace.h"
  66
  67 static const struct timeval timeout = { 3, 0 };
  68
  69 /*
  70  * pmapper remote-call-service interface.
  71  * This routine is used to call the pmapper remote call service
  72  * which will look up a service program in the port maps, and then
  73  * remotely call that routine with the given parameters.  This allows
  74  * programs to do a lookup and call in one step.
  75 */
  76 enum clnt_stat
  77 pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
  78              xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
  79              struct timeval tout, u_long *port_ptr)
  80 {
  81         int sock = -1;
  82         CLIENT *client;
  83         struct rmtcallargs a;
  84         struct rmtcallres r;
  85         enum clnt_stat stat;
  86
  87         assert(addr != NULL);
  88         assert(port_ptr != NULL);
  89
  90         addr->sin_port = htons(PMAPPORT);
  91         client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
  92         if (client != NULL) {
  93                 a.prog = prog;
  94                 a.vers = vers;
  95                 a.proc = proc;
  96                 a.args_ptr = argsp;
  97                 a.xdr_args = xdrargs;
  98                 r.port_ptr = port_ptr;
  99                 r.results_ptr = resp;
 100                 r.xdr_results = xdrres;
 101                 stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
 102                     (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
 103                     &r, tout);
 104                 CLNT_DESTROY(client);
 105         } else {
 106                 stat = RPC_FAILED;
 107         }
 108         addr->sin_port = 0;
 109         return (stat);
 110 }
 111
 112
 113 /*
 114  * XDR remote call arguments
 115  * written for XDR_ENCODE direction only
 116  */
 117 bool_t
 118 xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
 119 {
 120         u_int lenposition, argposition, position;
 121
 122         assert(xdrs != NULL);
 123         assert(cap != NULL);
 124
 125         if (xdr_u_long(xdrs, &(cap->prog)) &&
 126             xdr_u_long(xdrs, &(cap->vers)) &&
 127             xdr_u_long(xdrs, &(cap->proc))) {
 128                 lenposition = XDR_GETPOS(xdrs);
 129                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 130                     return (FALSE);
 131                 argposition = XDR_GETPOS(xdrs);
 132                 if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
 133                     return (FALSE);
 134                 position = XDR_GETPOS(xdrs);
 135                 cap->arglen = (u_long)position - (u_long)argposition;
 136                 XDR_SETPOS(xdrs, lenposition);
 137                 if (! xdr_u_long(xdrs, &(cap->arglen)))
 138                     return (FALSE);
 139                 XDR_SETPOS(xdrs, position);
 140                 return (TRUE);
 141         }
 142         return (FALSE);
 143 }
 144
 145 /*
 146  * XDR remote call results
 147  * written for XDR_DECODE direction only
 148  */
 149 bool_t
 150 xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
 151 {
 152         caddr_t port_ptr;
 153
 154         assert(xdrs != NULL);
 155         assert(crp != NULL);
 156
 157         port_ptr = (caddr_t)(void *)crp->port_ptr;
 158         if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
 159             (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
 160                 crp->port_ptr = (u_long *)(void *)port_ptr;
 161                 return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
 162         }
 163         return (FALSE);
 164 }