sunrpc/svc_simple.c

   1 /* @(#)svc_simple.c     2.2 88/08/01 4.0 RPCSRC */
   2 /*
   3  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   4  * unrestricted use provided that this legend is included on all tape
   5  * media and as a part of the software program in whole or part.  Users
   6  * may copy or modify Sun RPC without charge, but are not authorized
   7  * to license or distribute it to anyone else except as part of a product or
   8  * program developed by the user.
   9  *
  10  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  11  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  12  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  13  *
  14  * Sun RPC is provided with no support and without any obligation on the
  15  * part of Sun Microsystems, Inc. to assist in its use, correction,
  16  * modification or enhancement.
  17  *
  18  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  19  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  20  * OR ANY PART THEREOF.
  21  *
  22  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  23  * or profits or other special, indirect and consequential damages, even if
  24  * Sun has been advised of the possibility of such damages.
  25  *
  26  * Sun Microsystems, Inc.
  27  * 2550 Garcia Avenue
  28  * Mountain View, California  94043
  29  */
  30 #if !defined(lint) && defined(SCCSIDS)
  31 static char sccsid[] = "@(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";
  32 #endif
  33
  34 /*
  35  * svc_simple.c
  36  * Simplified front end to rpc.
  37  *
  38  * Copyright (C) 1984, Sun Microsystems, Inc.
  39  */
  40
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <rpc/rpc.h>
  44 #include <rpc/pmap_clnt.h>
  45 #include <sys/socket.h>
  46 #include <netdb.h>
  47
  48 #ifdef USE_IN_LIBIO
  49 # include <libio/iolibio.h>
  50 # define fputs(s, f) _IO_fputs (s, f)
  51 #endif
  52
  53 static struct proglst
  54   {
  55     char *(*p_progname) (char *);
  56     int p_prognum;
  57     int p_procnum;
  58     xdrproc_t p_inproc, p_outproc;
  59     struct proglst *p_nxt;
  60   }
  61  *proglst;
  62
  63 static void universal (struct svc_req *rqstp, SVCXPRT *transp);
  64 static SVCXPRT *transp;
  65
  66 int
  67 registerrpc (u_long prognum, u_long versnum, u_long procnum,
  68              char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc)
  69 {
  70   struct proglst *pl;
  71
  72   if (procnum == NULLPROC)
  73     {
  74       (void) fprintf (stderr,
  75                       _("can't reassign procedure number %d\n"), NULLPROC);
  76       return -1;
  77     }
  78   if (transp == 0)
  79     {
  80       transp = svcudp_create (RPC_ANYSOCK);
  81       if (transp == NULL)
  82         {
  83           (void) fputs (_("couldn't create an rpc server\n"), stderr);
  84           return -1;
  85         }
  86     }
  87   (void) pmap_unset ((u_long) prognum, (u_long) versnum);
  88   if (!svc_register (transp, (u_long) prognum, (u_long) versnum,
  89                      universal, IPPROTO_UDP))
  90     {
  91       (void) fprintf (stderr, _("couldn't register prog %d vers %d\n"),
  92                       prognum, versnum);
  93       return -1;
  94     }
  95   pl = (struct proglst *) malloc (sizeof (struct proglst));
  96   if (pl == NULL)
  97     {
  98       (void) fprintf (stderr, _("registerrpc: out of memory\n"));
  99       return -1;
 100     }
 101   pl->p_progname = progname;
 102   pl->p_prognum = prognum;
 103   pl->p_procnum = procnum;
 104   pl->p_inproc = inproc;
 105   pl->p_outproc = outproc;
 106   pl->p_nxt = proglst;
 107   proglst = pl;
 108   return 0;
 109 }
 110
 111 static void
 112 universal (struct svc_req *rqstp, SVCXPRT *transp)
 113 {
 114   int prog, proc;
 115   char *outdata;
 116   char xdrbuf[UDPMSGSIZE];
 117   struct proglst *pl;
 118
 119   /*
 120    * enforce "procnum 0 is echo" convention
 121    */
 122   if (rqstp->rq_proc == NULLPROC)
 123     {
 124       if (svc_sendreply (transp, (xdrproc_t)xdr_void, (char *) NULL) == FALSE)
 125         {
 126           (void) fprintf (stderr, "xxx\n");
 127           exit (1);
 128         }
 129       return;
 130     }
 131   prog = rqstp->rq_prog;
 132   proc = rqstp->rq_proc;
 133   for (pl = proglst; pl != NULL; pl = pl->p_nxt)
 134     if (pl->p_prognum == prog && pl->p_procnum == proc)
 135       {
 136         /* decode arguments into a CLEAN buffer */
 137         __bzero (xdrbuf, sizeof (xdrbuf));      /* required ! */
 138         if (!svc_getargs (transp, pl->p_inproc, xdrbuf))
 139           {
 140             svcerr_decode (transp);
 141             return;
 142           }
 143         outdata = (*(pl->p_progname)) (xdrbuf);
 144         if (outdata == NULL && pl->p_outproc != (xdrproc_t)xdr_void)
 145           /* there was an error */
 146           return;
 147         if (!svc_sendreply (transp, pl->p_outproc, outdata))
 148           {
 149             (void) fprintf (stderr,
 150                             _ ("trouble replying to prog %d\n"),
 151                             pl->p_prognum);
 152             exit (1);
 153           }
 154         /* free the decoded arguments */
 155         (void) svc_freeargs (transp, pl->p_inproc, xdrbuf);
 156         return;
 157       }
 158   (void) fprintf (stderr, _ ("never registered prog %d\n"), prog);
 159   exit (1);
 160 }