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 <libintl.h>
  44 #include <rpc/rpc.h>
  45 #include <rpc/pmap_clnt.h>
  46 #include <sys/socket.h>
  47 #include <netdb.h>
  48
  49 #ifdef USE_IN_LIBIO
  50 # include <libio/iolibio.h>
  51 # define fputs(s, f) _IO_fputs (s, f)
  52 #endif
  53
  54 static struct proglst
  55   {
  56     char *(*p_progname) (char *);
  57     int p_prognum;
  58     int p_procnum;
  59     xdrproc_t p_inproc, p_outproc;
  60     struct proglst *p_nxt;
  61   }
  62  *proglst;
  63
  64 static void universal (struct svc_req *rqstp, SVCXPRT *transp);
  65 static SVCXPRT *transp;
  66
  67 int
  68 registerrpc (u_long prognum, u_long versnum, u_long procnum,
  69              char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc)
  70 {
  71   struct proglst *pl;
  72
  73   if (procnum == NULLPROC)
  74     {
  75       (void) fprintf (stderr,
  76                       _("can't reassign procedure number %ld\n"), NULLPROC);
  77       return -1;
  78     }
  79   if (transp == 0)
  80     {
  81       transp = svcudp_create (RPC_ANYSOCK);
  82       if (transp == NULL)
  83         {
  84           (void) fputs (_("couldn't create an rpc server\n"), stderr);
  85           return -1;
  86         }
  87     }
  88   (void) pmap_unset ((u_long) prognum, (u_long) versnum);
  89   if (!svc_register (transp, (u_long) prognum, (u_long) versnum,
  90                      universal, IPPROTO_UDP))
  91     {
  92       (void) fprintf (stderr, _("couldn't register prog %ld vers %ld\n"),
  93                       prognum, versnum);
  94       return -1;
  95     }
  96   pl = (struct proglst *) malloc (sizeof (struct proglst));
  97   if (pl == NULL)
  98     {
  99       (void) fprintf (stderr, _("registerrpc: out of memory\n"));
 100       return -1;
 101     }
 102   pl->p_progname = progname;
 103   pl->p_prognum = prognum;
 104   pl->p_procnum = procnum;
 105   pl->p_inproc = inproc;
 106   pl->p_outproc = outproc;
 107   pl->p_nxt = proglst;
 108   proglst = pl;
 109   return 0;
 110 }
 111
 112 static void
 113 universal (struct svc_req *rqstp, SVCXPRT *transp)
 114 {
 115   int prog, proc;
 116   char *outdata;
 117   char xdrbuf[UDPMSGSIZE];
 118   struct proglst *pl;
 119
 120   /*
 121    * enforce "procnum 0 is echo" convention
 122    */
 123   if (rqstp->rq_proc == NULLPROC)
 124     {
 125       if (svc_sendreply (transp, (xdrproc_t)xdr_void, (char *) NULL) == FALSE)
 126         {
 127           (void) fprintf (stderr, "xxx\n");
 128           exit (1);
 129         }
 130       return;
 131     }
 132   prog = rqstp->rq_prog;
 133   proc = rqstp->rq_proc;
 134   for (pl = proglst; pl != NULL; pl = pl->p_nxt)
 135     if (pl->p_prognum == prog && pl->p_procnum == proc)
 136       {
 137         /* decode arguments into a CLEAN buffer */
 138         __bzero (xdrbuf, sizeof (xdrbuf));      /* required ! */
 139         if (!svc_getargs (transp, pl->p_inproc, xdrbuf))
 140           {
 141             svcerr_decode (transp);
 142             return;
 143           }
 144         outdata = (*(pl->p_progname)) (xdrbuf);
 145         if (outdata == NULL && pl->p_outproc != (xdrproc_t)xdr_void)
 146           /* there was an error */
 147           return;
 148         if (!svc_sendreply (transp, pl->p_outproc, outdata))
 149           {
 150             (void) fprintf (stderr,
 151                             _ ("trouble replying to prog %d\n"),
 152                             pl->p_prognum);
 153             exit (1);
 154           }
 155         /* free the decoded arguments */
 156         (void) svc_freeargs (transp, pl->p_inproc, xdrbuf);
 157         return;
 158       }
 159   (void) fprintf (stderr, _ ("never registered prog %d\n"), prog);
 160   exit (1);
 161 }