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 0
  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 #define __FORCE_GLIBC
  42 #include <features.h>
  43
  44 #include <stdio.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47 #include "rpc_private.h"
  48 #include <rpc/pmap_clnt.h>
  49 #include <sys/socket.h>
  50 #include <netdb.h>
  51
  52 #ifdef USE_IN_LIBIO
  53 # include <wchar.h>
  54 # include <libio/iolibio.h>
  55 # define fputs(s, f) _IO_fputs (s, f)
  56 #endif
  57
  58
  59 struct proglst_
  60   {
  61     char *(*p_progname) (char *);
  62     int p_prognum;
  63     int p_procnum;
  64     xdrproc_t p_inproc, p_outproc;
  65     struct proglst_ *p_nxt;
  66   };
  67 #ifdef __UCLIBC_HAS_THREADS__
  68 #define proglst (*(struct proglst_ **)&RPC_THREAD_VARIABLE(svcsimple_proglst_s))
  69 #else
  70 static struct proglst_ *proglst;
  71 #endif
  72
  73
  74 static void universal (struct svc_req *rqstp, SVCXPRT *transp_s);
  75 #ifdef __UCLIBC_HAS_THREADS__
  76 #define transp (*(SVCXPRT **)&RPC_THREAD_VARIABLE(svcsimple_transp_s))
  77 #else
  78 static SVCXPRT *transp;
  79 #endif
  80
  81 int registerrpc (u_long prognum, u_long versnum, u_long procnum,
  82              char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc);
  83 int
  84 registerrpc (u_long prognum, u_long versnum, u_long procnum,
  85              char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc)
  86 {
  87   struct proglst_ *pl;
  88   char *buf;
  89
  90   if (procnum == NULLPROC)
  91     {
  92
  93       (void) asprintf (&buf, _("can't reassign procedure number %ld\n"),
  94                          NULLPROC);
  95       goto err_out;
  96     }
  97   if (transp == 0)
  98     {
  99       transp = svcudp_create (RPC_ANYSOCK);
 100       if (transp == NULL)
 101         {
 102           buf = strdup (_("couldn't create an rpc server\n"));
 103           goto err_out;
 104         }
 105     }
 106   (void) pmap_unset ((u_long) prognum, (u_long) versnum);
 107   if (!svc_register (transp, (u_long) prognum, (u_long) versnum,
 108                      universal, IPPROTO_UDP))
 109     {
 110       (void) asprintf (&buf, _("couldn't register prog %ld vers %ld\n"),
 111                          prognum, versnum);
 112       goto err_out;
 113     }
 114   pl = (struct proglst_ *) malloc (sizeof (struct proglst_));
 115   if (pl == NULL)
 116     {
 117       buf = strdup (_("registerrpc: out of memory\n"));
 118       goto err_out;
 119     }
 120   pl->p_progname = progname;
 121   pl->p_prognum = prognum;
 122   pl->p_procnum = procnum;
 123   pl->p_inproc = inproc;
 124   pl->p_outproc = outproc;
 125   pl->p_nxt = proglst;
 126   proglst = pl;
 127   return 0;
 128
 129  err_out:
 130 #ifdef USE_IN_LIBIO
 131   if (_IO_fwide (stderr, 0) > 0)
 132     (void) __fwprintf (stderr, L"%s", buf);
 133   else
 134 #endif
 135     (void) fputs (buf, stderr);
 136   free (buf);
 137   return -1;
 138 }
 139
 140 static void
 141 universal (struct svc_req *rqstp, SVCXPRT *transp_l)
 142 {
 143   int prog, proc;
 144   char *outdata;
 145   char xdrbuf[UDPMSGSIZE];
 146   struct proglst_ *pl;
 147   char *buf = NULL;
 148
 149   /*
 150    * enforce "procnum 0 is echo" convention
 151    */
 152   if (rqstp->rq_proc == NULLPROC)
 153     {
 154       if (svc_sendreply (transp_l, (xdrproc_t)xdr_void, (char *) NULL) == FALSE)
 155         {
 156           write (STDERR_FILENO, "xxx\n", 4);
 157           exit (1);
 158         }
 159       return;
 160     }
 161   prog = rqstp->rq_prog;
 162   proc = rqstp->rq_proc;
 163   for (pl = proglst; pl != NULL; pl = pl->p_nxt)
 164     if (pl->p_prognum == prog && pl->p_procnum == proc)
 165       {
 166         /* decode arguments into a CLEAN buffer */
 167         memset (xdrbuf, 0, sizeof (xdrbuf));    /* required ! */
 168         if (!svc_getargs (transp_l, pl->p_inproc, xdrbuf))
 169           {
 170             svcerr_decode (transp_l);
 171             return;
 172           }
 173         outdata = (*(pl->p_progname)) (xdrbuf);
 174         if (outdata == NULL && pl->p_outproc != (xdrproc_t)xdr_void)
 175           /* there was an error */
 176           return;
 177         if (!svc_sendreply (transp_l, pl->p_outproc, outdata))
 178           {
 179             (void) asprintf (&buf,
 180                                _("trouble replying to prog %d\n"),
 181                                pl->p_prognum);
 182             exit (1);
 183           }
 184         /* free the decoded arguments */
 185         (void) svc_freeargs (transp_l, pl->p_inproc, xdrbuf);
 186         return;
 187       }
 188   (void) asprintf (&buf, _("never registered prog %d\n"), prog);
 189 #ifdef USE_IN_LIBIO
 190   if (_IO_fwide (stderr, 0) > 0)
 191     __fwprintf (stderr, L"%s", buf);
 192   else
 193 #endif
 194     fputs (buf, stderr);
 195   free (buf);
 196   exit (1);
 197 }