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