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