lib/libc/rpc/svc_simple.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro
  30  * @(#)svc_simple.c     2.2 88/08/01 4.0 RPCSRC
  31  * $FreeBSD: src/lib/libc/rpc/svc_simple.c,v 1.9 1999/08/28 00:00:50 peter Exp $
  32  * $DragonFly: src/lib/libc/rpc/svc_simple.c,v 1.3 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * svc_simple.c
  37  * Simplified front end to rpc.
  38  *
  39  * Copyright (C) 1984, Sun Microsystems, Inc.
  40  */
  41
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <rpc/rpc.h>
  46 #include <rpc/pmap_clnt.h>
  47 #include <sys/socket.h>
  48 #include <netdb.h>
  49
  50 static struct proglst {
  51         char *(*p_progname)();
  52         int  p_prognum;
  53         int  p_procnum;
  54         xdrproc_t p_inproc, p_outproc;
  55         struct proglst *p_nxt;
  56 } *proglst;
  57 static void universal();
  58 static SVCXPRT *transp;
  59 struct proglst *pl;
  60
  61 int
  62 registerrpc(int prognum, int versnum, int procnum, char *(*progname)(),
  63             xdrproc_t inproc, xdrproc_t outproc)
  64 {
  65
  66         if (procnum == NULLPROC) {
  67                 fprintf(stderr,
  68                     "can't reassign procedure number %ld\n", NULLPROC);
  69                 return (-1);
  70         }
  71         if (transp == 0) {
  72                 transp = svcudp_create(RPC_ANYSOCK);
  73                 if (transp == NULL) {
  74                         fprintf(stderr, "couldn't create an rpc server\n");
  75                         return (-1);
  76                 }
  77         }
  78         pmap_unset((u_long)prognum, (u_long)versnum);
  79         if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
  80             universal, IPPROTO_UDP)) {
  81                 fprintf(stderr, "couldn't register prog %d vers %d\n",
  82                     prognum, versnum);
  83                 return (-1);
  84         }
  85         pl = (struct proglst *)malloc(sizeof(struct proglst));
  86         if (pl == NULL) {
  87                 fprintf(stderr, "registerrpc: out of memory\n");
  88                 return (-1);
  89         }
  90         pl->p_progname = progname;
  91         pl->p_prognum = prognum;
  92         pl->p_procnum = procnum;
  93         pl->p_inproc = inproc;
  94         pl->p_outproc = outproc;
  95         pl->p_nxt = proglst;
  96         proglst = pl;
  97         return (0);
  98 }
  99
 100 static void
 101 universal(struct svc_req *rqstp, SVCXPRT *transp)
 102 {
 103         int prog, proc;
 104         char *outdata;
 105         char xdrbuf[UDPMSGSIZE];
 106         struct proglst *pl;
 107
 108         /*
 109          * enforce "procnum 0 is echo" convention
 110          */
 111         if (rqstp->rq_proc == NULLPROC) {
 112                 if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
 113                         fprintf(stderr, "xxx\n");
 114                         exit(1);
 115                 }
 116                 return;
 117         }
 118         prog = rqstp->rq_prog;
 119         proc = rqstp->rq_proc;
 120         for (pl = proglst; pl != NULL; pl = pl->p_nxt)
 121                 if (pl->p_prognum == prog && pl->p_procnum == proc) {
 122                         /* decode arguments into a CLEAN buffer */
 123                         memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
 124                         if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
 125                                 svcerr_decode(transp);
 126                                 return;
 127                         }
 128                         outdata = (*(pl->p_progname))(xdrbuf);
 129                         if (outdata == NULL && pl->p_outproc != xdr_void)
 130                                 /* there was an error */
 131                                 return;
 132                         if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
 133                                 fprintf(stderr,
 134                                     "trouble replying to prog %d\n",
 135                                     pl->p_prognum);
 136                                 exit(1);
 137                         }
 138                         /* free the decoded arguments */
 139                         svc_freeargs(transp, pl->p_inproc, xdrbuf);
 140                         return;
 141                 }
 142         fprintf(stderr, "never registered prog %d\n", prog);
 143         exit(1);
 144 }
 145