BSD 4_3 release

[unix-history] / usr / contrib / sunrpc / svc_simple.c

/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part.  Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
* 
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
* 
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
* 
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
* 
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
* 
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California  94043
*/
#ifndef lint
static char sccsid[] = "@(#)svc_simple.c 1.3 85/03/14 Copyr 1984 Sun Micro";
#endif

/* 
* svc_simple.c
* Simplified front end to rpc.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/

#include <stdio.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netdb.h>

static struct proglst {
       char *(*p_progname)();
       int  p_prognum;
       int  p_procnum;
       xdrproc_t p_inproc, p_outproc;
       struct proglst *p_nxt;
} *proglst;
int universal();

registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
       char *(*progname)();
       xdrproc_t inproc, outproc;
{
       static SVCXPRT *transp;
       static madetransp = 0;
       struct proglst *pl;
       
       if (procnum == NULLPROC) {
               fprintf(stderr,
                   "can't reassign procedure number %d\n", NULLPROC);
               return (-1);
       }
       if (!madetransp) {
               madetransp = 1;
               transp = svcudp_create(RPC_ANYSOCK);
               if (transp == NULL) {
                       fprintf(stderr, "couldn't create an rpc server\n");
                       return (-1);
               }
       }
       pmap_unset(prognum, versnum);
       if (!svc_register(transp, prognum, versnum, universal, IPPROTO_UDP)) {
               fprintf(stderr, "couldn't register prog %d vers %d\n",
                   prognum, versnum);
               return (-1);
       }
       pl = (struct proglst *)malloc(sizeof(struct proglst));
       if (pl == NULL) {
               fprintf(stderr, "registerrpc: out of memory\n");
               return (-1);
       }
       pl->p_progname = progname;
       pl->p_prognum = prognum;
       pl->p_procnum = procnum;
       pl->p_inproc = inproc;
       pl->p_outproc = outproc;
       pl->p_nxt = proglst;
       proglst = pl;
       return (0);
}

static
universal(rqstp, transp)
       struct svc_req *rqstp;
       SVCXPRT *transp;
{
       int prog, proc, i;
       char *outdata;
       char xdrbuf[UDPMSGSIZE];
       struct proglst *pl;

       /* 
        * enforce "procnum 0 is echo" convention
        */
       if (rqstp->rq_proc == NULLPROC) {
               if (svc_sendreply(transp, xdr_void, 0) == FALSE) {
                       fprintf(stderr, "xxx\n");
                       exit(1);
               }
               return;
       }
       prog = rqstp->rq_prog;
       proc = rqstp->rq_proc;
       for (pl = proglst; pl != NULL; pl = pl->p_nxt)
               if (pl->p_prognum == prog && pl->p_procnum == proc) {
                       /* decode arguments into a CLEAN buffer */
                       bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
                       if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
                               svcerr_decode(transp);
                               return;
                       }
                       outdata = (*(pl->p_progname))(xdrbuf);
                       if (outdata == NULL && pl->p_outproc != xdr_void)
                               /* there was an error */
                               return;
                       if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
                               fprintf(stderr,
                                   "trouble replying to prog %d\n",
                                   pl->p_prognum);
                               exit(1);
                       /* free the decoded arguments */
                       (void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
                       }
                       return;
               }
       fprintf(stderr, "never registered prog %d\n", prog);
       exit(1);
}