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/*

 * 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

 */

#if defined(LIBC_SCCS) && !defined(lint)

/*static char *sccsid = "from: @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";*/

/*static char *sccsid = "from: @(#)svc_simple.c 2.2 88/08/01 4.0 RPCSRC";*/

static char *rcsid = "$FreeBSD: src/lib/libc/rpc/svc_simple.c,v 1.9 1999/08/28 00:00:50 peter Exp $";

#endif

/*

 * svc_simple.c

 * Simplified front end to rpc.

 *

 * Copyright (C) 1984, Sun Microsystems, Inc.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <rpc/rpc.h>

#include <rpc/pmap_clnt.h>

#include <sys/socket.h>

#include <netdb.h>

struct prog_lst {

        char *(*p_progname)();

        int  p_prognum;

        int  p_procnum;

        xdrproc_t p_inproc, p_outproc;

        struct prog_lst *p_nxt;

};

static void universal();

#define proglst ((struct prog_lst *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->svc_simple_proglst)

#define pl ((struct prog_lst *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->svc_simple_pl)

#define transp ((SVCXPRT *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->svc_simple_transp)

int

registerrpc(prognum, versnum, procnum, progname, inproc, outproc)

        int prognum, versnum, procnum;

        char *(*progname)();

        xdrproc_t inproc, outproc;

{

        if (procnum == NULLPROC) {

                (void) fprintf(stderr,

                    "can't reassign procedure number %ld\n", NULLPROC);

                return (-1);

        }

        if (transp == 0) {

                transp = svcudp_create(RPC_ANYSOCK);

                if (transp == NULL) {

                        (void) fprintf(stderr, "couldn't create an rpc server\n");

                        return (-1);

                }

        }

        (void) pmap_unset((u_long)prognum, (u_long)versnum);

        if (!svc_register(transp, (u_long)prognum, (u_long)versnum,

            universal, IPPROTO_UDP)) {

                (void) fprintf(stderr, "couldn't register prog %d vers %d\n",

                    prognum, versnum);

                return (-1);

        }

        pl = (struct prog_lst *)malloc(sizeof(struct prog_lst));

        if (pl == NULL) {

                (void) 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 void

universal(rqstp, atransp)

        struct svc_req *rqstp;

        SVCXPRT *atransp;

{

        int prog, proc;

        char *outdata;

        char xdrbuf[UDPMSGSIZE];

        struct prog_lst *lpl;

        /*

         * enforce "procnum 0 is echo" convention

         */

        if (rqstp->rq_proc == NULLPROC) {

                if (svc_sendreply(atransp, xdr_void, NULL) == FALSE) {

                        (void) fprintf(stderr, "xxx\n");

                        exit(1);

                }

                return;

        }

        prog = rqstp->rq_prog;

        proc = rqstp->rq_proc;

        for (lpl = proglst; lpl != NULL; lpl = lpl->p_nxt)

                if (lpl->p_prognum == prog && lpl->p_procnum == proc) {

                        /* decode arguments into a CLEAN buffer */

                        memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */

                        if (!svc_getargs(atransp, lpl->p_inproc, xdrbuf)) {

                                svcerr_decode(atransp);

                                return;

                        }

                        outdata = (*(lpl->p_progname))(xdrbuf);

                        if (outdata == NULL && lpl->p_outproc != xdr_void)

                                /* there was an error */

                                return;

                        if (!svc_sendreply(atransp, lpl->p_outproc, outdata)) {

                                (void) fprintf(stderr,

                                    "trouble replying to prog %d\n",

                                    lpl->p_prognum);

                                exit(1);

                        }

                        /* free the decoded arguments */

                        (void)svc_freeargs(atransp, lpl->p_inproc, xdrbuf);

                        return;

                }

        (void) fprintf(stderr, "never registered prog %d\n", prog);

        exit(1);

}