source: rtems/cpukit/librpc/src/rpc/svc_simple.c @ 5220ae2

/*
 * 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 (rtems_rpc_task_variables->svc_simple_proglst)
#define pl (rtems_rpc_task_variables->svc_simple_pl)
#define transp (rtems_rpc_task_variables->svc_simple_transp)

int
registerrpc(
        int prognum,
        int versnum,
        int procnum,
        char *(*progname)(),
        xdrproc_t inproc,
        xdrproc_t 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(
        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);
}