/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 1995, 1996
 *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <rpcsvc/ypxfrd.h>
#include <rpcsvc/yp.h>
#include <rpc/rpc.h>
#include <sys/uio.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "ypxfr_extern.h"

static int fp = 0;

static bool_t
xdr_my_xfr(register XDR *xdrs, xfr *objp)
{
        while (1) {
                if (!xdr_xfr(xdrs, objp))
                        return(FALSE);
                if (objp->ok == TRUE) {
                        if (write(fp, objp->xfr_u.xfrblock_buf.xfrblock_buf_val,
                            objp->xfr_u.xfrblock_buf.xfrblock_buf_len) == -1) {
                                yp_error("write failed: %s", strerror(errno));
                                return(FALSE);
                        }
                }
                xdr_free((xdrproc_t)xdr_xfr, (char *)objp);
                if (objp->ok == FALSE) {
                        switch (objp->xfr_u.xfrstat) {
                        case(XFR_DONE):
                                return(TRUE);
                                break;
                        case(XFR_READ_ERR):
                                yp_error("got read error from rpc.ypxfrd");
                                return(FALSE);
                                break;
                        case(XFR_ACCESS):
                                yp_error("rpc.ypxfrd couldn't access the map");
                                return(FALSE);
                                break;
                        case(XFR_DENIED):
                                yp_error("access to map denied by rpc.ypxfrd");
                                return(FALSE);
                                break;
                        case(XFR_DB_TYPE_MISMATCH):
                                yp_error("client/server DB type mismatch");
                                return(FALSE);
                                break;
                        case(XFR_DB_ENDIAN_MISMATCH):
                                yp_error("client/server byte order mismatch");
                                return(FALSE);
                                break;
                        default:
                                yp_error("got unknown status from rpc.ypxfrd");
                                return(FALSE);
                                break;
                        }
                }
        }
}

#define PERM_SECURE (S_IRUSR|S_IWUSR)

int
ypxfrd_get_map(char *host, char *map, char *domain, char *tmpname)
{
        CLIENT *clnt;
        struct ypxfr_mapname req;
        struct xfr resp;
        struct timeval timeout = { 0, 25 };
        int status = 0;

        req.xfrmap = map;
        req.xfrdomain = domain;
        req.xfrmap_filename = "";
        req.xfr_db_type = XFR_DB_BSD_HASH;      /*
        req.xfr_byte_order = XFR_ENDIAN_ANY;     * Berkeley DB isn't
                                                 * byte-order sensitive.
                                                 */

        bzero((char *)&resp, sizeof(resp));

        if ((clnt = clnt_create(host, YPXFRD_FREEBSD_PROG,
                                YPXFRD_FREEBSD_VERS, "tcp")) == NULL) {
                return(1);
        }

        if ((fp = open(tmpname, O_RDWR|O_CREAT, PERM_SECURE)) == -1) {
                clnt_destroy(clnt);
                yp_error("couldn't open %s: %s", tmpname, strerror(errno));
                return(1);
        }

        if (clnt_call(clnt,YPXFRD_GETMAP,
                        (xdrproc_t)xdr_ypxfr_mapname, (char *)&req,
                        (xdrproc_t)xdr_my_xfr, (char *)&resp,
                        timeout) != RPC_SUCCESS) {
                yp_error("%s", clnt_sperror(clnt,"call to rpc.ypxfrd failed"));
                status++;
                unlink(tmpname);
        }

        clnt_destroy(clnt);
        close(fp);
        return(status);
}