/*      $NetBSD: yplib_host.c,v 1.9 2011/08/30 17:06:22 plunky Exp $    */

/*
 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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>
#ifndef lint
__RCSID("$NetBSD: yplib_host.c,v 1.9 2011/08/30 17:06:22 plunky Exp $");
#endif

#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/uio.h>

#include <netinet/in.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <unistd.h>

#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>

#include "yplib_host.h"

struct timeval _yplib_host_timeout = { 10, 0 };

CLIENT *
yp_bind_host(char *server, u_int program, u_int version, u_short port,
             int usetcp)
{
        struct sockaddr_in rsrv_sin;
        int rsrv_sock;
        struct hostent *h;
        static CLIENT *client;

        memset(&rsrv_sin, 0, sizeof rsrv_sin);
        rsrv_sin.sin_len = sizeof rsrv_sin;
        rsrv_sin.sin_family = AF_INET;
        rsrv_sock = RPC_ANYSOCK;
        if (port != 0) {
                rsrv_sin.sin_port = htons(port);
        }

        if (isdigit((unsigned char)*server)) {
                if (inet_aton(server,&rsrv_sin.sin_addr) == 0) {
                        errx(1, "invalid IP address `%s'", server);
                }
        } else {
                h = gethostbyname(server);
                if(h == NULL) {
                        errx(1, "unknown host `%s'", server);
                }
                memcpy(&rsrv_sin.sin_addr.s_addr, h->h_addr_list[0],
                    h->h_length);
        }

        if (usetcp)
                client = clnttcp_create(&rsrv_sin, program, version,
                    &rsrv_sock, 0, 0);
        else
                client = clntudp_create(&rsrv_sin, program, version,
                    _yplib_host_timeout, &rsrv_sock);

        if (client == NULL)
                errx(1, "%s: no contact with host `%s'",
                    usetcp ? "clnttcp_create" : "clntudp_create", server);

        return(client);
}

CLIENT *
yp_bind_local(u_int program, u_int version)
{
        struct sockaddr_in rsrv_sin;
        int rsrv_sock;
        static CLIENT *client;

        memset(&rsrv_sin, 0, sizeof rsrv_sin);
        rsrv_sin.sin_len = sizeof rsrv_sin;
        rsrv_sin.sin_family = AF_INET;
        rsrv_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
        rsrv_sock = RPC_ANYSOCK;

        client = clntudp_create(&rsrv_sin, program, version,
            _yplib_host_timeout, &rsrv_sock);
        if (client == NULL)
                errx(1, "clntudp_create: no contact with localhost");

        return(client);
}

int
yp_match_host(CLIENT *client, char *indomain, char *inmap, const char *inkey,
              int inkeylen, char **outval, int *outvallen)
{
        struct ypresp_val yprv;
        struct ypreq_key yprk;
        int r;

        *outval = NULL;
        *outvallen = 0;

        yprk.domain = indomain;
        yprk.map = inmap;
        yprk.keydat.dptr = __UNCONST(inkey);
        yprk.keydat.dsize = inkeylen;

        memset(&yprv, 0, sizeof yprv);

        r = clnt_call(client, YPPROC_MATCH, xdr_ypreq_key, &yprk,
            xdr_ypresp_val, &yprv, _yplib_host_timeout);
        if(r != RPC_SUCCESS)
                clnt_perror(client, "yp_match_host: clnt_call");

        if(!(r=ypprot_err(yprv.status)) ) {
                *outvallen = yprv.valdat.dsize;
                *outval = (char *)malloc(*outvallen+1);
                memcpy(*outval, yprv.valdat.dptr, *outvallen);
                (*outval)[*outvallen] = '\0';
        }
        xdr_free((xdrproc_t)xdr_ypresp_val, (char *)&yprv);
        return r;
}

int
yp_first_host(CLIENT *client, char *indomain, char *inmap, char **outkey,
              int *outkeylen, char **outval, int *outvallen)
{
        struct ypresp_key_val yprkv;
        struct ypreq_nokey yprnk;
        int r;

        *outkey = *outval = NULL;
        *outkeylen = *outvallen = 0;

        yprnk.domain = indomain;
        yprnk.map = inmap;
        memset(&yprkv, 0, sizeof yprkv);

        r = clnt_call(client, YPPROC_FIRST, xdr_ypreq_nokey, &yprnk,
            xdr_ypresp_key_val, &yprkv, _yplib_host_timeout);
        if (r != RPC_SUCCESS)
                clnt_perror(client, "yp_first_host: clnt_call");

        if(!(r=ypprot_err(yprkv.status)) ) {
                *outkeylen = yprkv.keydat.dsize;
                *outkey = (char *)malloc(*outkeylen+1);
                memcpy(*outkey, yprkv.keydat.dptr, *outkeylen);
                (*outkey)[*outkeylen] = '\0';
                *outvallen = yprkv.valdat.dsize;
                *outval = (char *)malloc(*outvallen+1);
                memcpy(*outval, yprkv.valdat.dptr, *outvallen);
                (*outval)[*outvallen] = '\0';
        }
        xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *)&yprkv);
        return r;
}

int
yp_next_host(CLIENT *client, char *indomain, char *inmap, char *inkey,
             int inkeylen, char **outkey, int *outkeylen, char **outval,
             int *outvallen)
{
        struct ypresp_key_val yprkv;
        struct ypreq_key yprk;
        int r;

        *outkey = *outval = NULL;
        *outkeylen = *outvallen = 0;

        yprk.domain = indomain;
        yprk.map = inmap;
        yprk.keydat.dptr = inkey;
        yprk.keydat.dsize = inkeylen;
        memset(&yprkv, 0, sizeof yprkv);

        r = clnt_call(client, YPPROC_NEXT, xdr_ypreq_key, &yprk,
            xdr_ypresp_key_val, &yprkv, _yplib_host_timeout);
        if (r != RPC_SUCCESS)
                clnt_perror(client, "yp_next_host: clnt_call");

        if(!(r=ypprot_err(yprkv.status)) ) {
                *outkeylen = yprkv.keydat.dsize;
                *outkey = (char *)malloc(*outkeylen+1);
                memcpy(*outkey, yprkv.keydat.dptr, *outkeylen);
                (*outkey)[*outkeylen] = '\0';
                *outvallen = yprkv.valdat.dsize;
                *outval = (char *)malloc(*outvallen+1);
                memcpy(*outval, yprkv.valdat.dptr, *outvallen);
                (*outval)[*outvallen] = '\0';
        }
        xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *)&yprkv);
        return r;
}

int
yp_all_host(CLIENT *client, const char *indomain, const char *inmap,
            struct ypall_callback *incallback)
{
        struct ypreq_nokey yprnk;
        int status;

        yprnk.domain = indomain;
        yprnk.map = inmap;

        status = clnt_call(client, YPPROC_ALL, xdr_ypreq_nokey, &yprnk,
            xdr_ypall, (char *)incallback, _yplib_host_timeout);

        if (status != RPC_SUCCESS)
                return YPERR_RPC;

        return 0;
}

int
yp_order_host(CLIENT *client, char *indomain, char *inmap, int *outorder)
{
        struct ypresp_order ypro;
        struct ypreq_nokey yprnk;
        int r;

        yprnk.domain = indomain;
        yprnk.map = inmap;

        memset(&ypro, 0, sizeof ypro);

        r = clnt_call(client, YPPROC_ORDER, xdr_ypreq_nokey, &yprnk,
            xdr_ypresp_order, &ypro, _yplib_host_timeout);
        if (r != RPC_SUCCESS)
                clnt_perror(client, "yp_order_host: clnt_call");

        *outorder = ypro.ordernum;
        xdr_free((xdrproc_t)xdr_ypresp_order, (char *)&ypro);
        return ypprot_err(ypro.status);
}

int
yp_master_host(CLIENT *client, char *indomain, char *inmap, char **outname)
{
        struct ypresp_master yprm;
        struct ypreq_nokey yprnk;
        int r;

        yprnk.domain = indomain;
        yprnk.map = inmap;

        memset(&yprm, 0, sizeof yprm);

        r = clnt_call(client, YPPROC_MASTER, xdr_ypreq_nokey, &yprnk,
            xdr_ypresp_master, &yprm, _yplib_host_timeout);
        if (r != RPC_SUCCESS)
                clnt_perror(client, "yp_master: clnt_call");

        if (!(r = ypprot_err(yprm.status))) {
                *outname = (char *)strdup(yprm.master);
        }
        xdr_free((xdrproc_t)xdr_ypresp_master, (char *)&yprm);
        return r;
}

int
yp_maplist_host(CLIENT *client, char *indomain, struct ypmaplist **outmaplist)
{
        struct ypresp_maplist ypml;
        int r;

        memset(&ypml, 0, sizeof ypml);

        r = clnt_call(client, YPPROC_MAPLIST, xdr_ypdomain_wrap_string,
            indomain, xdr_ypresp_maplist, &ypml, _yplib_host_timeout);
        if (r != RPC_SUCCESS)
                clnt_perror(client, "yp_maplist: clnt_call");

        *outmaplist = ypml.list;
        /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
        return ypprot_err(ypml.status);
}