/*      $NetBSD: ypset.c,v 1.17 2011/08/27 22:41:35 joerg Exp $ */

/*
* Copyright (c) 1992, 1993 Theo de Raadt <[email protected]>
* 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: ypset.c,v 1.17 2011/08/27 22:41:35 joerg Exp $");
#endif

#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <netdb.h>

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

__dead static void usage(void);
static void gethostaddr(const char *, struct in_addr *);
static int bind_tohost(struct sockaddr_in *, char *, char *);

int
main(int argc, char *argv[])
{
       struct sockaddr_in sin;
       char *domainname;
       int c;

       yp_get_default_domain(&domainname);

       (void) memset(&sin, 0, sizeof sin);
       sin.sin_family = AF_INET;
       sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

       while ((c = getopt(argc, argv, "h:d:")) != -1) {
               switch(c) {
               case 'd':
                       domainname = optarg;
                       break;

               case 'h':
                       gethostaddr(optarg, &sin.sin_addr);
                       break;

               default:
                       usage();
               }
       }

       if (domainname == NULL)
               errx(1, "YP domain name not set");

       argc -= optind;
       argv += optind;

       if (argc != 1)
               usage();

       return bind_tohost(&sin, domainname, argv[0]) != 0;
}

static void
gethostaddr(const char *host, struct in_addr *ia)
{
       struct hostent *hp;

       if (inet_aton(host, ia) != 0)
               return;

       hp = gethostbyname(host);
       if (hp == NULL)
               errx(1, "Cannot get host address for %s: %s", host,
                   hstrerror(h_errno));
       (void) memcpy(ia, hp->h_addr, sizeof(*ia));
}

static int
bind_tohost(struct sockaddr_in *sin, char *dom, char *server)
{
       struct ypbind_setdom ypsd;
       struct timeval tv;
       CLIENT *client;
       int sock, port;
       int r;

       port = htons(getrpcport(server, YPPROG, YPPROC_NULL, IPPROTO_UDP));
       if (port == 0)
               errx(1, "%s not running ypserv.", server);

       (void) memset(&ypsd, 0, sizeof ypsd);

       gethostaddr(server, &ypsd.ypsetdom_addr);

       (void) strlcpy(ypsd.ypsetdom_domain, dom, sizeof ypsd.ypsetdom_domain);
       ypsd.ypsetdom_port = port;
       ypsd.ypsetdom_vers = YPVERS;

       tv.tv_sec = 15;
       tv.tv_usec = 0;
       sock = RPC_ANYSOCK;

       client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
       if (client == NULL) {
               warnx("Can't yp_bind: Reason: %s", yperr_string(YPERR_YPBIND));
               return YPERR_YPBIND;
       }
       client->cl_auth = authunix_create_default();

       r = clnt_call(client, YPBINDPROC_SETDOM,
           xdr_ypbind_setdom, &ypsd, xdr_void, NULL, tv);
       if (r) {
               warnx("Cannot ypset for domain %s on host %s: %s.",
                   dom, server, clnt_sperrno(r));
               clnt_destroy(client);
               return YPERR_YPBIND;
       }
       clnt_destroy(client);
       return 0;
}

static void
usage(void)
{
       (void) fprintf(stderr, "usage: %s [-h host ] [-d domain] server\n",
           getprogname());
       exit(1);
}