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/*-

 * Copyright (c) 1994, Garrett Wollman

 *

 * 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 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 THE REGENTS 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.

 */

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

static char sccsid[] = "@(#)$Id: gethostbynis.c,v 1.2 2001-09-27 12:01:53 chris Exp $";

static char rcsid[] = "$Id: gethostbynis.c,v 1.2 2001-09-27 12:01:53 chris Exp $";

#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <netdb.h>

#include <stdio.h>

#include <stdlib.h>

#include <ctype.h>

#include <errno.h>

#include <string.h>

#ifdef YP

#include <rpc/rpc.h>

#include <rpcsvc/yp_prot.h>

#include <rpcsvc/ypclnt.h>

#endif

#define MAXALIASES      35

#define MAXADDRS        35

#ifdef YP

static char *host_aliases[MAXALIASES];

static char hostaddr[MAXADDRS];

static char *host_addrs[2];

#endif /* YP */

static struct hostent *

_gethostbynis(name, map, af)

        const char *name;

        char *map;

        int af;

{

#ifdef YP

        register char *cp, **q;

        char *result;

        int resultlen;

        static struct hostent h;

        static char *domain = (char *)NULL;

        static char ypbuf[YPMAXRECORD + 2];

        switch(af) {

        case AF_INET:

                break;

        default:

        case AF_INET6:

                errno = EAFNOSUPPORT;

                return NULL;

        }

        if (domain == (char *)NULL)

                if (yp_get_default_domain (&domain))

                        return ((struct hostent *)NULL);

        if (yp_match(domain, map, name, strlen(name), &result, &resultlen))

                return ((struct hostent *)NULL);

        /* avoid potential memory leak */

        bcopy((char *)result, (char *)&ypbuf, resultlen);

        ypbuf[resultlen] = '\0';

        free(result);

        result = (char *)&ypbuf;

        if ((cp = index(result, '\n')))

                *cp = '\0';

        cp = strpbrk(result, " \t");

        *cp++ = '\0';

        h.h_addr_list = host_addrs;

        h.h_addr = hostaddr;

        *((u_long *)h.h_addr) = inet_addr(result);

        h.h_length = sizeof(u_long);

        h.h_addrtype = AF_INET;

        while (*cp == ' ' || *cp == '\t')

                cp++;

        h.h_name = cp;

        q = h.h_aliases = host_aliases;

        cp = strpbrk(cp, " \t");

        if (cp != NULL)

                *cp++ = '\0';

        while (cp && *cp) {

                if (*cp == ' ' || *cp == '\t') {

                        cp++;

                        continue;

                }

                if (q < &host_aliases[MAXALIASES - 1])

                        *q++ = cp;

                cp = strpbrk(cp, " \t");

                if (cp != NULL)

                        *cp++ = '\0';

        }

        *q = NULL;

        return (&h);

#else

        return (NULL);

#endif /* YP */

}

struct hostent *

_gethostbynisname(name, af)

        const char *name;

        int af;

{

        return _gethostbynis(name, "hosts.byname", af);

}

struct hostent *

_gethostbynisaddr(addr, len, af)

        const char *addr;

        int len;

        int af;

{

        return _gethostbynis(inet_ntoa(*(struct in_addr *)addr),"hosts.byaddr", af);

}