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/*

 * Copyright (c) 1983, 1993

 *      The Regents of the University of California.  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 the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 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.

 */

/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro

 *      Dep. Matematica Universidade de Coimbra, Portugal, Europe

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * from getnetent.c     1.1 (Coimbra) 93/06/02

 */

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

static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";

static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp";

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

#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <arpa/nameser.h>

#include <netdb.h>

#include <stdio.h>

#include <string.h>

#define MAXALIASES      35

static FILE *netf;

static char line[BUFSIZ+1];

static struct netent net;

static char *net_aliases[MAXALIASES];

static int _net_stayopen;

void

_setnethtent(f)

        int f;

{

        if (netf == NULL)

                netf = fopen(_PATH_NETWORKS, "r" );

        else

                rewind(netf);

        _net_stayopen |= f;

}

void

_endnethtent()

{

        if (netf) {

                fclose(netf);

                netf = NULL;

        }

        _net_stayopen = 0;

}

struct netent *

getnetent()

{

        char *p;

        register char *cp, **q;

        if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)

                return (NULL);

again:

        p = fgets(line, sizeof line, netf);

        if (p == NULL)

                return (NULL);

        if (*p == '#')

                goto again;

        cp = strpbrk(p, "#\n");

        if (cp == NULL)

                goto again;

        *cp = '\0';

        net.n_name = p;

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

        if (cp == NULL)

                goto again;

        *cp++ = '\0';

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

                cp++;

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

        if (p != NULL)

                *p++ = '\0';

        net.n_net = inet_network(cp);

        net.n_addrtype = AF_INET;

        q = net.n_aliases = net_aliases;

        if (p != NULL)

                cp = p;

        while (cp && *cp) {

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

                        cp++;

                        continue;

                }

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

                        *q++ = cp;

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

                if (cp != NULL)

                        *cp++ = '\0';

        }

        *q = NULL;

        return (&net);

}

struct netent *

_getnetbyhtname(name)

        register const char *name;

{

        register struct netent *p;

        register char **cp;

        setnetent(_net_stayopen);

        while ( (p = getnetent()) ) {

                if (strcasecmp(p->n_name, name) == 0)

                        break;

                for (cp = p->n_aliases; *cp != 0; cp++)

                        if (strcasecmp(*cp, name) == 0)

                                goto found;

        }

found:

        if (!_net_stayopen)

                endnetent();

        return (p);

}

struct netent *

_getnetbyhtaddr(net, type)

        register unsigned long net;

        register int type;

{

        register struct netent *p;

        setnetent(_net_stayopen);

        while ( (p = getnetent()) )

                if (p->n_addrtype == type && p->n_net == net)

                        break;

        if (!_net_stayopen)

                endnetent();

        return (p);

}