/*
 * Copyright (c) 1983 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getservent.c        5.9 (Berkeley) 2/24/91";
#endif /* LIBC_SCCS and not lint */

#define KERNEL
#include "ixnet.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAXALIASES      35

static FILE *servf = NULL;
static struct servent serv;
static char *serv_aliases[MAXALIASES];
int _serv_stayopen = 0;

void
setservent(int f) {
    register struct ixnet *p = (struct ixnet *)u.u_ixnet;
    register int network_protocol = p->u_networkprotocol;

    if (network_protocol == IX_NETWORK_AS225) {
        SOCK_setservent(p->u_SockBase,f);
    }
    else /* if (network_protocol == IX_NETWORK_AMITCP) */ {
        if (servf == NULL) {
            servf = fopen(_TCP_PATH_SERVICES, "r" );
            if (!servf)
                return;
        }
        else
            rewind(servf);
        _serv_stayopen |= f;
    }
}

void
endservent(void) {
    register struct ixnet *p = (struct ixnet *)u.u_ixnet;
    if (p->u_networkprotocol == IX_NETWORK_AS225) {
        SOCK_endservent(p->u_SockBase);
    }
    else {
        if (servf) {
            fclose(servf);
            servf = NULL;
        }
        _serv_stayopen = 0;
    }
}

struct servent *
getservent(void) {
        char *p;
        static char line[BUFSIZ+1];
        register char *cp, **q;
        register struct ixnet *usr = (struct ixnet *)u.u_ixnet;
        register int network_protocol = usr->u_networkprotocol;

        if (network_protocol == IX_NETWORK_AS225) {
            return SOCK_getservent(usr->u_SockBase);
        }
        else /*if (network_protocol == IX_NETWORK_AMITCP)*/ {
            if (servf == NULL && (servf = fopen(_TCP_PATH_SERVICES, "r" )) == NULL)
                return (NULL);
again:
            if ((p = fgets(line, BUFSIZ, servf)) == NULL)
                return (NULL);

            if (*p == '#')
                goto again;

            cp = strpbrk(p, "#\n");
            if (cp == NULL)
                goto again;

            *cp = '\0';
            serv.s_name = p;
            p = strpbrk(p, " \t");
            if (p == NULL)
                goto again;

            *p++ = '\0';
            while (*p == ' ' || *p == '\t')
                p++;

            cp = strpbrk(p, ",/");
            if (cp == NULL)
                goto again;

            *cp++ = '\0';
            serv.s_port = htons((u_short)atoi(p));
            serv.s_proto = cp;
            q = serv.s_aliases = serv_aliases;
            cp = strpbrk(cp, " \t");
            if (cp != NULL)
                *cp++ = '\0';

            while (cp && *cp) {
                if (*cp == ' ' || *cp == '\t') {
                    cp++;
                continue;
            }
            if (q < &serv_aliases[MAXALIASES - 1])
                *q++ = cp;

            cp = strpbrk(cp, " \t");
            if (cp != NULL)
                *cp++ = '\0';
        }
        *q = NULL;
        return (&serv);
    }
}