common/irs/getprotoent.c

	getprotoent.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * Copyright 1997-2002 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 1996,1999 by Internet Software Consortium.
 *
 * 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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#if !defined(LINT) && !defined(CODECENTER)
static const char rcsid[] = "$Id: getprotoent.c,v 1.16 2001/11/01 07:34:33 marka Exp $";
#endif

/* Imports */

#include "port_before.h"

#if !defined(__BIND_NOSTATIC)

#include <sys/types.h>

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

#include <errno.h>
#include <resolv.h>
#include <stdio.h>
#include <string.h>

#include <irs.h>

#include "port_after.h"

#include "irs_data.h"

/* Forward */

static struct net_data *init(void);

/* Public */

struct protoent *
getprotoent() {
    struct net_data *net_data = init();

    return (getprotoent_p(net_data));
}

struct protoent *
getprotobyname(const char *name) {
    struct net_data *net_data = init();

    return (getprotobyname_p(name, net_data));
}

struct protoent *
getprotobynumber(int proto) {
    struct net_data *net_data = init();

    return (getprotobynumber_p(proto, net_data));
}

#ifdef  ORIGINAL_ISC_CODE
void
#else
int
#endif
setprotoent(int stayopen) {
    struct net_data *net_data = init();

    setprotoent_p(stayopen, net_data);
#ifdef  ORIGINAL_ISC_CODE
#else
    return (0);
#endif
}

#ifdef  ORIGINAL_ISC_CODE
void
#else
int
#endif
endprotoent() {
    struct net_data *net_data = init();

    endprotoent_p(net_data);
#ifdef  ORIGINAL_ISC_CODE
#else
    return (0);
#endif
}

/* Shared private. */

struct protoent *
getprotoent_p(struct net_data *net_data) {
    struct irs_pr *pr;

    if (!net_data || !(pr = net_data->pr))
        return (NULL);
    net_data->pr_last = (*pr->next)(pr);
    return (net_data->pr_last);
}

struct protoent *
getprotobyname_p(const char *name, struct net_data *net_data) {
    struct irs_pr *pr;
    char **pap;

    if (!net_data || !(pr = net_data->pr))
        return (NULL);
    if (net_data->pr_stayopen && net_data->pr_last) {
        if (!strcmp(net_data->pr_last->p_name, name))
            return (net_data->pr_last);
        for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++)
            if (!strcmp(name, *pap))
                return (net_data->pr_last);
    }
    net_data->pr_last = (*pr->byname)(pr, name);
    if (!net_data->pr_stayopen)
        endprotoent();
    return (net_data->pr_last);
}

struct protoent *
getprotobynumber_p(int proto, struct net_data *net_data) {
    struct irs_pr *pr;

    if (!net_data || !(pr = net_data->pr))
        return (NULL);
    if (net_data->pr_stayopen && net_data->pr_last)
        if (net_data->pr_last->p_proto == proto)
            return (net_data->pr_last);
    net_data->pr_last = (*pr->bynumber)(pr, proto);
    if (!net_data->pr_stayopen)
        endprotoent();
    return (net_data->pr_last);
}

void
setprotoent_p(int stayopen, struct net_data *net_data) {
    struct irs_pr *pr;

    if (!net_data || !(pr = net_data->pr))
        return;
    (*pr->rewind)(pr);
    net_data->pr_stayopen = (stayopen != 0);
    if (stayopen == 0)
        net_data_minimize(net_data);
}

void
endprotoent_p(struct net_data *net_data) {
    struct irs_pr *pr;

    if ((net_data != NULL) && ((pr = net_data->pr) != NULL))
        (*pr->minimize)(pr);
}

/* Private */

static struct net_data *
init() {
    struct net_data *net_data;

    if (!(net_data = net_data_init(NULL)))
        goto error;
    if (!net_data->pr) {
        net_data->pr = (*net_data->irs->pr_map)(net_data->irs);

        if (!net_data->pr || !net_data->res) {
 error:
            errno = EIO;
            return (NULL);
        }
        (*net_data->pr->res_set)(net_data->pr, net_data->res, NULL);
    }

    return (net_data);
}

#endif /*__BIND_NOSTATIC*/