/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1996, 1998 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 ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC 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.
 */

/* Imports */

#include "port_before.h"

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <syslog.h>

#include <irs.h>
#include <irp.h>
#include <isc/memcluster.h>
#include <isc/irpmarshall.h>

#include "irs_p.h"
#include "irp_p.h"

#include "port_after.h"

/* Definitions */

struct pvt {
        struct irp_p           *girpdata;
        int                     warned;
};


/* Forward */

static void             ng_rewind(struct irs_ng *, const char*);
static void             ng_close(struct irs_ng *);
static int              ng_next(struct irs_ng *, const char **, const char **,
                                const char **);
static int              ng_test(struct irs_ng *, const char *,
                                const char *, const char *,
                                const char *);
static void             ng_minimize(struct irs_ng *);


/* Public */

/*%
 *      Intialize the irp netgroup module.
 *
 */

struct irs_ng *
irs_irp_ng(struct irs_acc *this) {
        struct irs_ng *ng;
        struct pvt *pvt;

        if (!(ng = memget(sizeof *ng))) {
                errno = ENOMEM;
                return (NULL);
        }
        memset(ng, 0x5e, sizeof *ng);

        if (!(pvt = memget(sizeof *pvt))) {
                memput(ng, sizeof *ng);
                errno = ENOMEM;
                return (NULL);
        }
        memset(pvt, 0, sizeof *pvt);
        pvt->girpdata = this->private;

        ng->private = pvt;
        ng->close = ng_close;
        ng->next = ng_next;
        ng->test = ng_test;
        ng->rewind = ng_rewind;
        ng->minimize = ng_minimize;
        return (ng);
}

/* Methods */



/*
 * void ng_close(struct irs_ng *this)
 *
 */

static void
ng_close(struct irs_ng *this) {
        struct pvt *pvt = (struct pvt *)this->private;

        ng_minimize(this);

        memput(pvt, sizeof *pvt);
        memput(this, sizeof *this);
}




/*
 * void ng_rewind(struct irs_ng *this, const char *group)
 *
 *
 */

static void
ng_rewind(struct irs_ng *this, const char *group) {
        struct pvt *pvt = (struct pvt *)this->private;
        char text[256];
        int code;

        if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
                return;
        }

        if (irs_irp_send_command(pvt->girpdata,
                                 "setnetgrent %s", group) != 0) {
                return;
        }

        code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
        if (code != IRPD_GETNETGR_SETOK) {
                if (irp_log_errors) {
                        syslog(LOG_WARNING, "setnetgrent(%s) failed: %s",
                               group, text);
                }
        }

        return;
}

/*
 *      Get the next netgroup item from the cache.
 *
 */

static int
ng_next(struct irs_ng *this, const char **host, const char **user,
        const char **domain)
{
        struct pvt *pvt = (struct pvt *)this->private;
        int code;
        char *body = NULL;
        size_t bodylen;
        int rval = 0;
        char text[256];

        if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
                return (0);
        }

        if (irs_irp_send_command(pvt->girpdata, "getnetgrent") != 0)
                return (0);

        if (irs_irp_get_full_response(pvt->girpdata, &code,
                                      text, sizeof text,
                                      &body, &bodylen) != 0) {
                return (0);
        }

        if (code == IRPD_GETNETGR_OK) {
                if (irp_unmarshall_ng(host, user, domain, body) == 0) {
                        rval = 1;
                }
        }

        if (body != NULL) {
                memput(body, bodylen);
        }

        return (rval);
}

/*
 *      Search for a match in a netgroup.
 *
 */

static int
ng_test(struct irs_ng *this, const char *name,
        const char *host, const char *user, const char *domain)
{
        struct pvt *pvt = (struct pvt *)this->private;
        char *body = NULL;
        size_t bodylen = 0;
        int code;
        char text[256];
        int rval = 0;

        UNUSED(name);

        if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) {
                return (0);
        }

        if (irp_marshall_ng(host, user, domain, &body, &bodylen) != 0) {
                return (0);
        }

        if (irs_irp_send_command(pvt->girpdata, "innetgr %s", body) == 0) {
                code = irs_irp_read_response(pvt->girpdata, text, sizeof text);
                if (code == IRPD_GETNETGR_MATCHES) {
                        rval = 1;
                }
        }

        memput(body, bodylen);

        return (rval);
}




/*
 * void ng_minimize(struct irs_ng *this)
 *
 */

static void
ng_minimize(struct irs_ng *this) {
        struct pvt *pvt = (struct pvt *)this->private;

        irs_irp_disconnect(pvt->girpdata);
}




/* Private */


/*! \file */