/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1999 by Sun Microsystems, Inc.
 * All rights reserved.
 */

/*
 * Implements SLPGetRefreshInterval. This call is an AttrRqst with
 * the special service type service:directory-agent.sun, sent
 * only to slpd via loopback, so it mimics the course of a normal
 * SLPFindAttrs call but reroutes the message to slpd.
 */

#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <netdb.h>
#include <slp-internal.h>

static SLPBoolean refresh_interval_cb(SLPHandle, const char *,
                                        SLPError, void *);

unsigned short SLPGetRefreshInterval() {
        slp_handle_impl_t *hp;  /* SLP handle for this request */
        SLPError err;           /* any SLPError */
        char *reply = NULL;     /* reply from slpd */
        void *collator = NULL;  /* attr collation handle */
        int mr = 0;             /* max results placeholder */
        unsigned short max = 0; /* max interval result cookie */
        char *msg = NULL;       /* attrrqst msg */
        char hostname[MAXHOSTNAMELEN];  /* name of this host */

        if ((err = SLPOpen("en", SLP_FALSE, (void **)&hp)) != SLP_OK) {
            slp_err(LOG_INFO, 0, "SLPGetRefreshInterval",
                    "Could not get SLPHandle: %s", slp_strerror(err));
            return (0);
        }

        /* tag this as an internal call */
        hp->internal_call = SLP_TRUE;

        /* scope is name of this host */
        (void) gethostname(hostname, MAXHOSTNAMELEN);

        if (slp_packAttrRqst_single(SLP_SUN_DA_TYPE,
                                    hostname,
                                    "min-refresh-interval",
                                    &msg, "en") != SLP_OK) {
            goto done;
        }

        if (slp_send2slpd(msg, &reply) != SLP_OK) {
            goto done;
        }

        (void) slp_UnpackAttrReply(hp, reply, refresh_interval_cb,
                                    &max, &collator, &mr);

        /* clean up by invoking last call */
        (void) slp_UnpackAttrReply(hp, NULL, refresh_interval_cb,
                                    &max, &collator, &mr);

done:
        if (msg) free(msg);
        if (reply) free(reply);

        SLPClose(hp);

        return (max);
}

/*ARGSUSED*/
static SLPBoolean refresh_interval_cb(SLPHandle h, const char *attrs,
                                        SLPError err, void *cookie) {
        char *p, *next;
        unsigned short *max = (unsigned short *)cookie;

        if (err != SLP_OK) {
            return (SLP_TRUE);
        }

        p = strchr(attrs, '=');
        if (!p) {
            *max = 0;
        }

        /* walk through all intervals, looking for the greatest */
        for (p++; p; p = next) {
            unsigned short anint;

            next = strchr(p, ',');
            if (next) {
                *next++ = 0;
            }

            anint = (unsigned short)atoi(p);
            if (anint > *max) {
                *max = anint;
            }
        }

        return (SLP_TRUE);
}