sdb/time/timedb.c

	timedb.c revision 499b34cea04a46823d003d4c0520c8b03e8513cb
4848fe4ad2c0ba6e2e69e4a2617727f8556d79a0Andreas Gustafsson/*
4848fe4ad2c0ba6e2e69e4a2617727f8556d79a0Andreas Gustafsson * Copyright (C) 2000, 2001  Internet Software Consortium.
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews *
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * Permission to use, copy, modify, and distribute this software for any
4848fe4ad2c0ba6e2e69e4a2617727f8556d79a0Andreas Gustafsson * purpose with or without fee is hereby granted, provided that the above
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews * copyright notice and this permission notice appear in all copies.
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews *
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
4848fe4ad2c0ba6e2e69e4a2617727f8556d79a0Andreas Gustafsson * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
4848fe4ad2c0ba6e2e69e4a2617727f8556d79a0Andreas Gustafsson * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉 */
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews/* $Id: timedb.c,v 1.7 2001/01/09 21:46:30 bwelling Exp $ */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉/*
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉 * A simple database driver that enables the server to return the
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * current time in a DNS record.
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews */
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews#include <config.h>
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews#include <string.h>
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews#include <stdio.h>
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews#include <time.h>
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews#include <isc/print.h>
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews#include <isc/result.h>
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews#include <isc/util.h>
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews#include <dns/sdb.h>
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews#include <named/globals.h>
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews#include "timedb.h"
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewsstatic dns_sdbimplementation_t *timedb = NULL;
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews/*
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * This database operates on relative names.
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews *
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * "time" and "@" return the time in a TXT record.
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * "clock" is a CNAME to "time"
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews * "current" is a DNAME to "@" (try time.current.time)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewsstatic isc_result_t
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewstimedb_lookup(const char *zone, const char *name, void *dbdata,
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews          dns_sdblookup_t *lookup)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews{
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    isc_result_t result;
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    UNUSED(zone);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    UNUSED(dbdata);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    if (strcmp(name, "@") == 0 || strcmp(name, "time") == 0) {
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        time_t now = time(NULL);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        char buf[100];
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        int n;
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        /*
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews         * Call ctime to create the string, put it in quotes, and
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews         * remove the trailing newline.
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews         */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        n = snprintf(buf, sizeof(buf), "\"%s", ctime(&now));
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews        if (n < 0)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews            return (ISC_R_FAILURE);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        buf[n - 1] = '\"';
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉        result = dns_sdb_putrr(lookup, "txt", 1, buf);
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉        if (result != ISC_R_SUCCESS)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews            return (ISC_R_FAILURE);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    } else if (strcmp(name, "clock") == 0) {
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        result = dns_sdb_putrr(lookup, "cname", 1, "time");
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        if (result != ISC_R_SUCCESS)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews            return (ISC_R_FAILURE);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    } else if (strcmp(name, "current") == 0) {
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        result = dns_sdb_putrr(lookup, "dname", 1, "@");
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉        if (result != ISC_R_SUCCESS)
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉            return (ISC_R_FAILURE);
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews    } else
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews        return (ISC_R_NOTFOUND);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    return (ISC_R_SUCCESS);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews}
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews/*
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews * lookup() does not return SOA or NS records, so authority() must be defined.
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewsstatic isc_result_t
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewstimedb_authority(const char *zone, void *dbdata, dns_sdblookup_t *lookup) {
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    isc_result_t result;
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    UNUSED(zone);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    UNUSED(dbdata);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    result = dns_sdb_putsoa(lookup, "localhost.", "root.localhost.", 0);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    if (result != ISC_R_SUCCESS)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        return (ISC_R_FAILURE);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    result = dns_sdb_putrr(lookup, "ns", 86400, "ns1.localdomain.");
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    if (result != ISC_R_SUCCESS)
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews        return (ISC_R_FAILURE);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    result = dns_sdb_putrr(lookup, "ns", 86400, "ns2.localdomain.");
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    if (result != ISC_R_SUCCESS)
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews        return (ISC_R_FAILURE);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews    return (ISC_R_SUCCESS);
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews}
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews/*
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews * This zone does not support zone transfer, so allnodes() is NULL.  There
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews * is no database specific data, so create() and destroy() are NULL.
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewsstatic dns_sdbmethods_t timedb_methods = {
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    timedb_lookup,
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    timedb_authority,
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    NULL,   /* allnodes */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    NULL,   /* create */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    NULL    /* destroy */
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews};
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews/*
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews * Wrapper around dns_sdb_register().
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrews */
ab6e5af4cd644b174709f95c2702ec4c442aa755Mark Andrewsisc_result_t
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewstimedb_init(void) {
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    unsigned int flags;
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    flags = DNS_SDBFLAG_RELATIVEOWNER | DNS_SDBFLAG_RELATIVERDATA;
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    return (dns_sdb_register("time", &timedb_methods, NULL, flags,
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉                 ns_g_mctx, &timedb));
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews}
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews
f620c5e527746a2ec3d90a11d21abd8a114746dfTatuya JINMEI 神明達哉/*
30d6e6e907dfd7a254796c70f49ed11979c0cc3bMark Andrews * Wrapper around dns_sdb_unregister().
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews */
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewsvoid
66f51d8678c8fcc7256354b599317f67455120fdMark Andrewstimedb_clear(void) {
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews    if (timedb != NULL)
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews        dns_sdb_unregister(&timedb);
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews}
66f51d8678c8fcc7256354b599317f67455120fdMark Andrews