mir/bind
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/bind9 synced 2025-08-23 02:28:55 +00:00
Code Issues Releases Wiki Activity
bind/lib/dns/zone.c
Mark Andrews 936f1c128f add log context to dns_zone_copy() 
fix various locking problems in zone.
1999-10-25 13:44:53 +00:00

3181 lines
78 KiB
C
Raw Blame History

/*
* Copyright (C) 1999 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.
*/
/* $Id: zone.c,v 1.27 1999/10/25 13:44:52 marka Exp $ */
#include <config.h>
#include <string.h>
#include <isc/assertions.h>
#include <isc/error.h>
#include <../isc/util.h> /* XXX MPA */
#include <isc/timer.h>
#include <isc/print.h>
#include <isc/serial.h>
#include <isc/magic.h>
#include <dns/confparser.h>
#include <dns/db.h>
#include <dns/dbiterator.h>
#include <dns/dispatch.h>
#include <dns/journal.h>
#include <dns/master.h>
#include <dns/message.h>
#include <dns/rcode.h>
#include <dns/rdata.h>
#include <dns/rdatalist.h>
#include <dns/rdatasetiter.h>
#include <dns/rdatastruct.h>
#include <dns/resolver.h>
#include <dns/view.h>
#include <dns/zone.h>
#include <dns/zt.h>
/* XXX remove once config changes are in place */
#define dns_zone_uptodate(x) dns_zone_logerror(x, "dns_zone_uptodate")
#define referral(x) ISC_FALSE
#include <stdarg.h>
#define ZONE_MAGIC 0x5a4f4e45U
#define CHECKSERVERS_MAGIC 0x43484346U
#define DNS_ZONE_VALID(zone) \
ISC_MAGIC_VALID(zone, ZONE_MAGIC)
#define DNS_CHECKSERVERS_VALID(server) \
ISC_MAGIC_VALID(zone, CHECKSERVERS_MAGIC)
#ifndef DNS_GLOBAL_OPTION /* XXX MPA */
#define DNS_GLOBAL_OPTION(o) 0
#endif
#define DEFAULT_REFRESH 900 /*XXX*/
#define DEFAULT_RETRY 300 /*XXX*/
#define MAX_XFER_TIME 3600 /*XXX*/
#define RANGE(a, b, c) (((a) < (b)) ? (b) : ((a) < (c) ? (a) : (c)))
#define DNS_MIN_REFRESH 2
#define DNS_MAX_REFRESH 2419200 /* 4 weeks */
#define DNS_MIN_RETRY 1
#define DNS_MAX_RETRY 1209600 /* 2 weeks */
#define DNS_MAX_EXPIRE 14515200 /* 24 weeks */
typedef enum {
get_a6, get_aaaa, get_a, get_ns, get_soa
} dns_zone_state_t;
typedef struct dns_zone_checkservers {
isc_uint32_t magic;
isc_boolean_t name_known;
dns_name_t server;
isc_sockaddr_t address;
dns_zone_state_t state;
dns_zone_t *zone;
dns_resolver_t *res;
isc_mem_t *mctx;
dns_fetch_t *fetch;
ISC_LINK(struct dns_zone_checkservers) link;
} dns_zone_checkservers_t;
struct dns_zone {
/* Unlocked */
unsigned int magic;
isc_mutex_t lock;
isc_mem_t *mctx;
/* Locked */
dns_db_t *top;
isc_timermgr_t *timgr;
isc_timer_t *timer;
unsigned int references;
dns_name_t origin;
char *database;
char *ixfrlog; /*
* XXX merge w/ updatelog to
* locate transaction log
*/
char *updatelog;
char *journal;
isc_int32_t ixfrlogsize;
dns_rdataclass_t rdclass;
dns_zonetype_t type;
unsigned int flags;
unsigned int options;
unsigned int setoptions;
char * db_type;
unsigned int db_argc;
char ** db_argv;
isc_stdtime_t expiretime;
isc_stdtime_t refreshtime;
isc_stdtime_t dumptime;
isc_stdtime_t servertime;
isc_stdtime_t parenttime;
isc_stdtime_t childtime;
isc_uint32_t serial;
isc_uint32_t refresh;
isc_uint32_t retry;
isc_uint32_t expire;
isc_uint32_t minimum;
isc_sockaddr_t * masters;
unsigned int masterscnt;
in_port_t masterport;
unsigned int curmaster;
isc_sockaddr_t * notify;
unsigned int notifycnt;
isc_sockaddr_t notifyfrom;
isc_task_t * task;
isc_sockaddr_t xfrsource;
/* Access Control Lists */
dns_c_ipmatchlist_t *update_acl;
dns_c_ipmatchlist_t *query_acl;
dns_c_ipmatchlist_t *xfr_acl;
dns_c_severity_t check_names;
dns_c_pubkey_t *pubkey;
ISC_LIST(dns_zone_checkservers_t) checkservers;
dns_fetch_t *fetch;
dns_resolver_t *res;
isc_socketmgr_t *socketmgr;
isc_uint32_t xfrtime;
isc_boolean_t diff_on_reload;
};
#define DNS_ZONE_FLAG(z,f) (((z)->flags & (f)) != 0)
/* XXX MPA these may need to go back into zone.h */
#define DNS_ZONE_F_REFRESH 0x00000001U /* refresh check in progress */
#define DNS_ZONE_F_NEEDDUMP 0x00000002U /* zone need consolidation */
#define DNS_ZONE_F_SERVERS 0x00000004U /* servers check in progress */
#define DNS_ZONE_F_PARENTS 0x00000008U /* parents check in progress */
#define DNS_ZONE_F_CHILDREN 0x00000010U /* child check in progress */
#define DNS_ZONE_F_LOADED 0x00000020U /* database has loaded */
#define DNS_ZONE_F_EXITING 0x00000040U /* zone is being destroyed */
#define DNS_ZONE_F_EXPIRED 0x00000080U /* zone has expired */
#define DNS_ZONE_F_NEEDREFRESH 0x00000100U /* refresh check needed */
#define DNS_ZONE_F_UPTODATE 0x00000200U /* zone contents are
* uptodate */
#define DNS_ZONE_OPTION(z,o) ((((z)->setoptions & (o)) != 0) ? \
(((z)->options & (o)) != 0) : \
DNS_GLOBAL_OPTION(o))
static void refresh_callback(isc_task_t *, isc_event_t *);
static void zone_shutdown(isc_task_t *, isc_event_t *);
static void soa_query(dns_zone_t *, isc_taskaction_t);
static dns_result_t zone_settimer(dns_zone_t *, isc_stdtime_t);
static void cancel_refresh(dns_zone_t *);
static dns_result_t dns_notify(dns_name_t *, isc_sockaddr_t *, dns_rdatatype_t,
dns_rdataclass_t, isc_sockaddr_t *, isc_mem_t *);
static void checkservers_callback(isc_task_t *task, isc_event_t *event);
static void dns_zone_logerror(dns_zone_t *zone, const char *msg, ...);
static int message_count(dns_message_t *msg, dns_section_t section,
dns_rdatatype_t type);
#if 0
static void sockaddr_fromaddr(isc_sockaddr_t *sockaddr, dns_c_addr_t *a,
in_port_t port);
#endif
static void add_address_tocheck(dns_message_t *msg,
dns_zone_checkservers_t *checkservers,
dns_rdatatype_t type);
extern void dns_zone_transfer_in(dns_zone_t *zone);
static void record_serial(void);
static dns_result_t dns_zone_tostr(dns_zone_t *zone, isc_mem_t *mctx, char **s);
static void unload(dns_zone_t *zone);
static void expire(dns_zone_t *zone);
static dns_result_t replacedb(dns_zone_t *zone, dns_db_t *db,
isc_boolean_t dump);
static dns_result_t default_journal(dns_zone_t *zone);
#define PRINT_ZONE_REF(zone) \
do { \
char *s = NULL; \
dns_result_t r; \
r = dns_zone_tostr(zone, zone->mctx, &s); \
if (r == DNS_R_SUCCESS) { \
printf("%p: %s: references = %d\n", zone, s, \
zone->references); \
isc_mem_free(zone->mctx, s); \
} \
} while (0)
/***
*** Public functions.
***/
dns_result_t
dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) {
isc_result_t iresult;
dns_zone_t *zone;
isc_sockaddr_t sockaddr_any;
REQUIRE(zonep != NULL && *zonep == NULL);
REQUIRE(mctx != NULL);
isc_sockaddr_fromin6(&sockaddr_any, &in6addr_any, 0);
zone = isc_mem_get(mctx, sizeof *zone);
if (zone == NULL)
return (DNS_R_NOMEMORY);
iresult = isc_mutex_init(&zone->lock);
if (iresult != ISC_R_SUCCESS) {
isc_mem_put(mctx, zone, sizeof *zone);
UNEXPECTED_ERROR(__FILE__, __LINE__,
"isc_mutex_init() failed: %s",
isc_result_totext(iresult));
return (DNS_R_UNEXPECTED);
}
/* XXX MPA check that all elements are initialised */
zone->mctx = mctx;
zone->top = NULL;
zone->timgr = NULL;
zone->references = 1; /* Implicit attach. */
dns_name_init(&zone->origin, NULL);
zone->database = NULL;
zone->ixfrlog = NULL;
zone->ixfrlogsize = -1;
zone->updatelog = NULL;
zone->journal = NULL;
zone->rdclass = dns_rdataclass_none;
zone->type = dns_zone_none;
zone->flags = 0;
zone->options = 0;
zone->setoptions = 0;
zone->db_type = NULL;
zone->db_argc = 0;
zone->db_argv = NULL;
zone->expiretime = 0;
zone->refreshtime = 0;
zone->dumptime = 0;
zone->servertime = 0;
zone->parenttime = 0;
zone->childtime = 0;
zone->serial = 0;
zone->refresh = DEFAULT_REFRESH;
zone->retry = DEFAULT_RETRY;
zone->expire = 0;
zone->minimum = 0;
zone->masters = NULL;
zone->masterscnt = 0;
zone->masterport = 0;
zone->curmaster = 0;
zone->notify = NULL;
zone->notifycnt = 0;
zone->task = NULL;
zone->update_acl = NULL;
zone->query_acl = NULL;
zone->xfr_acl = NULL;
zone->check_names = dns_c_severity_ignore;
zone->pubkey = NULL;
zone->fetch = NULL;
zone->res = NULL;
zone->socketmgr = NULL;
zone->timer = NULL;
ISC_LIST_INIT(zone->checkservers);
zone->xfrsource = sockaddr_any;
zone->xfrtime = MAX_XFER_TIME;
zone->diff_on_reload = ISC_FALSE;
zone->magic = ZONE_MAGIC;
#if 0
PRINT_ZONE_REF(zone);
#endif
*zonep = zone;
return (DNS_R_SUCCESS);
}
static void
zone_free(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
REQUIRE(zone->references == 0);
zone->flags |= DNS_ZONE_F_EXITING;
UNLOCK(&zone->lock);
/* managed objects */
/* order is important */
if (DNS_ZONE_FLAG(zone, DNS_ZONE_F_REFRESH))
cancel_refresh(zone);
if (zone->timer != NULL)
isc_timer_detach(&zone->timer);
if (zone->res != NULL)
dns_resolver_detach(&zone->res);
if (zone->fetch != NULL)
dns_resolver_destroyfetch(zone->res, &zone->fetch);
if (zone->timgr != NULL)
isc_timermgr_destroy(&zone->timgr);
if (zone->task != NULL)
isc_task_destroy(&zone->task);
if (zone->socketmgr != NULL)
isc_socketmgr_destroy(&zone->socketmgr);
/* unmanaged objects */
if (zone->database != NULL)
isc_mem_free(zone->mctx, zone->database);
zone->database = NULL;
if (zone->ixfrlog != NULL)
isc_mem_free(zone->mctx, zone->ixfrlog);
zone->ixfrlog = NULL;
zone->ixfrlogsize = -1;
if (zone->updatelog != NULL)
isc_mem_free(zone->mctx, zone->updatelog);
zone->updatelog = NULL;
if (zone->journal != NULL)
isc_mem_free(zone->mctx, zone->journal);
zone->journal = NULL;
if (zone->db_type != NULL)
isc_mem_free(zone->mctx, zone->db_type);
zone->db_type = NULL;
if (zone->top != NULL)
dns_db_detach(&zone->top);
dns_zone_cleardbargs(zone);
dns_zone_clearmasters(zone);
zone->masterport = 0;
dns_zone_clearnotify(zone);
zone->check_names = dns_c_severity_ignore;
zone->pubkey = NULL; /* XXX detach */
if (zone->update_acl != NULL)
dns_c_ipmatchlist_delete(NULL, &zone->update_acl);
if (zone->query_acl != NULL)
dns_c_ipmatchlist_delete(NULL, &zone->query_acl);
if (zone->xfr_acl != NULL)
dns_c_ipmatchlist_delete(NULL, &zone->xfr_acl);
if (dns_name_dynamic(&zone->origin))
dns_name_free(&zone->origin, zone->mctx);
/* last stuff */
isc_mutex_destroy(&zone->lock);
zone->magic = 0;
isc_mem_put(zone->mctx, zone, sizeof *zone);
}
/*
* Single shot.
*/
void
dns_zone_setclass(dns_zone_t *zone, dns_rdataclass_t rdclass) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(rdclass != dns_rdataclass_none);
/* test and set */
LOCK(&zone->lock);
REQUIRE(zone->rdclass == dns_rdataclass_none ||
zone->rdclass == rdclass);
zone->rdclass = rdclass;
UNLOCK(&zone->lock);
}
/*
* Single shot.
*/
void
dns_zone_settype(dns_zone_t *zone, dns_zonetype_t type) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(type != dns_zone_none);
/* test and set */
LOCK(&zone->lock);
REQUIRE(zone->type == dns_zone_none || zone->type == type);
zone->type = type;
UNLOCK(&zone->lock);
}
dns_result_t
dns_zone_setdbtype(dns_zone_t *zone, char *db_type) {
dns_result_t result = DNS_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->db_type != NULL)
isc_mem_free(zone->mctx, zone->db_type);
zone->db_type = isc_mem_strdup(zone->mctx, db_type);
if (zone->db_type == NULL)
result = DNS_R_NOMEMORY;
UNLOCK(&zone->lock);
return (result);
}
dns_result_t
dns_zone_setorigin(dns_zone_t *zone, char *origin) {
isc_buffer_t buffer;
dns_fixedname_t fixed;
dns_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(origin != NULL);
dns_fixedname_init(&fixed);
isc_buffer_init(&buffer, origin, strlen(origin), ISC_BUFFERTYPE_TEXT);
isc_buffer_add(&buffer, strlen(origin));
result = dns_name_fromtext(dns_fixedname_name(&fixed),
&buffer, dns_rootname, ISC_FALSE, NULL);
if (result != DNS_R_SUCCESS)
return (result);
LOCK(&zone->lock);
if (dns_name_dynamic(&zone->origin)) {
dns_name_free(&zone->origin, zone->mctx);
dns_name_init(&zone->origin, NULL);
}
result = dns_name_dup(dns_fixedname_name(&fixed), zone->mctx,
&zone->origin);
UNLOCK(&zone->lock);
return (result);
}
dns_result_t
dns_zone_setdatabase(dns_zone_t *zone, const char *database) {
dns_result_t result = DNS_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(database != NULL);
LOCK(&zone->lock);
if (zone->database != NULL)
isc_mem_free(zone->mctx, zone->database);
zone->database = isc_mem_strdup(zone->mctx, database);
if (zone->database == NULL)
result = DNS_R_NOMEMORY;
else
result = default_journal(zone);
UNLOCK(&zone->lock);
return (result);
}
static dns_result_t
default_journal(dns_zone_t *zone) {
int len;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->database != NULL);
if (zone->journal != NULL)
isc_mem_free(zone->mctx, zone->journal);
len = strlen(zone->database) + sizeof ".jnl"; /* includes '\0' */
zone->journal = isc_mem_allocate(zone->mctx, len);
if (zone->journal == NULL)
return (DNS_R_NOMEMORY);
strcpy(zone->journal, zone->database);
strcat(zone->journal, ".jnl");
return (DNS_R_SUCCESS);
}
dns_result_t
dns_zone_setjournal(dns_zone_t *zone, const char *journal) {
dns_result_t result = DNS_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(journal != NULL);
LOCK(&zone->lock);
if (zone->journal != NULL)
isc_mem_free(zone->mctx, zone->journal);
zone->journal = isc_mem_strdup(zone->mctx, journal);
if (zone->journal == NULL)
result = DNS_R_NOMEMORY;
UNLOCK(&zone->lock);
return (result);
}
char *
dns_zone_getjournal(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->journal);
}
dns_result_t
dns_zone_setupdatelog(dns_zone_t *zone, char *updatelog) {
dns_result_t result = DNS_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(updatelog != NULL);
LOCK(&zone->lock);
if (zone->updatelog != NULL)
isc_mem_free(zone->mctx, zone->updatelog);
zone->updatelog = isc_mem_strdup(zone->mctx, updatelog);
if (zone->updatelog == NULL)
result = DNS_R_NOMEMORY;
UNLOCK(&zone->lock);
return (result);
}
dns_result_t
dns_zone_setixfrlog(dns_zone_t *zone, const char *ixfrlog) {
dns_result_t result = DNS_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(ixfrlog != NULL);
LOCK(&zone->lock);
if (zone->ixfrlog != NULL)
isc_mem_free(zone->mctx, zone->ixfrlog);
zone->ixfrlog = isc_mem_strdup(zone->mctx, ixfrlog);
if (zone->ixfrlog == NULL)
result = DNS_R_NOMEMORY;
UNLOCK(&zone->lock);
return (result);
}
void
dns_zone_validate(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(dns_name_countlabels(&zone->origin) != 0);
REQUIRE(zone->type != dns_zone_none);
switch (zone->rdclass) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
case dns_zone_hint:
REQUIRE(zone->database != NULL);
/*FALLTHROUGH*/
case dns_zone_forward:
REQUIRE(zone->rdclass != dns_rdataclass_none);
break;
case dns_zone_cache:
REQUIRE(zone->rdclass == dns_rdataclass_none);
REQUIRE(zone->database == NULL);
break;
}
REQUIRE(zone->db_type != NULL);
}
dns_result_t
dns_zone_load(dns_zone_t *zone) {
int soacount = 0;
int nscount = 0;
dns_result_t result;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdataset_t rdataset;
isc_boolean_t cache = ISC_FALSE;
dns_rdata_soa_t soa;
dns_rdata_t rdata;
isc_stdtime_t now;
dns_db_t *db = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (isc_stdtime_get(&now) != ISC_R_SUCCESS) {
result = DNS_R_UNEXPECTED;
goto cleanup;
}
switch (zone->type) {
case dns_zone_forward:
case dns_zone_none:
result = DNS_R_SUCCESS;
goto cleanup;
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
case dns_zone_hint:
cache = ISC_FALSE;
break;
case dns_zone_cache:
cache = ISC_TRUE;
break;
default:
INSIST("bad zone type" == NULL);
}
REQUIRE(zone->database != NULL);
result = dns_db_create(zone->mctx, zone->db_type,
&zone->origin,
cache, zone->rdclass,
zone->db_argc, zone->db_argv, &db);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_db_load(db, zone->database);
/*
* Initiate zone transfer? We may need a error code that
* indicates that the "permanent" form does not exist.
* XXX better error feedback to log.
*/
if (result != DNS_R_SUCCESS) {
dns_zone_logerror(zone, "database %s: dns_db_load failed: %s",
zone->database,
dns_result_totext(result));
goto cleanup;
}
/*
* Apply update log, if any.
*/
if (zone->ixfrlog != NULL) {
result = dns_journal_rollforward(zone->mctx, db, zone->ixfrlog);
if (result != DNS_R_SUCCESS && result != DNS_R_NOTFOUND &&
result != DNS_R_UPTODATE)
goto cleanup;
if (result == DNS_R_SUCCESS)
zone->flags |= DNS_ZONE_F_NEEDDUMP;
}
/*
* Obtain ns and soa counts for top of zone.
*/
nscount = 0;
soacount = 0;
dns_db_currentversion(db, &version);
result = dns_db_findnode(db, &zone->origin, ISC_FALSE, &node);
if (result == DNS_R_SUCCESS) {
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version,
dns_rdatatype_ns,
dns_rdatatype_none, 0, &rdataset,
NULL);
if (result == DNS_R_SUCCESS) {
result = dns_rdataset_first(&rdataset);
while (result == DNS_R_SUCCESS) {
nscount++;
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
}
result = dns_db_findrdataset(db, node, version,
dns_rdatatype_soa,
dns_rdatatype_none, 0, &rdataset,
NULL);
if (result == DNS_R_SUCCESS) {
result = dns_rdataset_first(&rdataset);
while (result == DNS_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
if (soacount == 0)
dns_rdata_tostruct(&rdata, &soa,
zone->mctx);
soacount++;
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
}
dns_rdataset_invalidate(&rdataset);
}
dns_db_detachnode(db, &node);
dns_db_closeversion(db, &version, ISC_FALSE);
/*
* Master / Slave / Stub zones require both NS and SOA records at
* the top of the zone.
* Hint zones only require NS records.
* Cache zones have no reqirements.
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
if (soacount != 1 || nscount == 0) {
if (soacount != 1)
dns_zone_logerror(zone,
"has %d SOA record%s",
soacount,
(soacount != 0) ? "s" : "");
if (nscount == 0)
dns_zone_logerror(zone, "no NS records");
result = DNS_R_BADZONE;
goto cleanup;
}
if (zone->top != NULL) {
if (!isc_serial_gt(soa.serial, zone->serial)) {
dns_zone_logerror(zone,
"zone serial has gone backwards");
}
}
zone->serial = soa.serial;
zone->refresh = RANGE(soa.refresh, DNS_MIN_REFRESH,
DNS_MAX_REFRESH);
zone->retry = RANGE(soa.retry, DNS_MIN_REFRESH,
DNS_MAX_REFRESH);
zone->expire = RANGE(soa.expire, zone->refresh + zone->retry,
DNS_MAX_EXPIRE);
zone->minimum = soa.minimum;
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub) {
zone->expiretime = now /*XXX*/ + zone->expire;
zone->refreshtime = now + zone->refresh /*XXX*/;
}
break;
case dns_zone_hint:
if (nscount == 0) {
dns_zone_logerror(zone, "no NS records");
result = DNS_R_BADZONE;
goto cleanup;
}
break;
case dns_zone_cache:
break;
default:
UNEXPECTED_ERROR(__FILE__, __LINE__,
"unexpected zone type %d", zone->type);
result = DNS_R_UNEXPECTED;
goto cleanup;
}
if (zone->top != NULL) {
result = replacedb(zone, db, ISC_FALSE);
if (result != ISC_R_SUCCESS)
goto cleanup;
} else {
dns_db_attach(db, &zone->top);
zone->flags |= DNS_ZONE_F_LOADED;
}
result = ISC_R_SUCCESS;
cleanup:
UNLOCK(&zone->lock);
if (soacount != 0)
dns_rdata_freestruct(&soa);
if (db != NULL)
dns_db_detach(&db);
return (result);
}
#ifdef notyet
void
dns_zone_checkservers(dns_zone_t *zone) {
dns_name_t *zonename;
unsigned int i;
dns_zone_checkservers_t *checkservers;
dns_rdataset_t rdataset;
dns_rdata_t rdata;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_result_t result;
dns_rdata_ns_t ns;
REQUIRE(DNS_ZONE_VALID(zone));
/* XXX MPA */
/*
* get NS list from database, add in notify also list
*/
zonename = &zone->origin;
dns_db_currentversion(zone->top, &version);
result = dns_db_findnode(zone->top, zonename, ISC_FALSE, &node);
if (result == DNS_R_SUCCESS) {
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(zone->top, node, version,
dns_rdatatype_ns,
dns_rdatatype_none, 0, &rdataset,
NULL);
if (result == DNS_R_SUCCESS) {
result = dns_rdataset_first(&rdataset);
while (result == DNS_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, zone->mctx);
if (result != DNS_R_SUCCESS)
continue;
checkservers = isc_mem_get(zone->mctx,
sizeof *checkservers);
if (checkservers == NULL)
break;
dns_name_init(&checkservers->server, NULL);
dns_name_dup(&ns.name, zone->mctx,
&checkservers->server);
checkservers->name_known = ISC_TRUE;
checkservers->state = get_a; /* XXXMPA */
dns_zone_attach(zone, &checkservers->zone);
checkservers->mctx = zone->mctx;
dns_resolver_attach(zone->res, &checkservers->res);
checkservers->fetch = NULL;
ISC_LINK_INIT(checkservers, link);
checkservers->magic = CHECKSERVERS_MAGIC;
/* XXX lookup A/AAAA/A6 records */
result = dns_rdataset_next(&rdataset);
}
}
dns_rdataset_disassociate(&rdataset);
dns_rdataset_invalidate(&rdataset);
}
dns_db_detachnode(zone->top, &node);
dns_db_closeversion(zone->top, &version, ISC_FALSE);
/*
* Foreach NS in NS list perform a non-recursive query to obtain
* NS list for zone (remove self from list).
*
* callback to check:
* If NXDOMAIN -> log error.
* If NODATA -> log error.
* If referral -> log error.
* If non-auth -> log error.
* Compare NS list returned with server list if not identical
* log error if current list is at least 3 x refresh old.
* Compare glue A/AAAA/A6 records.
*/
/*
* Foreach NS in NS list perform a non-recursive query to obtain
* SOA record for zone (remove self from list).
*
* callback to check:
* If NXDOMAIN -> log error.
* If NODATA -> log error.
* If referral -> log error.
* If no-auth -> log error.
* Compare SOA serial with ixfr list and if older that 3x refresh
* log error.
*/
LOCK(&zone->lock);
for (i = 0 ; i < zone->notifycnt; i++) {
checkservers = isc_mem_get(zone->mctx, sizeof *checkservers);
if (checkservers == NULL)
break;
dns_name_init(&checkservers->server, NULL);
checkservers->name_known = ISC_FALSE;
checkservers->state = get_ns;
checkservers->address = zone->notify[i];
dns_zone_attach(zone, &checkservers->zone);
checkservers->mctx = zone->mctx;
dns_resolver_attach(zone->res, &checkservers->res);
checkservers->fetch = NULL;
ISC_LINK_INIT(checkservers, link);
checkservers->magic = CHECKSERVERS_MAGIC;
ISC_LIST_APPEND(zone->checkservers, checkservers, link);
dns_resolver_createfetch(zone->res, zonename, dns_rdatatype_ns,
NULL, NULL, NULL,
DNS_FETCHOPT_UNSHARED,
zone->task, checkservers_callback,
checkservers, &checkservers->fetch);
}
UNLOCK(&zone->lock);
}
#endif
#ifdef notyet
static void
checkservers_callback(isc_task_t *task, isc_event_t *event) {
dns_fetchdoneevent_t *devent = (dns_fetchdoneevent_t *)event;
dns_zone_checkservers_t *checkservers = event->arg;
dns_zone_state_t state;
dns_zone_t *zone;
dns_name_t *name;
isc_mem_t *mctx;
isc_sockaddr_t *address;
dns_resolver_t *res;
dns_message_t *msg;
char *master;
REQUIRE(DNS_CHECKSERVERS_VALID(checkservers));
state = checkservers->state;
zone = checkservers->zone;
name = &checkservers->server;
address = &checkservers->address;
mctx = checkservers->mctx;
res = checkservers->res;
task = task; /* unused */
master = isc_sockaddr_totext(&zone->masters[zone->curmaster],
zone->mctx);
if (devent->result != DNS_R_SUCCESS) {
/* timeout */
switch (state) {
case get_a6:
case get_aaaa:
case get_a:
dns_zone_logerror(zone,
"unable to obtain address for (%s)");
break;
case get_ns:
case get_soa:
dns_zone_logerror(zone,
"unable to obtain %s RRset from %s"
);
}
goto cleanup;
}
msg = NULL;
dns_resolver_getanswer(event, &msg);
switch (state) {
case get_a6:
add_address_tocheck(msg, checkservers, dns_rdatatype_a6);
dns_resolver_createfetch(res, name, dns_rdatatype_aaaa,
NULL, NULL, NULL, 0, zone->task,
checkservers_callback,
checkservers, &checkservers->fetch);
checkservers->state = get_aaaa;
break;
case get_aaaa:
add_address_tocheck(msg, checkservers, dns_rdatatype_a6);
dns_resolver_createfetch(res, name, dns_rdatatype_a,
NULL, NULL, NULL, 0, zone->task,
checkservers_callback,
checkservers, &checkservers->fetch);
checkservers->state = get_a;
break;
case get_a:
add_address_tocheck(msg, checkservers, dns_rdatatype_a);
/* make NS query to address */
dns_resolver_createfetch(res, name, dns_rdatatype_ns,
NULL, NULL, NULL,
DNS_FETCHOPT_UNSHARED,
zone->task, checkservers_callback,
checkservers, &checkservers->fetch);
checkservers->state = get_ns;
break;
case get_ns:
case get_soa:
if (msg->rcode != dns_rcode_noerror) {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof rcode,
ISC_BUFFERTYPE_TEXT);
dns_rcode_totext(msg->rcode, &rb);
dns_zone_logerror(zone,
"server %s (%s) unexpected rcode = %.*s",
rb.used, rcode);
break;
}
if (msg->counts[DNS_SECTION_ANSWER] == 0) {
if (referral(msg))
dns_zone_logerror(zone,
"server %s (%s) referral response");
else
dns_zone_logerror(zone,
"server %s (%s) type = %s NODATA response");
}
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) {
dns_zone_logerror(zone,
"server %s (%s) not authorative");
}
if (state == get_ns) {
/* compare NS RR sets */
/* make soa query to address */
dns_resolver_createfetch(res, name, dns_rdatatype_soa,
NULL, NULL, NULL,
DNS_FETCHOPT_UNSHARED,
zone->task,
checkservers_callback,
checkservers,
&checkservers->fetch);
checkservers->state = get_soa;
break;
} else {
/* compare SOA RR sets */
goto cleanup;
}
break;
default:
UNEXPECTED_ERROR(__FILE__, __LINE__, "unexpected state");
break;
}
isc_event_free(&event);
return;
cleanup:
isc_event_free(&event);
ISC_LIST_UNLINK(zone->checkservers, checkservers, link);
checkservers->magic = 0;
dns_zone_detach(&checkservers->zone);
isc_mem_put(mctx, checkservers, sizeof *checkservers);
}
#endif
#if 0
static void
cmp_soa(dns_message_t *msg, dns_zone_t *zone, char *server) {
dns_rdata_soa_t msgsoa, zonesoa;
dns_result_t result;
dns_rdataset_t *rdataset = NULL;
dns_rdataset_t zonerdataset;
dns_rdata_t rdata;
dns_rdata_init(&rdata);
/*
* extract SOA from message
*/
result = dns_message_findname(msg, DNS_SECTION_ANSWER,
&zone->origin,
dns_rdatatype_soa,
dns_rdatatype_none, NULL, &rdataset);
if (result != DNS_R_SUCCESS) {
dns_zone_logerror(zone,
"Unable to extract SOA from answer: %s",
server);
return;
}
result = dns_rdataset_first(rdataset);
if (DNS_R_SUCCESS != result)
return;
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &msgsoa, zone->mctx);
if (DNS_R_SUCCESS != result)
return;
result = dns_rdataset_next(rdataset);
if (DNS_R_NOMORE != result) {
dns_zone_logerror(zone,
"More that one SOA record returned: %s",
server);
goto cleanup_msgsoa;
}
/*
* Get SOA record for zone.
*/
dns_rdataset_init(&zonerdataset);
LOCK(&zone->lock);
result = dns_db_find(zone->top, &zone->origin,
NULL, dns_rdatatype_soa, dns_rdatatype_none,
0, 0, NULL, NULL, &zonerdataset);
UNLOCK(&zone->lock);
if (result != DNS_R_SUCCESS) {
/* XXXMPA */
goto cleanup_msgsoa;
}
result = dns_rdataset_first(&zonerdataset);
if (DNS_R_SUCCESS != result)
return;
dns_rdataset_current(&zonerdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &msgsoa, zone->mctx);
if (DNS_R_SUCCESS != result)
return;
result = dns_rdataset_next(&zonerdataset);
if (DNS_R_NOMORE != result) {
dns_zone_logerror(zone, "More that one SOA in zone");
goto cleanup_msgsoa;
}
dns_rdataset_disassociate(&zonerdataset);
/*
* Check SOA contents. If serials do not match check to see
* if the slave is ahead of us (i.e. we have reset the serial
* number).
*
* If the serials do match then check the other values for
* consistancy.
*/
if (msgsoa.serial != zonesoa.serial) {
if (!isc_serial_lt(msgsoa.serial, zonesoa.serial)) {
dns_zone_logerror(zone,
"slave serial not less than or equal to zone serial: %s",
server);
goto cleanup_zonesoa;
}
record_serial();
goto cleanup_zonesoa;
}
if (msgsoa.refresh != zonesoa.refresh ||
msgsoa.retry != zonesoa.retry ||
msgsoa.expire != zonesoa.expire ||
msgsoa.minimum != zonesoa.minimum ||
dns_name_compare(&msgsoa.origin, &zonesoa.origin) != 0 ||
dns_name_compare(&msgsoa.mname, &zonesoa.mname) != 0) {
dns_zone_logerror(zone, "SOA contents differ: %s",
server);
}
cleanup_zonesoa:
dns_rdata_freestruct(&zonesoa);
cleanup_msgsoa:
dns_rdata_freestruct(&msgsoa);
}
#endif
static void
add_address_tocheck(dns_message_t *msg, dns_zone_checkservers_t *checkservers,
dns_rdatatype_t type)
{
dns_rdataset_t *rdataset = NULL;
dns_result_t result;
isc_sockaddr_t sockaddr;
dns_rdata_in_a_t a;
dns_rdata_in_a6_t a6;
dns_rdata_t rdata;
if (msg->rcode != dns_rcode_noerror)
return;
if (msg->counts[DNS_SECTION_QUESTION] != 0 ||
dns_message_findname(msg, DNS_SECTION_QUESTION,
&checkservers->server,
type, dns_rdatatype_none,
NULL, &rdataset) != DNS_R_SUCCESS)
return;
result = dns_rdataset_first(rdataset);
while (DNS_R_SUCCESS == result) {
dns_rdataset_current(rdataset, &rdata);
switch (type) {
case dns_rdatatype_a:
result = dns_rdata_tostruct(&rdata, &a,
checkservers->mctx);
isc_sockaddr_fromin(&sockaddr, &a.in_addr, 0);
dns_rdata_freestruct(&a);
break;
case dns_rdatatype_a6:
result = dns_rdata_tostruct(&rdata, &a6,
checkservers->mctx);
isc_sockaddr_fromin6(&sockaddr, &a6.in6_addr, 0);
dns_rdata_freestruct(&a6);
break;
default:
INSIST(0);
}
result = dns_rdataset_next(rdataset);
}
}
void
dns_zone_checkparents(dns_zone_t *zone) {
/* XXX MPA */
REQUIRE(DNS_ZONE_VALID(zone));
/*
* Obtain a parent NS list.
* Remove LSL from zone name. Check to see if we are serving
* zone otherwise make non-recursive query for NS set of
* of given name. Follow referral until NXDOMAIN, NODATA or
* answer is found. If NXDOMAIN or NODATA remove next LSL
* and repeat.
*/
/*
* If self in NS list check masked NS list in parent against zone
* ns list.
*
* Foreach NS on parent NS list make non recursive query for NS set
* of current zone (removed self from list if required).
*
* Check NS list return for agreement with zone's NS list.
*/
}
void
dns_zone_checkchildren(dns_zone_t *zone) {
/* XXX MPA */
REQUIRE(DNS_ZONE_VALID(zone));
/*
* For each child zone obtain NS list from parent zone.
* For each NS in list send non-recursive query for child zone's
* NS list for zone.
*
* If NXDOMAIN is returned log error.
* If NODATA is return log error.
* If referral is return log error.
* If non-auth is return log error.
* If NS list disagree's with parents NS list log error.
*/
}
void
dns_zone_checkglue(dns_zone_t *zone) {
/* XXX MPA */
REQUIRE(DNS_ZONE_VALID(zone));
/*
* For each glue record in this zone, check with an authorative
* server for the zone to ensure that there have not been any
* changes.
*/
}
void
dns_zone_attach(dns_zone_t *source, dns_zone_t **target) {
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
LOCK(&source->lock);
REQUIRE(source->references > 0);
source->references++;
#if 0
PRINT_ZONE_REF(source);
#endif
INSIST(source->references != 0xffffffffU);
UNLOCK(&source->lock);
*target = source;
}
void
dns_zone_print(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
PRINT_ZONE_REF(zone);
}
static dns_result_t
dns_zone_tostr(dns_zone_t *zone, isc_mem_t *mctx, char **s) {
isc_buffer_t tbuf;
char outbuf[1024];
dns_result_t result;
REQUIRE(s != NULL && *s == NULL);
REQUIRE(DNS_ZONE_VALID(zone));
isc_buffer_init(&tbuf, outbuf, sizeof(outbuf) - 1,
ISC_BUFFERTYPE_TEXT);
if (dns_name_countlabels(&zone->origin) > 0) {
result = dns_name_totext(&zone->origin, ISC_FALSE, &tbuf);
if (result == DNS_R_SUCCESS)
outbuf[tbuf.used] = '\0';
else {
strncpy(outbuf, "<name conversion failed>",
sizeof outbuf - 1);
outbuf[sizeof outbuf - 1] = '\0';
}
} else {
strncpy(outbuf, "<unnamed zone>", sizeof outbuf - 1);
outbuf[sizeof outbuf - 1] = '\0';
}
*s = isc_mem_strdup(mctx, outbuf);
return ((*s == NULL) ? DNS_R_NOMEMORY : DNS_R_SUCCESS);
}
void
dns_zone_detach(dns_zone_t **zonep) {
dns_zone_t *zone;
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
LOCK(&zone->lock);
REQUIRE(zone->references > 0);
zone->references--;
#if 0
PRINT_ZONE_REF(zone);
#endif
UNLOCK(&zone->lock);
if (zone->references == 0)
zone_free(zone);
*zonep = NULL;
}
void
dns_zone_setflag(dns_zone_t *zone, unsigned int flags, isc_boolean_t value) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (value)
zone->flags |= flags;
else
zone->flags &= ~flags;
UNLOCK(&zone->lock);
}
void
dns_zone_setoption(dns_zone_t *zone, unsigned int option, isc_boolean_t value)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (value)
zone->options |= option;
else
zone->options &= ~option;
zone->setoptions |= option;
UNLOCK(&zone->lock);
}
void
dns_zone_clearoption(dns_zone_t *zone, unsigned int option) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
zone->setoptions &= ~option;
UNLOCK(&zone->lock);
}
void
dns_zone_getoptions(dns_zone_t *zone, unsigned int *options,
unsigned int *optionsmask)
{
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(options != NULL);
REQUIRE(optionsmask != NULL);
LOCK(&zone->lock);
*options = zone->options;
*optionsmask = zone->setoptions;
UNLOCK(&zone->lock);
}
dns_result_t
dns_zone_adddbarg(dns_zone_t *zone, char *arg) {
char **new = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(arg != NULL);
/*
* Allocate new 'db_argv' and set last to be copy of 'arg'.
*/
LOCK(&zone->lock);
new = isc_mem_get(zone->mctx, (zone->db_argc + 1) * sizeof *new);
if (new == NULL)
goto cleanup;
new[zone->db_argc] = isc_mem_strdup(zone->mctx, arg);
if (new[zone->db_argc] == NULL)
goto cleanup;
/*
* Copy old 'db_argv' if required the free it.
*/
if (zone->db_argc != 0) {
memcpy(new, zone->db_argv, zone->db_argc * sizeof *new);
isc_mem_put(zone->mctx, zone->db_argv,
zone->db_argc * sizeof *new);
}
zone->db_argv = new;
zone->db_argc++;
UNLOCK(&zone->lock);
return (DNS_R_SUCCESS);
cleanup:
if (new != NULL)
isc_mem_put(zone->mctx, new,
(zone->db_argc + 1) * sizeof *new);
UNLOCK(&zone->lock);
return (DNS_R_NOMEMORY);
}
void
dns_zone_cleardbargs(dns_zone_t *zone) {
unsigned int i;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->db_argc) {
for (i = 0 ; i < zone->db_argc; i++)
isc_mem_free(zone->mctx, zone->db_argv[i]);
isc_mem_put(zone->mctx, zone->db_argv,
zone->db_argc * sizeof *zone->db_argv);
zone->db_argc = 0;
zone->db_argv = NULL;
}
UNLOCK(&zone->lock);
}
dns_result_t
dns_zone_setxfrsource(dns_zone_t *zone, isc_sockaddr_t *xfrsource) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
zone->xfrsource = *xfrsource;
UNLOCK(&zone->lock);
return (DNS_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getxfrsource(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->xfrsource);
}
dns_result_t
dns_zone_addnotify(dns_zone_t *zone, isc_sockaddr_t *notify) {
isc_sockaddr_t *new;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
new = isc_mem_get(zone->mctx, (zone->notifycnt + 1) * sizeof *new);
if (new == NULL)
goto cleanup;
new[zone->notifycnt] = *notify;
if (zone->notifycnt > 0) {
memcpy(new, zone->notify, zone->notifycnt * sizeof *new);
isc_mem_put(zone->mctx, zone->notify,
zone->notifycnt * sizeof *new);
}
zone->notify = new;
zone->notifycnt++;
UNLOCK(&zone->lock);
return (DNS_R_SUCCESS);
cleanup:
UNLOCK(&zone->lock);
return (DNS_R_NOMEMORY);
}
void
dns_zone_clearnotify(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->notify != NULL) {
isc_mem_put(zone->mctx, zone->notify,
zone->notifycnt * sizeof *zone->notify);
zone->notify = NULL;
zone->notifycnt = 0;
}
UNLOCK(&zone->lock);
}
dns_result_t
dns_zone_addmaster(dns_zone_t *zone, isc_sockaddr_t *master) {
isc_sockaddr_t *new;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
new = isc_mem_get(zone->mctx, (zone->masterscnt + 1) * sizeof *new);
if (new == NULL) {
UNLOCK(&zone->lock);
return (DNS_R_NOMEMORY);
}
new[zone->masterscnt] = *master;
if (zone->masterscnt > 0) {
memcpy(new, zone->masters, zone->masterscnt * sizeof *new);
isc_mem_put(zone->mctx, zone->masters,
zone->masterscnt * sizeof *new);
}
zone->masters = new;
zone->masterscnt++;
UNLOCK(&zone->lock);
return (DNS_R_SUCCESS);
}
void
dns_zone_clearmasters(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
while (DNS_ZONE_FLAG(zone, DNS_ZONE_F_REFRESH)) {
UNLOCK(&zone->lock);
cancel_refresh(zone);
LOCK(&zone->lock);
}
if (zone->masters != NULL) {
isc_mem_put(zone->mctx, zone->masters,
zone->masterscnt * sizeof *zone->masters);
zone->masters = NULL;
zone->masterscnt = 0;
zone->curmaster = 0;
}
UNLOCK(&zone->lock);
}
dns_result_t
dns_zone_getdb(dns_zone_t *zone, dns_db_t **dpb) {
dns_result_t result = DNS_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->top == NULL)
result = DNS_R_NOTLOADED;
else
dns_db_attach(zone->top, dpb);
UNLOCK(&zone->lock);
return (result);
}
/*
* Co-ordinates the starting of routine jobs.
*/
void
dns_zone_maintenance(dns_zone_t *zone) {
isc_stdtime_t now;
REQUIRE(DNS_ZONE_VALID(zone));
fprintf(stderr, "dns_zone_maintenance\n");
if (isc_stdtime_get(&now) != ISC_R_SUCCESS)
return;
/*
* Expire check.
*/
switch (zone->type) {
case dns_zone_slave:
case dns_zone_stub:
LOCK(&zone->lock);
if (now >= zone->expiretime &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED)) {
expire(zone);
zone->refreshtime = now;
}
UNLOCK(&zone->lock);
break;
default:
break;
}
/*
* Up to date check.
*/
switch (zone->type) {
case dns_zone_slave:
case dns_zone_stub:
if (now >= zone->refreshtime)
dns_zone_refresh(zone);
break;
default:
break;
}
/*
* Do we need to consolidate the backing store?
*/
switch (zone->type) {
case dns_zone_master:
LOCK(&zone->lock);
if (now >= zone->dumptime &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED) &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_NEEDDUMP)) {
dns_zone_dump(zone, stdout);
}
UNLOCK(&zone->lock);
break;
default:
break;
}
/*
* Check servers for zone.
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
#ifdef notyet
if (now >= zone->servertime &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED) &&
DNS_ZONE_OPTION(zone, DNS_ZONE_O_SERVERS) &&
!DNS_ZONE_FLAG(zone, DNS_ZONE_F_SERVERS))
dns_zone_checkservers(zone);
#endif
break;
default:
break;
}
/*
* Check parent servers for zone.
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
if (now >= zone->parenttime &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED) &&
DNS_ZONE_OPTION(zone, DNS_ZONE_O_PARENTS) &&
!DNS_ZONE_FLAG(zone, DNS_ZONE_F_PARENTS))
dns_zone_checkparents(zone);
break;
default:
break;
}
/*
* Check child servers for zone.
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
if (now >= zone->childtime &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED) &&
DNS_ZONE_OPTION(zone, DNS_ZONE_O_CHILDREN) &&
!DNS_ZONE_FLAG(zone, DNS_ZONE_F_CHILDREN))
dns_zone_checkchildren(zone);
break;
default:
break;
}
(void) zone_settimer(zone, now); /*XXX*/
}
void
dns_zone_expire(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
expire(zone);
UNLOCK(&zone->lock);
}
static void
expire(dns_zone_t *zone) {
if (DNS_ZONE_FLAG(zone, DNS_ZONE_F_NEEDDUMP))
dns_zone_dump(zone, stdout); /* XXX */
zone->flags |= DNS_ZONE_F_EXPIRED;
dns_zone_setrefresh(zone, DEFAULT_REFRESH, DEFAULT_RETRY);
unload(zone);
}
void
dns_zone_refresh(dns_zone_t *zone) {
isc_stdtime_t now;
isc_uint32_t oldflags;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->masterscnt > 0);
if (isc_stdtime_get(&now) != ISC_R_SUCCESS)
return;
/*
* Set DNS_ZONE_F_REFRESH so that there is only one refresh operation
* in progress at the one time.
*/
LOCK(&zone->lock);
oldflags = zone->flags;
zone->flags |= DNS_ZONE_F_REFRESH;
UNLOCK(&zone->lock);
if ((oldflags & DNS_ZONE_F_REFRESH) != 0)
return;
/*
* Set the next refresh time as if refresh check has failed.
* If we are successful it will be reset using zone->refresh.
*/
zone->refreshtime = now + zone->retry;
zone->curmaster = 0;
/* initiate soa query */
#ifdef notyet
soa_query(zone, refresh_callback);
#endif
}
dns_result_t
dns_zone_dump(dns_zone_t *zone, FILE *fd) {
dns_dbiterator_t *dbiterator = NULL;
dns_dbversion_t *version = NULL;
dns_result_t result;
dns_fixedname_t fname;
dns_name_t *name;
dns_rdatasetiter_t *rdsiter = NULL;
dns_dbnode_t *node = NULL;
isc_buffer_t text;
isc_region_t region;
char *buf = NULL;
unsigned int buflen = 1024;
dns_rdataset_t rdataset;
dns_db_t *top = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
dns_fixedname_init(&fname);
name = dns_fixedname_name(&fname);
dns_db_attach(zone->top, &top);
dns_db_currentversion(top, &version);
result = dns_db_createiterator(top, ISC_FALSE, &dbiterator);
if (result == DNS_R_SUCCESS)
result = dns_dbiterator_first(dbiterator);
while (result == DNS_R_SUCCESS) {
result = dns_dbiterator_current(dbiterator, &node, name);
if (result != DNS_R_SUCCESS && result != DNS_R_NEWORIGIN)
break;
result = dns_db_allrdatasets(zone->top, node, version, 0,
&rdsiter);
if (result != DNS_R_SUCCESS) {
dns_db_detachnode(top, &node);
break;
}
dns_rdataset_init(&rdataset);
result = dns_rdatasetiter_first(rdsiter);
while (result == DNS_R_SUCCESS) {
dns_rdatasetiter_current(rdsiter, &rdataset);
retry:
if (buf == NULL)
buf = isc_mem_get(zone->mctx, buflen);
if (buf == NULL)
result = DNS_R_NOMEMORY;
isc_buffer_init(&text, buf, buflen,
ISC_BUFFERTYPE_TEXT);
if (result == DNS_R_SUCCESS)
result = dns_rdataset_totext(&rdataset, name,
ISC_FALSE,
ISC_FALSE, &text);
if (result == DNS_R_NOSPACE) {
isc_mem_put(zone->mctx, buf, buflen);
buf = NULL;
buflen += 1024;
goto retry;
}
isc_buffer_used(&text, &region);
if (result == DNS_R_SUCCESS)
fprintf(fd, "%.*s", (int)region.length,
(char *)region.base);
dns_rdataset_disassociate(&rdataset);
if (result == DNS_R_SUCCESS)
result = dns_rdatasetiter_next(rdsiter);
}
dns_rdatasetiter_destroy(&rdsiter);
dns_db_detachnode(top, &node);
if (result == DNS_R_NOMORE)
result = dns_dbiterator_next(dbiterator);
}
if (buf != NULL)
isc_mem_put(zone->mctx, buf, buflen);
dns_dbiterator_destroy(&dbiterator);
dns_db_closeversion(top, &version, ISC_FALSE);
dns_db_detach(&top);
return (result);
}
void
dns_zone_unload(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
unload(zone);
UNLOCK(&zone->lock);
}
static void
unload(dns_zone_t *zone) {
/* caller to lock */
dns_db_detach(&zone->top);
zone->flags &= ~DNS_ZONE_F_LOADED;
}
void
dns_zone_unmount(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
/*XXX MPA*/
}
dns_result_t
dns_zone_manage(dns_zone_t *zone, isc_taskmgr_t *tmgr) {
#if 1
(void)zone;
(void)tmgr;
return (DNS_R_NOTIMPLEMENTED);
#else
isc_result_t iresult;
dns_result_t result;
/*
* XXXRTH Zones do not have resolvers!!!!
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->task == NULL);
REQUIRE(zone->timgr == NULL);
iresult = isc_task_create(tmgr, zone->mctx, 0, &zone->task);
if (iresult != ISC_R_SUCCESS) {
/* XXX */
return (DNS_R_UNEXPECTED);
}
iresult = isc_task_onshutdown(zone->task, zone_shutdown, zone);
if (iresult != ISC_R_SUCCESS) {
/* XXX */
return (DNS_R_UNEXPECTED);
}
iresult = isc_timermgr_create(zone->mctx, &zone->timgr);
if (iresult != ISC_R_SUCCESS) {
/* XXX */
return (DNS_R_UNEXPECTED);
}
if (zone->res == NULL) {
isc_socket_t *s;
dns_dispatch_t *dispatch;
RUNTIME_CHECK(isc_socketmgr_create(zone->mctx, &zone->socketmgr)
== ISC_R_SUCCESS);
s = NULL;
RUNTIME_CHECK(isc_socket_create(zone->socketmgr, PF_INET,
isc_sockettype_udp, &s) == ISC_R_SUCCESS);
dispatch = NULL;
RUNTIME_CHECK(dns_dispatch_create(zone->mctx, s, zone->task,
4096, 1000, 1000, 4, &dispatch) == DNS_R_SUCCESS);
result = dns_resolver_create(zone->mctx, tmgr, 10, zone->timgr,
zone->rdclass, dispatch,
&zone->res);
if (result != DNS_R_SUCCESS)
return (result);
dns_dispatch_detach(&dispatch);
isc_socket_detach(&s);
}
dns_zone_maintenance(zone);
return (DNS_R_SUCCESS);
#endif
}
void
dns_zone_setrefresh(dns_zone_t *zone, isc_uint32_t refresh,
isc_uint32_t retry)
{
REQUIRE(DNS_ZONE_VALID(zone));
zone->refresh = refresh;
zone->retry = retry;
}
void
dns_zone_notify(dns_zone_t *zone) {
unsigned int i;
dns_name_t *origin = NULL;
isc_sockaddr_t addr;
dns_rdataset_t nsrdset;
dns_rdataset_t ardset;
dns_dbversion_t *version = NULL;
dns_result_t result;
dns_dbnode_t *node = NULL;
dns_rdata_ns_t ns;
dns_rdata_in_a_t a;
dns_rdata_t rdata;
REQUIRE(DNS_ZONE_VALID(zone));
if (!DNS_ZONE_OPTION(zone, DNS_ZONE_O_NOTIFY))
return;
origin = &zone->origin;
/*
* Enqueue notify request.
*/
for (i = 0; i < zone->notifycnt; i++) {
(void)dns_notify(origin, &zone->notify[i], dns_rdatatype_soa,
zone->rdclass, &zone->xfrsource, zone->mctx);
}
dns_db_currentversion(zone->top, &version);
result = dns_db_findnode(zone->top, origin, ISC_FALSE, &node);
if (result != DNS_R_SUCCESS)
goto cleanup1;
dns_rdataset_init(&nsrdset);
result = dns_db_findrdataset(zone->top, node, version,
dns_rdatatype_ns,
dns_rdatatype_none, 0, &nsrdset, NULL);
if (result != DNS_R_SUCCESS)
goto cleanup2;
result = dns_rdataset_first(&nsrdset);
while (result == DNS_R_SUCCESS) {
dns_rdataset_current(&nsrdset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, zone->mctx);
if (result != DNS_R_SUCCESS)
continue;
/*
* Look up address records.
*/
/* XXX MPA */
if (result == DNS_R_NOTFOUND) {
/*
* Query for address.
* Arrange for notify to be sent when
* we have it.
*/
/* XXX MPA*/
result = dns_rdataset_next(&nsrdset);
continue;
} else if (result != DNS_R_SUCCESS) {
result = dns_rdataset_next(&nsrdset);
continue;
}
result = dns_rdataset_first(&ardset);
while (result == DNS_R_SUCCESS) {
dns_rdataset_current(&ardset, &rdata);
result = dns_rdata_tostruct(&rdata, &a, zone->mctx);
if (result != DNS_R_SUCCESS)
continue;
/*
* Remove duplicates w/ notify list.
*/
isc_sockaddr_fromin(&addr, &a.in_addr, 0);
for (i = 0; i < zone->notifycnt; i++) {
if (isc_sockaddr_equal(&zone->notify[i], &addr))
break;
}
if (i == zone->notifycnt) {
(void)dns_notify(origin, &addr,
dns_rdatatype_soa,
zone->rdclass,
&zone->xfrsource, zone->mctx);
}
result = dns_rdataset_next(&ardset);
}
result = dns_rdataset_next(&nsrdset);
}
dns_rdataset_disassociate(&nsrdset);
cleanup2:
dns_db_detachnode(zone->top, &node);
cleanup1:
dns_db_closeversion(zone->top, &version, ISC_FALSE);
}
/***
*** Private
***/
static void
refresh_callback(isc_task_t *task, isc_event_t *event) {
#if 1
(void)task;
(void)event;
#else
dns_fetchevent_t *devent = (dns_fetchevent_t *)event;
dns_zone_t *zone;
dns_message_t *msg = NULL;
isc_uint32_t soacnt, cnamecnt, soacount, nscount;
isc_stdtime_t now;
char *master;
char *unknown = "<UNKNOWN>";
dns_rdataset_t *rdataset;
dns_rdata_t rdata;
dns_rdata_soa_t soa;
dns_result_t result;
isc_uint32_t serial;
zone = devent->arg;
INSIST(DNS_ZONE_VALID(zone));
/*
* if timeout log and next master;
*/
master = isc_sockaddr_totext(&zone->masters[zone->curmaster],
zone->mctx);
if (master == NULL)
master = unknown;
if (devent->result != DNS_R_SUCCESS) {
dns_zone_logerror(zone, "refresh: failure for %s: %s",
master, dns_result_totext(devent->result));
goto next_master;
}
dns_resolver_getanswer(event, &msg);
/*
* Unexpected rcode.
*/
if (msg->rcode != dns_rcode_noerror) {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof rcode, ISC_BUFFERTYPE_TEXT);
dns_rcode_totext(msg->rcode, &rb);
dns_zone_logerror(zone,
"refresh: unexpected rcode (%.*s) from %s\n",
rb.used, rcode, master);
goto next_master;
}
/*
* if non-auth log and next master;
*/
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) {
dns_zone_logerror(zone,
"refresh: non-authorative answer from %s", master);
goto next_master;
}
/*
* There should not be a CNAME record at top of zone.
*/
cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname);
soacnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_soa);
if (cnamecnt != 0) {
dns_zone_logerror(zone,
"refresh: CNAME discovered: master %s", master);
goto next_master;
}
if (soacnt != 1) {
dns_zone_logerror(zone,
"refresh: SOA count (%d) != 1: master %s",
soacnt, master);
goto next_master;
}
nscount = message_count(msg, DNS_SECTION_AUTHORITY, dns_rdatatype_ns);
soacount = message_count(msg, DNS_SECTION_AUTHORITY, dns_rdatatype_soa);
/*
* if referral log and next master;
*/
if (soacnt == 0 && soacount == 0 && nscount != 0) {
dns_zone_logerror(zone,
"refresh: referral: master %s", master);
goto next_master;
}
/*
* if nodata log and next master;
*/
if (soacnt == 0 && nscount == 0) {
dns_zone_logerror(zone, "refresh: NODATA: master %s", master);
goto next_master;
}
/*
* Extract serial
*/
rdataset = NULL;
result = dns_message_findname(msg, DNS_SECTION_ANSWER, &zone->origin,
dns_rdatatype_soa, dns_rdatatype_none,
NULL, &rdataset);
if (result != DNS_R_SUCCESS) {
dns_zone_logerror(zone, "refresh: unable to get soa record");
goto next_master;
}
result = dns_rdataset_first(rdataset);
if (result != DNS_R_SUCCESS) {
dns_zone_logerror(zone, "refresh: dns_rdataset_first failed");
goto next_master;
}
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, zone->mctx);
if (result != DNS_R_SUCCESS) {
dns_zone_logerror(zone, "refresh: dns_rdata_tostruct failed");
goto next_master;
}
serial = soa.serial;
dns_rdata_freestruct(&soa);
if (!DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED) ||
isc_serial_gt(serial, zone->serial)) {
dns_zone_transfer_in(zone);
isc_event_free(&event);
dns_resolver_destroyfetch(zone->res, &zone->fetch);
} else if (isc_serial_eq(soa.serial, zone->serial)) {
dns_zone_uptodate(zone);
goto next_master;
} else {
goto next_master;
}
if (master != unknown)
isc_mem_put(zone->mctx, master, strlen(master) + 1);
return;
next_master:
LOCK(&zone->lock);
if (master != unknown)
isc_mem_put(zone->mctx, master, strlen(master) + 1);
isc_event_free(&event);
dns_resolver_destroyfetch(zone->res, &zone->fetch);
zone->curmaster++;
if (zone->curmaster >= zone->masterscnt) {
zone->flags &= ~DNS_ZONE_F_REFRESH;
if (isc_stdtime_get(&now) != ISC_R_SUCCESS)
return;
zone_settimer(zone, now);
UNLOCK(&zone->lock);
return;
}
UNLOCK(&zone->lock);
soa_query(zone, refresh_callback);
return;
#endif
}
#ifdef notyet
static void
soa_query(dns_zone_t *zone, isc_taskaction_t callback) {
dns_name_t *zonename;
dns_result_t result;
zonename = &zone->origin;
LOCK(&zone->lock);
result = dns_resolver_createfetch(zone->res, zonename,
dns_rdatatype_soa,
NULL, NULL, NULL,
DNS_FETCHOPT_UNSHARED,
zone->task, callback, zone,
&zone->fetch);
UNLOCK(&zone->lock);
if (result != DNS_R_SUCCESS)
cancel_refresh(zone);
}
#endif
static void
zone_shutdown(isc_task_t *task, isc_event_t *event) {
dns_zone_t *zone = (dns_zone_t *)event->arg;
isc_event_free(&event);
task = task; /* XXX */
zone = zone; /* XXX */
}
static void
zone_timer(isc_task_t *task, isc_event_t *event) {
dns_zone_t *zone = (dns_zone_t *)event->arg;
fprintf(stderr, "zone_timer\n");
dns_zone_maintenance(zone);
isc_event_free(&event);
task = task; /* XXX */
}
static dns_result_t
zone_settimer(dns_zone_t *zone, isc_stdtime_t now) {
isc_stdtime_t next = 0;
isc_time_t expires;
isc_interval_t interval;
isc_result_t iresult;
REQUIRE(DNS_ZONE_VALID(zone));
switch (zone->type) {
case dns_zone_master:
if (DNS_ZONE_FLAG(zone, DNS_ZONE_F_NEEDDUMP))
next = zone->dumptime;
if (DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED)) {
if (DNS_ZONE_OPTION(zone, DNS_ZONE_O_SERVERS) &&
(zone->servertime < next || next == 0))
next = zone->servertime;
if (DNS_ZONE_OPTION(zone, DNS_ZONE_O_PARENTS) &&
(zone->parenttime < next || next == 0))
next = zone->parenttime;
if (DNS_ZONE_OPTION(zone, DNS_ZONE_O_CHILDREN) &&
(zone->childtime < next || next == 0))
next = zone->childtime;
}
break;
case dns_zone_slave:
case dns_zone_stub:
if (!DNS_ZONE_FLAG(zone, DNS_ZONE_F_REFRESH))
next = zone->refreshtime;
if (DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED)) {
if (zone->expiretime < next || next == 0)
next = zone->expiretime;
if (DNS_ZONE_OPTION(zone, DNS_ZONE_O_SERVERS) &&
(zone->servertime < next || next == 0))
next = zone->servertime;
if (DNS_ZONE_OPTION(zone, DNS_ZONE_O_PARENTS) &&
(zone->parenttime < next || next == 0))
next = zone->parenttime;
if (DNS_ZONE_OPTION(zone, DNS_ZONE_O_CHILDREN) &&
(zone->childtime < next || next == 0))
next = zone->childtime;
}
break;
default:
break;
}
fprintf(stdout, "settimer %d %d = %d seconds\n",
next, now, next - now);
if (next == 0) {
if (zone->timer != NULL)
isc_timer_detach(&zone->timer);
} else {
isc_time_settoepoch(&expires);
if (next <= now)
isc_interval_set(&interval, 0, 1);
else
isc_interval_set(&interval, next - now, 0);
if (zone->timer != NULL) {
iresult = isc_timer_reset(zone->timer,
isc_timertype_once,
&expires, &interval,
ISC_TRUE);
} else {
iresult = isc_timer_create(zone->timgr,
isc_timertype_once,
&expires, &interval,
zone->task, zone_timer,
zone, &zone->timer);
}
if (iresult != ISC_R_SUCCESS) {
/* XXX */
return (DNS_R_UNEXPECTED);
}
}
return (DNS_R_SUCCESS);
}
void
cancel_refresh(dns_zone_t *zone) {
isc_stdtime_t now;
REQUIRE(DNS_ZONE_VALID(zone));
/* XXX MPA*/
LOCK(&zone->lock);
zone->flags &= ~DNS_ZONE_F_REFRESH;
UNLOCK(&zone->lock);
if (isc_stdtime_get(&now) != ISC_R_SUCCESS)
return;
if (!DNS_ZONE_FLAG(zone, DNS_ZONE_F_EXITING))
zone_settimer(zone, now);
}
static dns_result_t
dns_notify(dns_name_t *name, isc_sockaddr_t *addr, dns_rdatatype_t type,
dns_rdataclass_t rdclass, isc_sockaddr_t *source, isc_mem_t *mctx)
{
dns_message_t *msg = NULL;
dns_result_t result;
isc_buffer_t target;
/* dns_rdatalist_t *rdatalist = NULL; */
dns_rdatalist_t rdatalist;
dns_rdataset_t *rdataset = NULL;
char buf[512];
result = dns_message_create(mctx, DNS_MESSAGE_INTENTRENDER, &msg);
if (result != DNS_R_SUCCESS)
return (result);
msg->opcode = dns_opcode_notify;
msg->rdclass = rdclass;
msg->id = htons(3456); /* XXX */
/* result = dns_message_gettemprdatalist(msg, &rdatalist); */
ISC_LIST_INIT(rdatalist.rdata);
ISC_LINK_INIT(&rdatalist, link);
rdatalist.type = type;
rdatalist.rdclass = rdclass;
rdatalist.ttl = 0;
result = dns_message_gettemprdataset(msg, &rdataset);
if (result != DNS_R_SUCCESS)
goto cleanup;
dns_rdataset_init(rdataset);
dns_rdatalist_tordataset(&rdatalist, rdataset);
ISC_LIST_APPEND(name->list, rdataset, link);
dns_message_addname(msg, name, DNS_SECTION_QUESTION);
isc_buffer_init(&target, buf, sizeof buf, ISC_BUFFERTYPE_BINARY);
result = dns_message_renderbegin(msg, &target);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_message_rendersection(msg, DNS_SECTION_QUESTION, 0, 0);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_message_rendersection(msg, DNS_SECTION_ANSWER, 0, 0);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_message_rendersection(msg, DNS_SECTION_AUTHORITY, 0, 0);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_message_rendersection(msg, DNS_SECTION_ADDITIONAL, 0, 0);
if (result != DNS_R_SUCCESS)
goto cleanup;
/* XXX TSIG here */
result = dns_message_renderend(msg);
if (result != DNS_R_SUCCESS)
goto cleanup;
/* XXX Queue for sending */
addr = addr; /* XXX */
source = source; /* XXX */
cleanup:
dns_message_destroy(&msg);
return (result);
}
dns_result_t
dns_zone_notifyreceive(dns_zone_t *zone, isc_sockaddr_t *from,
dns_message_t *msg)
{
unsigned int i;
dns_rdata_soa_t soa;
dns_rdataset_t *rdataset = NULL;
dns_rdata_t rdata;
dns_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
/*
* If type != T_SOA return DNS_R_REFUSED. We don't yet support
* ROLLOVER.
*
* SOA: RFC 1996
* Check that 'from' is a valid notify source, (zone->masters).
* Return DNS_R_REFUSED if not.
*
* If the notify message contains a serial number check it
* against the zones serial and return if <= current serial
*
* If a refresh check is progress, if so just record the
* fact we received a NOTIFY and from where and return.
* We will perform a new refresh check when the current one
* completes. Return DNS_R_SUCCESS.
*
* Otherwise initiate a refresh check using 'from' as the
* first address to check. Return DNS_R_SUCCESS.
*/
/*
* We only handle NOTIFY (SOA) at the present.
*/
LOCK(&zone->lock);
if (msg->counts[DNS_SECTION_QUESTION] != 0 ||
dns_message_findname(msg, DNS_SECTION_QUESTION, &zone->origin,
dns_rdatatype_soa, dns_rdatatype_none,
NULL, NULL) != DNS_R_SUCCESS) {
UNLOCK(&zone->lock);
return (DNS_R_REFUSED);
}
for (i = 0; i < zone->masterscnt; i++)
if (isc_sockaddr_equal(from, &zone->masters[i]))
break;
if (i >= zone->masterscnt) {
UNLOCK(&zone->lock);
return (DNS_R_REFUSED);
}
/*
* If the zone is loaded and there are answers check the serial
* to see if we need to do a refresh. Do not worry about this
* check if we are a dialup zone as we use the notify request
* to trigger a refresh check.
*/
if (msg->counts[DNS_SECTION_ANSWER] > 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONE_F_LOADED) &&
!DNS_ZONE_OPTION(zone, DNS_ZONE_O_DIALUP)) {
result = dns_message_findname(msg, DNS_SECTION_ANSWER,
&zone->origin,
dns_rdatatype_soa,
dns_rdatatype_none, NULL,
&rdataset);
if (result == DNS_R_SUCCESS)
result = dns_rdataset_first(rdataset);
if (result == DNS_R_SUCCESS) {
isc_uint32_t serial = 0;
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, zone->mctx);
if (result == DNS_R_SUCCESS) {
serial = soa.serial;
dns_rdata_freestruct(&soa);
if (isc_serial_le(serial, zone->serial))
return (DNS_R_SUCCESS);
}
}
}
/*
* If we got this far and there was a refresh in progress just
* let it complete. Record where we got the notify from so we
* can perform a refresh check when the current one completes
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONE_F_REFRESH)) {
zone->flags |= DNS_ZONE_F_NEEDREFRESH;
zone->notifyfrom = *from;
UNLOCK(&zone->lock);
return (DNS_R_SUCCESS);
}
UNLOCK(&zone->lock);
dns_zone_refresh(zone);
return (DNS_R_SUCCESS);
}
/*
* Copy / translate zone configuration data to dns_zone_t.
*/
dns_result_t
dns_zone_copy(isc_log_t *lctx, dns_c_ctx_t *ctx, dns_c_zone_t *czone,
dns_zone_t *zone) {
isc_result_t iresult;
dns_result_t result;
isc_boolean_t boolean;
const char *filename = NULL;
const char *ixfr = NULL;
dns_c_ipmatchlist_t *acl = 0;
dns_c_severity_t severity;
dns_c_iplist_t *iplist = NULL;
dns_c_pubkey_t *pubkey = NULL;
isc_uint32_t i;
isc_sockaddr_t sockaddr;
isc_int32_t size;
isc_int32_t xfrtime;
in_port_t port;
const char *origin;
char *o;
isc_sockaddr_t sockaddr_any;
ctx = ctx; /* unused */
isc_sockaddr_fromin6(&sockaddr_any, &in6addr_any, 0);
dns_zone_setclass(zone, czone->zclass);
origin = NULL;
result = dns_c_zone_getname(lctx, czone, &origin);
if (result != DNS_R_SUCCESS)
return (result);
o = isc_mem_strdup(zone->mctx, origin);
if (o == NULL)
return (DNS_R_NOMEMORY);
result = dns_zone_setorigin(zone, o);
isc_mem_free(zone->mctx, o);
if (result != DNS_R_SUCCESS)
return (result);
/* XXX needs to be an zone option */
result = dns_zone_setdbtype(zone, "rbt");
if (result != DNS_R_SUCCESS)
return (result);
switch (czone->ztype) {
case dns_c_zone_master:
dns_zone_settype(zone, dns_zone_master);
iresult = dns_c_zone_getfile(lctx, czone, &filename);
if (iresult != ISC_R_SUCCESS)
return (iresult);
result = dns_zone_setdatabase(zone, filename);
if (result != DNS_R_SUCCESS)
return (iresult);
iresult = dns_c_zone_getchecknames(lctx, czone, &severity);
if (iresult == ISC_R_SUCCESS)
dns_zone_setchecknames(zone, severity);
else
dns_zone_setchecknames(zone, dns_c_severity_fail);
iresult = dns_c_zone_getallowupd(lctx, czone, &acl);
if (iresult == ISC_R_SUCCESS) {
dns_zone_setupdateacl(zone, acl);
dns_c_ipmatchlist_delete(lctx, &acl);
} else
dns_zone_clearupdateacl(zone);
iresult = dns_c_zone_getallowquery(lctx, czone, &acl);
if (iresult == ISC_R_SUCCESS) {
dns_zone_setqueryacl(zone, acl);
dns_c_ipmatchlist_delete(lctx, &acl);
} else
dns_zone_clearqueryacl(zone);
iresult = dns_c_zone_getallowtransfer(lctx, czone, &acl);
if (iresult == ISC_R_SUCCESS) {
dns_zone_setxfracl(zone, acl);
dns_c_ipmatchlist_delete(lctx, &acl);
} else
dns_zone_clearxfracl(zone);
iresult = dns_c_zone_getdialup(lctx, czone, &boolean);
if (iresult == ISC_R_SUCCESS)
dns_zone_setoption(zone, DNS_ZONE_O_DIALUP, boolean);
else
dns_zone_clearoption(zone, DNS_ZONE_O_DIALUP);
iresult = dns_c_zone_getnotify(lctx, czone, &boolean);
if (iresult == ISC_R_SUCCESS)
dns_zone_setoption(zone, DNS_ZONE_O_NOTIFY, boolean);
else
dns_zone_clearoption(zone, DNS_ZONE_O_NOTIFY);
iresult = dns_c_zone_getalsonotify(lctx, czone, &iplist);
if (iresult == ISC_R_SUCCESS) {
for (i = 0; i < iplist->nextidx; i++) {
result = dns_zone_addnotify(zone,
&iplist->ips[i]);
if (result != DNS_R_SUCCESS)
return (result);
}
} else
dns_zone_clearnotify(zone);
iresult = dns_c_zone_getixfrbase(lctx, czone, &ixfr);
if (iresult == ISC_R_SUCCESS) {
result = dns_zone_setixfrlog(zone, ixfr);
if (result != DNS_R_SUCCESS)
return (result);
zone->diff_on_reload = ISC_TRUE;
} else
zone->diff_on_reload = ISC_FALSE;
czone->u.mzone.ixfr_tmp; /*XXX*/
iresult = dns_c_zone_getmaxixfrlog(lctx, czone, &size);
if (iresult == ISC_R_SUCCESS)
dns_zone_setixfrlogsize(zone, size);
iresult = dns_c_zone_getmaintixfrbase(lctx, czone, &boolean);
if (result == ISC_R_SUCCESS)
zone->diff_on_reload = boolean;
else
zone->diff_on_reload = ISC_TRUE;
iresult = dns_c_zone_getpubkey(lctx, czone, &pubkey);
if (iresult == ISC_R_SUCCESS)
dns_zone_setpubkey(zone, pubkey);
else
dns_zone_setpubkey(zone, NULL);
break;
case dns_c_zone_forward:
#ifdef notyet
/*
* forward zones are still in a state of flux
*/
czone->u.fzone.check_names; /* XXX unused in BIND 8 */
czone->u.fzone.forward; /* XXX*/
czone->u.fzone.forwarders; /* XXX*/
#endif
break;
case dns_c_zone_slave:
dns_zone_settype(zone, dns_zone_slave);
iresult = dns_c_zone_getfile(lctx, czone, &filename);
if (iresult != ISC_R_SUCCESS)
return (iresult);
result = dns_zone_setdatabase(zone, filename);
if (result != DNS_R_SUCCESS)
return (iresult);
iresult = dns_c_zone_getchecknames(lctx, czone, &severity);
if (iresult == ISC_R_SUCCESS)
dns_zone_setchecknames(zone, severity);
else
dns_zone_setchecknames(zone, dns_c_severity_warn);
iresult = dns_c_zone_getallowquery(lctx, czone, &acl);
if (iresult == ISC_R_SUCCESS) {
dns_zone_setqueryacl(zone, acl);
dns_c_ipmatchlist_delete(lctx, &acl);
} else
dns_zone_clearqueryacl(zone);
iresult = dns_c_zone_getpubkey(lctx, czone, &pubkey);
if (iresult == ISC_R_SUCCESS)
dns_zone_setpubkey(zone, pubkey);
else
dns_zone_setpubkey(zone, NULL);
iresult = dns_c_zone_getmasterport(lctx, czone, &port);
if (iresult != ISC_R_SUCCESS)
port = 53;
dns_zone_setmasterport(zone, port);
iresult = dns_c_zone_getmasterips(lctx, czone, &iplist);
if (iresult == ISC_R_SUCCESS) {
for (i = 0; i < iplist->nextidx; i++) {
result = dns_zone_addmaster(zone,
&iplist->ips[i]);
if (result != DNS_R_SUCCESS)
return (result);
}
} else
dns_zone_clearmasters(zone);
iresult = dns_c_zone_getmaintixfrbase(lctx, czone, &boolean);
if (result == ISC_R_SUCCESS)
zone->diff_on_reload = boolean;
else
zone->diff_on_reload = ISC_FALSE;
iresult = dns_c_zone_getmaxtranstimein(lctx, czone, &xfrtime);
if (result == ISC_R_SUCCESS)
zone->xfrtime = xfrtime;
else
zone->xfrtime = MAX_XFER_TIME;
iresult = dns_c_zone_gettransfersource(lctx, czone, &sockaddr);
if (iresult == ISC_R_SUCCESS)
zone->xfrsource = sockaddr;
else
zone->xfrsource = sockaddr_any;
break;
case dns_c_zone_stub:
dns_zone_settype(zone, dns_zone_stub);
iresult = dns_c_zone_getfile(lctx, czone, &filename);
if (iresult != ISC_R_SUCCESS)
return (iresult);
result = dns_zone_setdatabase(zone, filename);
if (result != DNS_R_SUCCESS)
return (iresult);
iresult = dns_c_zone_getchecknames(lctx, czone, &severity);
if (iresult == ISC_R_SUCCESS)
dns_zone_setchecknames(zone, severity);
else
dns_zone_setchecknames(zone, dns_c_severity_warn);
iresult = dns_c_zone_getallowquery(lctx, czone, &acl);
if (iresult == ISC_R_SUCCESS) {
dns_zone_setqueryacl(zone, acl);
dns_c_ipmatchlist_delete(lctx, &acl);
} else
dns_zone_clearqueryacl(zone);
iresult = dns_c_zone_getpubkey(lctx, czone, &pubkey);
if (iresult == ISC_R_SUCCESS)
dns_zone_setpubkey(zone, pubkey);
else
dns_zone_setpubkey(zone, NULL);
iresult = dns_c_zone_getmasterport(lctx, czone, &port);
if (iresult != ISC_R_SUCCESS)
port = 53;
dns_zone_setmasterport(zone, port);
iresult = dns_c_zone_getmasterips(lctx, czone, &iplist);
if (iresult == ISC_R_SUCCESS) {
for (i = 0; i < iplist->nextidx; i++) {
result = dns_zone_addmaster(zone,
&iplist->ips[i]);
if (result != DNS_R_SUCCESS)
return (result);
}
} else
dns_zone_clearmasters(zone);
iresult = dns_c_zone_getmaxtranstimein(lctx, czone, &xfrtime);
if (result == ISC_R_SUCCESS)
zone->xfrtime = xfrtime;
else
zone->xfrtime = MAX_XFER_TIME;
iresult = dns_c_zone_gettransfersource(lctx, czone, &sockaddr);
if (iresult == ISC_R_SUCCESS)
zone->xfrsource = sockaddr;
else
zone->xfrsource = sockaddr_any;
break;
case dns_c_zone_hint:
dns_zone_settype(zone, dns_zone_hint);
iresult = dns_c_zone_getfile(lctx, czone, &filename);
if (iresult != ISC_R_SUCCESS)
return (iresult);
result = dns_zone_setdatabase(zone, filename);
if (result != DNS_R_SUCCESS)
return (result);
iresult = dns_c_zone_getchecknames(lctx, czone, &severity);
if (iresult == ISC_R_SUCCESS)
dns_zone_setchecknames(zone, severity);
else
dns_zone_setchecknames(zone, dns_c_severity_fail);
iresult = dns_c_zone_getpubkey(lctx, czone, &pubkey);
if (iresult == ISC_R_SUCCESS)
dns_zone_setpubkey(zone, pubkey);
else
dns_zone_setpubkey(zone, NULL);
break;
}
return (DNS_R_SUCCESS);
}
void
dns_zone_setqueryacl(dns_zone_t *zone, dns_c_ipmatchlist_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->query_acl != NULL)
dns_c_ipmatchlist_delete(NULL /* isc_log_t */,
&zone->query_acl);
zone->query_acl = dns_c_ipmatchlist_attach(NULL /* isc_log_t */,
acl);
UNLOCK(&zone->lock);
}
void
dns_zone_setupdateacl(dns_zone_t *zone, dns_c_ipmatchlist_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->update_acl != NULL)
dns_c_ipmatchlist_delete(NULL /* isc_log_t */,
&zone->update_acl);
zone->update_acl = dns_c_ipmatchlist_attach(NULL /* isc_log_t */,
acl);
UNLOCK(&zone->lock);
}
void
dns_zone_setxfracl(dns_zone_t *zone, dns_c_ipmatchlist_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->xfr_acl != NULL)
dns_c_ipmatchlist_delete(NULL /* isc_log_t */,
&zone->xfr_acl);
zone->xfr_acl = dns_c_ipmatchlist_attach(NULL /* isc_log_t */,
acl);
UNLOCK(&zone->lock);
}
dns_c_ipmatchlist_t *
dns_zone_getqueryacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->query_acl);
}
dns_c_ipmatchlist_t *
dns_zone_getupdateacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->update_acl);
}
dns_c_ipmatchlist_t *
dns_zone_getxfracl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->xfr_acl);
}
void
dns_zone_clearupdateacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->update_acl != NULL)
dns_c_ipmatchlist_delete(NULL /* isc_log_t */,
&zone->update_acl);
UNLOCK(&zone->lock);
}
void
dns_zone_clearqueryacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->query_acl != NULL)
dns_c_ipmatchlist_delete(NULL /* isc_log_t */,
&zone->query_acl);
UNLOCK(&zone->lock);
}
void
dns_zone_clearxfracl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->xfr_acl != NULL)
dns_c_ipmatchlist_delete(NULL /* isc_log_t */,
&zone->xfr_acl);
UNLOCK(&zone->lock);
}
void
dns_zone_setchecknames(dns_zone_t *zone, dns_c_severity_t severity) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->check_names = severity;
}
dns_c_severity_t
dns_zone_getchecknames(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->check_names);
}
void
dns_zone_setpubkey(dns_zone_t *zone, dns_c_pubkey_t *pubkey) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->pubkey = pubkey; /* XXX should be an attach */
}
dns_c_pubkey_t *
dns_zone_getpubkey(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->pubkey);
}
void
dns_zone_setixfrlogsize(dns_zone_t *zone, isc_int32_t size) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->ixfrlogsize = size;
}
isc_int32_t
dns_zone_getixfrlogsize(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->ixfrlogsize);
}
void
dns_zone_setmasterport(dns_zone_t *zone, in_port_t port) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->masterport = port;
}
in_port_t
dns_zone_getmasterport(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->masterport);
}
static void
dns_zone_logerror(dns_zone_t *zone, const char *fmt, ...) {
va_list ap;
char message[4096];
char namebuf[1024];
isc_buffer_t buffer;
int len;
dns_result_t result;
isc_buffer_init(&buffer, namebuf, sizeof namebuf, ISC_BUFFERTYPE_TEXT);
result = dns_name_totext(&zone->origin, ISC_TRUE, &buffer);
if (result == DNS_R_SUCCESS)
len = buffer.used;
else
len = 0;
va_start(ap, fmt);
vsnprintf(message, sizeof message, fmt, ap);
va_end(ap);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_ERROR,
"zone %.*s: %s", len, namebuf, message);
}
static int
message_count(dns_message_t *msg, dns_section_t section, dns_rdatatype_t type) {
dns_result_t result;
dns_name_t *name;
dns_rdataset_t *curr;
int res = 0;
result = dns_message_firstname(msg, section);
while (result == DNS_R_SUCCESS) {
name = NULL;
dns_message_currentname(msg, section, &name);
for (curr = ISC_LIST_TAIL(name->list); curr != NULL;
curr = ISC_LIST_PREV(curr, link)) {
if (curr->type == type)
res++;
}
result = dns_message_nextname(msg, section);
}
return (res);
}
void
dns_zone_setresolver(dns_zone_t *zone, dns_resolver_t *resolver) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->res != NULL)
dns_resolver_detach(&zone->res);
dns_resolver_attach(resolver, &zone->res);
UNLOCK(&zone->lock);
}
void
dns_zone_setxfrtime(dns_zone_t *zone, isc_uint32_t xfrtime) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(xfrtime != 0);
zone->xfrtime = xfrtime;
}
isc_uint32_t
dns_zone_getxfrtime(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->xfrtime);
}
void
dns_zone_transfer_in(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
fprintf(stdout, "dns_zone_transfer_in\n");
}
dns_zonetype_t dns_zone_gettype(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->type);
}
dns_name_t *
dns_zone_getorigin(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->origin);
}
void
dns_zone_settask(dns_zone_t *zone, isc_task_t *task) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
if (zone->task != NULL)
isc_task_detach(&zone->task);
isc_task_attach(task, &zone->task);
UNLOCK(&zone->lock);
}
isc_task_t *
dns_zone_gettask(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->task); /* attach? */
}
const char *
dns_zone_getdatabase(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->database);
}
const char *
dns_zone_getixfrlog(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->ixfrlog);
}
#if 0
/*
* XXX should become isc_sockaddr_fromaddr() once dns_c_addr_t -> isc
*/
static void
sockaddr_fromaddr(isc_sockaddr_t *sockaddr, dns_c_addr_t *a,
in_port_t port) {
switch (a->type.sa.sa_family) {
case AF_INET:
isc_sockaddr_fromin(sockaddr, &a->type.sin.sin_addr, port);
break;
case AF_INET6:
isc_sockaddr_fromin6(sockaddr, &a->type.sin6.sin6_addr, port);
break;
default:
INSIST(0);
}
}
#endif
static void
record_serial() {
}
isc_boolean_t
dns_zone_equal(dns_zone_t *oldzone, dns_zone_t *newzone) {
unsigned int i;
REQUIRE(DNS_ZONE_VALID(oldzone));
REQUIRE(DNS_ZONE_VALID(newzone));
LOCK(&oldzone->lock);
LOCK(&newzone->lock);
if (oldzone->type != newzone->type ||
oldzone->xfrtime != newzone->xfrtime ||
oldzone->rdclass != newzone->rdclass ||
oldzone->db_argc != newzone->db_argc ||
oldzone->notifycnt != newzone->notifycnt ||
oldzone->masterscnt != newzone->masterscnt ||
oldzone->masterport != newzone->masterport ||
oldzone->check_names != newzone->check_names ||
oldzone->diff_on_reload != newzone->diff_on_reload ||
oldzone->ixfrlogsize != newzone->ixfrlogsize)
goto false;
if (!dns_name_equal(&oldzone->origin, &newzone->origin))
goto false;
if ((oldzone->updatelog == NULL && newzone->updatelog != NULL) ||
(oldzone->updatelog != NULL && newzone->updatelog == NULL) ||
(oldzone->updatelog != NULL &&
strcmp(oldzone->updatelog, newzone->updatelog) != 0))
goto false;
if ((oldzone->journal == NULL && newzone->journal != NULL) ||
(oldzone->journal != NULL && newzone->journal == NULL) ||
(oldzone->journal != NULL &&
strcmp(oldzone->journal, newzone->journal) != 0))
goto false;
if ((oldzone->ixfrlog == NULL && newzone->ixfrlog != NULL) ||
(oldzone->ixfrlog != NULL && newzone->ixfrlog == NULL) ||
(oldzone->ixfrlog != NULL &&
strcmp(oldzone->ixfrlog, newzone->ixfrlog) != 0))
goto false;
if ((oldzone->options & oldzone->setoptions) !=
(newzone->options & newzone->setoptions))
goto false;
if ((oldzone->db_type == NULL && newzone->db_type != NULL) ||
(oldzone->db_type != NULL && newzone->db_type == NULL) ||
(oldzone->db_type != NULL &&
strcmp(oldzone->db_type, newzone->db_type) != 0))
goto false;
for (i = 0; i < oldzone->db_argc; i++)
if (strcmp(oldzone->db_argv[i], newzone->db_argv[i]) != 0)
goto false;
if (!isc_sockaddr_equal(&oldzone->xfrsource, &newzone->xfrsource))
goto false;
for (i = 0; i < oldzone->notifycnt; i++)
if (!isc_sockaddr_equal(&oldzone->notify[i],
&newzone->notify[i]))
goto false;
for (i = 0; i < oldzone->masterscnt; i++)
if (!isc_sockaddr_equal(&oldzone->masters[i],
&newzone->masters[i]))
goto false;
if (!dns_c_ipmatchlist_equal(oldzone->update_acl, newzone->update_acl))
goto false;
if (!dns_c_ipmatchlist_equal(oldzone->query_acl, newzone->query_acl))
goto false;
if (!dns_c_ipmatchlist_equal(oldzone->xfr_acl, newzone->xfr_acl))
goto false;
if (!dns_c_pubkey_equal(oldzone->pubkey, newzone->pubkey))
goto false;
UNLOCK(&newzone->lock);
UNLOCK(&oldzone->lock);
return(ISC_TRUE); /* XXX should be ISC_TRUE once acl/pubkey
checks are done. */
false:
UNLOCK(&newzone->lock);
UNLOCK(&oldzone->lock);
return (ISC_FALSE);
}
dns_result_t
dns_zone_replacedb(dns_zone_t *zone, dns_db_t *db, isc_boolean_t dump) {
dns_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK(&zone->lock);
result = replacedb(zone, db, dump);
UNLOCK(&zone->lock);
return (result);
}
static dns_result_t
replacedb(dns_zone_t *zone, dns_db_t *db, isc_boolean_t dump) {
dns_dbversion_t *ver;
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
ver = NULL;
dns_db_currentversion(db, &ver);
/*
* The initial version of a slave zone is always dumped;
* subsequent versions may be journalled instead if this
* is enabled in the configuration.
*/
if (zone->top != NULL && zone->ixfrlog != NULL &&
zone->diff_on_reload) {
printf("generating diffs\n");
result = dns_db_diff(zone->mctx,
db, ver,
zone->top, NULL /* XXX */,
zone->ixfrlog);
if (result != DNS_R_SUCCESS)
goto fail;
} else {
if (dump) {
printf("dumping new version\n");
/* XXX should use temporary file and rename */
result = dns_db_dump(db, ver, zone->database);
if (result != DNS_R_SUCCESS)
goto fail;
}
if (zone->ixfrlog != NULL) {
/* XXXRTH log instead: printf("unlinking journal\n"); */
(void) remove(zone->ixfrlog);
}
}
dns_db_closeversion(db, &ver, ISC_FALSE);
#if 0
printf("replacing database...\n");
#endif
if (zone->top != NULL)
dns_db_detach(&zone->top);
dns_db_attach(db, &zone->top);
zone->flags |= DNS_ZONE_F_LOADED;
return (DNS_R_SUCCESS);
fail:
dns_db_closeversion(db, &ver, ISC_FALSE);
return (result);
}
Reference in New Issue View Git Blame Copy Permalink