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545a3fe08994e4afaad745f96c286d6a429a0177
bind9/bin/named/zoneconf.c
T
Aram Sargsyan 1d736cf451 Fix an interfacemgr use-after-free error in zoneconf.c:isself() 
The 'named_g_server->interfacemgr' pointer is saved in the zone
structure using dns_zone_setisself(), as a void* argument to be
passed to the isself() callback, so there is no attach/detach,
and when shutting down, the interface manager can be destroyed
by the shutdown_server(), running in exclusive mode, and causing
isself() to crash when trying to use the pointer.

Instead of keeping the interface manager pointer in the zone
structure, just check and use the 'named_g_server->interfacemgr'
itself, as it was implemented originally in the
3aca8e5bf3 commit. Later, in the
8eb88aafee commit, the code was
changed to pass the interface manager pointer using the additional
void* argument, but the commit message doesn't mention if there
was any practical reason for that.

Additionally, don't pass the interfacemgr pointer to the
ns_interfacemgr_getaclenv() function before it is checked
against NULL.

(cherry picked from commit 64d69e4adc)
2023-05-25 08:39:20 +00:00

2115 lines
58 KiB
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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <inttypes.h>
#include <stdbool.h>
#include <isc/buffer.h>
#include <isc/file.h>
#include <isc/mem.h>
#include <isc/print.h>
#include <isc/result.h>
#include <isc/stats.h>
#include <isc/string.h> /* Required for HP/UX (and others?) */
#include <isc/util.h>
#include <dns/acl.h>
#include <dns/db.h>
#include <dns/fixedname.h>
#include <dns/ipkeylist.h>
#include <dns/journal.h>
#include <dns/kasp.h>
#include <dns/log.h>
#include <dns/masterdump.h>
#include <dns/name.h>
#include <dns/nsec3.h>
#include <dns/rdata.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatatype.h>
#include <dns/sdlz.h>
#include <dns/ssu.h>
#include <dns/stats.h>
#include <dns/tsig.h>
#include <dns/view.h>
#include <dns/zone.h>
#include <ns/client.h>
#include <named/config.h>
#include <named/globals.h>
#include <named/log.h>
#include <named/server.h>
#include <named/zoneconf.h>
/* ACLs associated with zone */
typedef enum {
allow_notify,
allow_query,
allow_query_on,
allow_transfer,
allow_update,
allow_update_forwarding
} acl_type_t;
#define RETERR(x) \
do { \
isc_result_t _r = (x); \
if (_r != ISC_R_SUCCESS) \
return ((_r)); \
} while (0)
#define CHECK(x) \
do { \
result = (x); \
if (result != ISC_R_SUCCESS) \
goto cleanup; \
} while (0)
/*%
* Convenience function for configuring a single zone ACL.
*/
static isc_result_t
configure_zone_acl(const cfg_obj_t *zconfig, const cfg_obj_t *vconfig,
const cfg_obj_t *config, acl_type_t acltype,
cfg_aclconfctx_t *actx, dns_zone_t *zone,
void (*setzacl)(dns_zone_t *, dns_acl_t *),
void (*clearzacl)(dns_zone_t *)) {
isc_result_t result;
const cfg_obj_t *maps[5] = { NULL, NULL, NULL, NULL, NULL };
const cfg_obj_t *aclobj = NULL;
int i = 0;
dns_acl_t **aclp = NULL, *acl = NULL;
const char *aclname;
dns_view_t *view;
view = dns_zone_getview(zone);
switch (acltype) {
case allow_notify:
if (view != NULL) {
aclp = &view->notifyacl;
}
aclname = "allow-notify";
break;
case allow_query:
if (view != NULL) {
aclp = &view->queryacl;
}
aclname = "allow-query";
break;
case allow_query_on:
if (view != NULL) {
aclp = &view->queryonacl;
}
aclname = "allow-query-on";
break;
case allow_transfer:
if (view != NULL) {
aclp = &view->transferacl;
}
aclname = "allow-transfer";
break;
case allow_update:
if (view != NULL) {
aclp = &view->updateacl;
}
aclname = "allow-update";
break;
case allow_update_forwarding:
if (view != NULL) {
aclp = &view->upfwdacl;
}
aclname = "allow-update-forwarding";
break;
default:
UNREACHABLE();
}
/* First check to see if ACL is defined within the zone */
if (zconfig != NULL) {
maps[0] = cfg_tuple_get(zconfig, "options");
(void)named_config_get(maps, aclname, &aclobj);
if (aclobj != NULL) {
aclp = NULL;
goto parse_acl;
}
}
/* Failing that, see if there's a default ACL already in the view */
if (aclp != NULL && *aclp != NULL) {
(*setzacl)(zone, *aclp);
return (ISC_R_SUCCESS);
}
/* Check for default ACLs that haven't been parsed yet */
if (vconfig != NULL) {
const cfg_obj_t *options = cfg_tuple_get(vconfig, "options");
if (options != NULL) {
maps[i++] = options;
}
}
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
(void)named_config_get(maps, aclname, &aclobj);
if (aclobj == NULL) {
(*clearzacl)(zone);
return (ISC_R_SUCCESS);
}
parse_acl:
result = cfg_acl_fromconfig(aclobj, config, named_g_lctx, actx,
named_g_mctx, 0, &acl);
if (result != ISC_R_SUCCESS) {
return (result);
}
(*setzacl)(zone, acl);
/* Set the view default now */
if (aclp != NULL) {
dns_acl_attach(acl, aclp);
}
dns_acl_detach(&acl);
return (ISC_R_SUCCESS);
}
/*%
* Parse the zone update-policy statement.
*/
static isc_result_t
configure_zone_ssutable(const cfg_obj_t *zconfig, dns_zone_t *zone,
const char *zname) {
const cfg_obj_t *updatepolicy = NULL;
const cfg_listelt_t *element, *element2;
dns_ssutable_t *table = NULL;
isc_mem_t *mctx = dns_zone_getmctx(zone);
bool autoddns = false;
isc_result_t result = ISC_R_SUCCESS;
(void)cfg_map_get(zconfig, "update-policy", &updatepolicy);
if (updatepolicy == NULL) {
dns_zone_setssutable(zone, NULL);
return (ISC_R_SUCCESS);
}
if (cfg_obj_isstring(updatepolicy) &&
strcmp("local", cfg_obj_asstring(updatepolicy)) == 0)
{
autoddns = true;
updatepolicy = NULL;
}
dns_ssutable_create(mctx, &table);
for (element = cfg_list_first(updatepolicy); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *stmt = cfg_listelt_value(element);
const cfg_obj_t *mode = cfg_tuple_get(stmt, "mode");
const cfg_obj_t *identity = cfg_tuple_get(stmt, "identity");
const cfg_obj_t *matchtype = cfg_tuple_get(stmt, "matchtype");
const cfg_obj_t *dname = cfg_tuple_get(stmt, "name");
const cfg_obj_t *typelist = cfg_tuple_get(stmt, "types");
const char *str;
bool grant = false;
bool usezone = false;
dns_ssumatchtype_t mtype = dns_ssumatchtype_name;
dns_fixedname_t fname, fident;
isc_buffer_t b;
dns_ssuruletype_t *types;
unsigned int i, n;
str = cfg_obj_asstring(mode);
if (strcasecmp(str, "grant") == 0) {
grant = true;
} else if (strcasecmp(str, "deny") == 0) {
grant = false;
} else {
UNREACHABLE();
}
str = cfg_obj_asstring(matchtype);
CHECK(dns_ssu_mtypefromstring(str, &mtype));
if (mtype == dns_ssumatchtype_subdomain &&
strcasecmp(str, "zonesub") == 0)
{
usezone = true;
}
dns_fixedname_init(&fident);
str = cfg_obj_asstring(identity);
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
result = dns_name_fromtext(dns_fixedname_name(&fident), &b,
dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(identity, named_g_lctx, ISC_LOG_ERROR,
"'%s' is not a valid name", str);
goto cleanup;
}
dns_fixedname_init(&fname);
if (usezone) {
dns_name_copy(dns_zone_getorigin(zone),
dns_fixedname_name(&fname));
} else {
str = cfg_obj_asstring(dname);
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
result = dns_name_fromtext(dns_fixedname_name(&fname),
&b, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(identity, named_g_lctx,
ISC_LOG_ERROR,
"'%s' is not a valid name", str);
goto cleanup;
}
}
n = named_config_listcount(typelist);
if (n == 0) {
types = NULL;
} else {
types = isc_mem_get(mctx, n * sizeof(*types));
}
i = 0;
for (element2 = cfg_list_first(typelist); element2 != NULL;
element2 = cfg_list_next(element2))
{
const cfg_obj_t *typeobj;
const char *bracket;
isc_textregion_t r;
unsigned long max = 0;
INSIST(i < n);
typeobj = cfg_listelt_value(element2);
str = cfg_obj_asstring(typeobj);
DE_CONST(str, r.base);
bracket = strchr(str, '(' /*)*/);
if (bracket != NULL) {
char *end = NULL;
r.length = bracket - str;
max = strtoul(bracket + 1, &end, 10);
if (max > 0xffff || end[0] != /*(*/ ')' ||
end[1] != 0)
{
cfg_obj_log(identity, named_g_lctx,
ISC_LOG_ERROR,
"'%s' is not a valid count",
bracket);
isc_mem_put(mctx, types,
n * sizeof(*types));
goto cleanup;
}
} else {
r.length = strlen(str);
}
types[i].max = max;
result = dns_rdatatype_fromtext(&types[i++].type, &r);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(identity, named_g_lctx,
ISC_LOG_ERROR,
"'%.*s' is not a valid type",
(int)r.length, str);
isc_mem_put(mctx, types, n * sizeof(*types));
goto cleanup;
}
}
INSIST(i == n);
dns_ssutable_addrule(table, grant, dns_fixedname_name(&fident),
mtype, dns_fixedname_name(&fname), n,
types);
if (types != NULL) {
isc_mem_put(mctx, types, n * sizeof(*types));
}
}
/*
* If "update-policy local;" and a session key exists,
* then use the default policy, which is equivalent to:
* update-policy { grant <session-keyname> zonesub any; };
*/
if (autoddns) {
dns_ssuruletype_t any = { dns_rdatatype_any, 0 };
if (named_g_server->session_keyname == NULL) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"failed to enable auto DDNS policy "
"for zone %s: session key not found",
zname);
result = ISC_R_NOTFOUND;
goto cleanup;
}
dns_ssutable_addrule(table, true,
named_g_server->session_keyname,
dns_ssumatchtype_local,
dns_zone_getorigin(zone), 1, &any);
}
dns_zone_setssutable(zone, table);
cleanup:
dns_ssutable_detach(&table);
return (result);
}
/*
* This is the TTL used for internally generated RRsets for static-stub zones.
* The value doesn't matter because the mapping is static, but needs to be
* defined for the sake of implementation.
*/
#define STATICSTUB_SERVER_TTL 86400
/*%
* Configure an apex NS with glues for a static-stub zone.
* For example, for the zone named "example.com", the following RRs will be
* added to the zone DB:
* example.com. NS example.com.
* example.com. A 192.0.2.1
* example.com. AAAA 2001:db8::1
*/
static isc_result_t
configure_staticstub_serveraddrs(const cfg_obj_t *zconfig, dns_zone_t *zone,
dns_rdatalist_t *rdatalist_ns,
dns_rdatalist_t *rdatalist_a,
dns_rdatalist_t *rdatalist_aaaa) {
const cfg_listelt_t *element;
isc_mem_t *mctx = dns_zone_getmctx(zone);
isc_region_t region, sregion;
dns_rdata_t *rdata;
isc_result_t result = ISC_R_SUCCESS;
for (element = cfg_list_first(zconfig); element != NULL;
element = cfg_list_next(element))
{
const isc_sockaddr_t *sa;
isc_netaddr_t na;
const cfg_obj_t *address = cfg_listelt_value(element);
dns_rdatalist_t *rdatalist;
sa = cfg_obj_assockaddr(address);
if (isc_sockaddr_getport(sa) != 0) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"port is not configurable for "
"static stub server-addresses");
return (ISC_R_FAILURE);
}
isc_netaddr_fromsockaddr(&na, sa);
if (isc_netaddr_getzone(&na) != 0) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"scoped address is not allowed "
"for static stub "
"server-addresses");
return (ISC_R_FAILURE);
}
switch (na.family) {
case AF_INET:
region.length = sizeof(na.type.in);
rdatalist = rdatalist_a;
break;
default:
INSIST(na.family == AF_INET6);
region.length = sizeof(na.type.in6);
rdatalist = rdatalist_aaaa;
break;
}
rdata = isc_mem_get(mctx, sizeof(*rdata) + region.length);
region.base = (unsigned char *)(rdata + 1);
memmove(region.base, &na.type, region.length);
dns_rdata_init(rdata);
dns_rdata_fromregion(rdata, dns_zone_getclass(zone),
rdatalist->type, &region);
ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
}
/*
* If no address is specified (unlikely in this context, but possible),
* there's nothing to do anymore.
*/
if (ISC_LIST_EMPTY(rdatalist_a->rdata) &&
ISC_LIST_EMPTY(rdatalist_aaaa->rdata))
{
return (ISC_R_SUCCESS);
}
/* Add to the list an apex NS with the ns name being the origin name */
dns_name_toregion(dns_zone_getorigin(zone), &sregion);
rdata = isc_mem_get(mctx, sizeof(*rdata) + sregion.length);
region.length = sregion.length;
region.base = (unsigned char *)(rdata + 1);
memmove(region.base, sregion.base, region.length);
dns_rdata_init(rdata);
dns_rdata_fromregion(rdata, dns_zone_getclass(zone), dns_rdatatype_ns,
&region);
ISC_LIST_APPEND(rdatalist_ns->rdata, rdata, link);
return (result);
}
/*%
* Configure an apex NS with an out-of-zone NS names for a static-stub zone.
* For example, for the zone named "example.com", something like the following
* RRs will be added to the zone DB:
* example.com. NS ns.example.net.
*/
static isc_result_t
configure_staticstub_servernames(const cfg_obj_t *zconfig, dns_zone_t *zone,
dns_rdatalist_t *rdatalist,
const char *zname) {
const cfg_listelt_t *element;
isc_mem_t *mctx = dns_zone_getmctx(zone);
dns_rdata_t *rdata;
isc_region_t sregion, region;
isc_result_t result = ISC_R_SUCCESS;
for (element = cfg_list_first(zconfig); element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *obj;
const char *str;
dns_fixedname_t fixed_name;
dns_name_t *nsname;
isc_buffer_t b;
obj = cfg_listelt_value(element);
str = cfg_obj_asstring(obj);
nsname = dns_fixedname_initname(&fixed_name);
isc_buffer_constinit(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
result = dns_name_fromtext(nsname, &b, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"server-name '%s' is not a valid "
"name",
str);
return (result);
}
if (dns_name_issubdomain(nsname, dns_zone_getorigin(zone))) {
cfg_obj_log(zconfig, named_g_lctx, ISC_LOG_ERROR,
"server-name '%s' must not be a "
"subdomain of zone name '%s'",
str, zname);
return (ISC_R_FAILURE);
}
dns_name_toregion(nsname, &sregion);
rdata = isc_mem_get(mctx, sizeof(*rdata) + sregion.length);
region.length = sregion.length;
region.base = (unsigned char *)(rdata + 1);
memmove(region.base, sregion.base, region.length);
dns_rdata_init(rdata);
dns_rdata_fromregion(rdata, dns_zone_getclass(zone),
dns_rdatatype_ns, &region);
ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
}
return (result);
}
/*%
* Configure static-stub zone.
*/
static isc_result_t
configure_staticstub(const cfg_obj_t *zconfig, dns_zone_t *zone,
const char *zname, const char *dbtype) {
int i = 0;
const cfg_obj_t *obj;
isc_mem_t *mctx = dns_zone_getmctx(zone);
dns_db_t *db = NULL;
dns_dbversion_t *dbversion = NULL;
dns_dbnode_t *apexnode = NULL;
dns_name_t apexname;
isc_result_t result;
dns_rdataset_t rdataset;
dns_rdatalist_t rdatalist_ns, rdatalist_a, rdatalist_aaaa;
dns_rdatalist_t *rdatalists[] = { &rdatalist_ns, &rdatalist_a,
&rdatalist_aaaa, NULL };
dns_rdata_t *rdata;
isc_region_t region;
/* Create the DB beforehand */
RETERR(dns_db_create(mctx, dbtype, dns_zone_getorigin(zone),
dns_dbtype_stub, dns_zone_getclass(zone), 0, NULL,
&db));
dns_rdataset_init(&rdataset);
dns_rdatalist_init(&rdatalist_ns);
rdatalist_ns.rdclass = dns_zone_getclass(zone);
rdatalist_ns.type = dns_rdatatype_ns;
rdatalist_ns.ttl = STATICSTUB_SERVER_TTL;
dns_rdatalist_init(&rdatalist_a);
rdatalist_a.rdclass = dns_zone_getclass(zone);
rdatalist_a.type = dns_rdatatype_a;
rdatalist_a.ttl = STATICSTUB_SERVER_TTL;
dns_rdatalist_init(&rdatalist_aaaa);
rdatalist_aaaa.rdclass = dns_zone_getclass(zone);
rdatalist_aaaa.type = dns_rdatatype_aaaa;
rdatalist_aaaa.ttl = STATICSTUB_SERVER_TTL;
/* Prepare zone RRs from the configuration */
obj = NULL;
result = cfg_map_get(zconfig, "server-addresses", &obj);
if (result == ISC_R_SUCCESS) {
INSIST(obj != NULL);
CHECK(configure_staticstub_serveraddrs(obj, zone, &rdatalist_ns,
&rdatalist_a,
&rdatalist_aaaa));
}
obj = NULL;
result = cfg_map_get(zconfig, "server-names", &obj);
if (result == ISC_R_SUCCESS) {
INSIST(obj != NULL);
CHECK(configure_staticstub_servernames(obj, zone, &rdatalist_ns,
zname));
}
/*
* Sanity check: there should be at least one NS RR at the zone apex
* to trigger delegation.
*/
if (ISC_LIST_EMPTY(rdatalist_ns.rdata)) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"No NS record is configured for a "
"static-stub zone '%s'",
zname);
result = ISC_R_FAILURE;
goto cleanup;
}
/*
* Now add NS and glue A/AAAA RRsets to the zone DB.
* First open a new version for the add operation and get a pointer
* to the apex node (all RRs are of the apex name).
*/
CHECK(dns_db_newversion(db, &dbversion));
dns_name_init(&apexname, NULL);
dns_name_clone(dns_zone_getorigin(zone), &apexname);
CHECK(dns_db_findnode(db, &apexname, false, &apexnode));
/* Add NS RRset */
RUNTIME_CHECK(dns_rdatalist_tordataset(&rdatalist_ns, &rdataset) ==
ISC_R_SUCCESS);
CHECK(dns_db_addrdataset(db, apexnode, dbversion, 0, &rdataset, 0,
NULL));
dns_rdataset_disassociate(&rdataset);
/* Add glue A RRset, if any */
if (!ISC_LIST_EMPTY(rdatalist_a.rdata)) {
RUNTIME_CHECK(
dns_rdatalist_tordataset(&rdatalist_a, &rdataset) ==
ISC_R_SUCCESS);
CHECK(dns_db_addrdataset(db, apexnode, dbversion, 0, &rdataset,
0, NULL));
dns_rdataset_disassociate(&rdataset);
}
/* Add glue AAAA RRset, if any */
if (!ISC_LIST_EMPTY(rdatalist_aaaa.rdata)) {
RUNTIME_CHECK(
dns_rdatalist_tordataset(&rdatalist_aaaa, &rdataset) ==
ISC_R_SUCCESS);
CHECK(dns_db_addrdataset(db, apexnode, dbversion, 0, &rdataset,
0, NULL));
dns_rdataset_disassociate(&rdataset);
}
dns_db_closeversion(db, &dbversion, true);
dns_zone_setdb(zone, db);
result = ISC_R_SUCCESS;
cleanup:
if (dns_rdataset_isassociated(&rdataset)) {
dns_rdataset_disassociate(&rdataset);
}
if (apexnode != NULL) {
dns_db_detachnode(db, &apexnode);
}
if (dbversion != NULL) {
dns_db_closeversion(db, &dbversion, false);
}
if (db != NULL) {
dns_db_detach(&db);
}
for (i = 0; rdatalists[i] != NULL; i++) {
while ((rdata = ISC_LIST_HEAD(rdatalists[i]->rdata)) != NULL) {
ISC_LIST_UNLINK(rdatalists[i]->rdata, rdata, link);
dns_rdata_toregion(rdata, &region);
isc_mem_put(mctx, rdata,
sizeof(*rdata) + region.length);
}
}
INSIST(dbversion == NULL);
return (result);
}
/*%
* Convert a config file zone type into a server zone type.
*/
static dns_zonetype_t
zonetype_fromconfig(const cfg_obj_t *map) {
const cfg_obj_t *obj = NULL;
isc_result_t result;
result = cfg_map_get(map, "type", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
return (named_config_getzonetype(obj));
}
/*%
* Helper function for strtoargv(). Pardon the gratuitous recursion.
*/
static isc_result_t
strtoargvsub(isc_mem_t *mctx, char *s, unsigned int *argcp, char ***argvp,
unsigned int n) {
isc_result_t result;
/* Discard leading whitespace. */
while (*s == ' ' || *s == '\t') {
s++;
}
if (*s == '\0') {
/* We have reached the end of the string. */
*argcp = n;
*argvp = isc_mem_get(mctx, n * sizeof(char *));
} else {
char *p = s;
while (*p != ' ' && *p != '\t' && *p != '\0') {
p++;
}
if (*p != '\0') {
*p++ = '\0';
}
result = strtoargvsub(mctx, p, argcp, argvp, n + 1);
if (result != ISC_R_SUCCESS) {
return (result);
}
(*argvp)[n] = s;
}
return (ISC_R_SUCCESS);
}
/*%
* Tokenize the string "s" into whitespace-separated words,
* return the number of words in '*argcp' and an array
* of pointers to the words in '*argvp'. The caller
* must free the array using isc_mem_put(). The string
* is modified in-place.
*/
static isc_result_t
strtoargv(isc_mem_t *mctx, char *s, unsigned int *argcp, char ***argvp) {
return (strtoargvsub(mctx, s, argcp, argvp, 0));
}
static const char *const primary_synonyms[] = { "primary", "master", NULL };
static const char *const secondary_synonyms[] = { "secondary", "slave", NULL };
static void
checknames(dns_zonetype_t ztype, const cfg_obj_t **maps,
const cfg_obj_t **objp) {
isc_result_t result;
switch (ztype) {
case dns_zone_secondary:
case dns_zone_mirror:
result = named_checknames_get(maps, secondary_synonyms, objp);
break;
case dns_zone_primary:
result = named_checknames_get(maps, primary_synonyms, objp);
break;
default:
UNREACHABLE();
}
INSIST(result == ISC_R_SUCCESS && objp != NULL && *objp != NULL);
}
/*
* Callback to see if a non-recursive query coming from 'srcaddr' to
* 'destaddr', with optional key 'mykey' for class 'rdclass' would be
* delivered to 'myview'.
*
* We run this unlocked as both the view list and the interface list
* are updated when the appropriate task has exclusivity.
*/
static bool
isself(dns_view_t *myview, dns_tsigkey_t *mykey, const isc_sockaddr_t *srcaddr,
const isc_sockaddr_t *dstaddr, dns_rdataclass_t rdclass, void *arg) {
dns_aclenv_t *env = NULL;
dns_view_t *view = NULL;
dns_tsigkey_t *key = NULL;
isc_netaddr_t netsrc;
isc_netaddr_t netdst;
UNUSED(arg);
/* interfacemgr can be destroyed only in exclusive mode. */
if (named_g_server->interfacemgr == NULL) {
return (true);
}
if (!ns_interfacemgr_listeningon(named_g_server->interfacemgr, dstaddr))
{
return (false);
}
isc_netaddr_fromsockaddr(&netsrc, srcaddr);
isc_netaddr_fromsockaddr(&netdst, dstaddr);
env = ns_interfacemgr_getaclenv(named_g_server->interfacemgr);
for (view = ISC_LIST_HEAD(named_g_server->viewlist); view != NULL;
view = ISC_LIST_NEXT(view, link))
{
const dns_name_t *tsig = NULL;
if (view->matchrecursiveonly) {
continue;
}
if (rdclass != view->rdclass) {
continue;
}
if (mykey != NULL) {
bool match;
isc_result_t result;
result = dns_view_gettsig(view, &mykey->name, &key);
if (result != ISC_R_SUCCESS) {
continue;
}
match = dst_key_compare(mykey->key, key->key);
dns_tsigkey_detach(&key);
if (!match) {
continue;
}
tsig = dns_tsigkey_identity(mykey);
}
if (dns_acl_allowed(&netsrc, tsig, view->matchclients, env) &&
dns_acl_allowed(&netdst, tsig, view->matchdestinations,
env))
{
break;
}
}
return (view == myview);
}
/*%
* For mirror zones, change "notify yes;" to "notify explicit;", informing the
* user only if "notify" was explicitly configured rather than inherited from
* default configuration.
*/
static dns_notifytype_t
process_notifytype(dns_notifytype_t ntype, dns_zonetype_t ztype,
const char *zname, const cfg_obj_t **maps) {
const cfg_obj_t *obj = NULL;
/*
* Return the original setting if this is not a mirror zone or if the
* zone is configured with something else than "notify yes;".
*/
if (ztype != dns_zone_mirror || ntype != dns_notifytype_yes) {
return (ntype);
}
/*
* Only log a message if "notify" was set in the configuration
* hierarchy supplied in 'maps'.
*/
if (named_config_get(maps, "notify", &obj) == ISC_R_SUCCESS) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_INFO,
"'notify explicit;' will be used for mirror zone "
"'%s'",
zname);
}
return (dns_notifytype_explicit);
}
isc_result_t
named_zone_configure(const cfg_obj_t *config, const cfg_obj_t *vconfig,
const cfg_obj_t *zconfig, cfg_aclconfctx_t *ac,
dns_kasplist_t *kasplist, dns_zone_t *zone,
dns_zone_t *raw) {
isc_result_t result;
const char *zname;
dns_rdataclass_t zclass;
dns_rdataclass_t vclass;
const cfg_obj_t *maps[5];
const cfg_obj_t *nodefault[4];
const cfg_obj_t *zoptions = NULL;
const cfg_obj_t *options = NULL;
const cfg_obj_t *obj;
const char *filename = NULL;
const char *kaspname = NULL;
const char *dupcheck;
dns_notifytype_t notifytype = dns_notifytype_yes;
uint32_t count;
unsigned int dbargc;
char **dbargv;
static char default_dbtype[] = "rbt";
static char dlz_dbtype[] = "dlz";
char *cpval = default_dbtype;
isc_mem_t *mctx = dns_zone_getmctx(zone);
dns_dialuptype_t dialup = dns_dialuptype_no;
dns_zonetype_t ztype;
int i;
int32_t journal_size;
bool multi;
bool alt;
dns_view_t *view = NULL;
dns_kasp_t *kasp = NULL;
bool check = false, fail = false;
bool warn = false, ignore = false;
bool ixfrdiff;
bool use_kasp = false;
dns_masterformat_t masterformat;
const dns_master_style_t *masterstyle = &dns_master_style_default;
isc_stats_t *zoneqrystats;
dns_stats_t *rcvquerystats;
dns_stats_t *dnssecsignstats;
dns_zonestat_level_t statlevel = dns_zonestat_none;
int seconds;
dns_ttl_t maxttl = 0; /* unlimited */
dns_zone_t *mayberaw = (raw != NULL) ? raw : zone;
bool transferinsecs = ns_server_getoption(named_g_server->sctx,
NS_SERVER_TRANSFERINSECS);
i = 0;
if (zconfig != NULL) {
zoptions = cfg_tuple_get(zconfig, "options");
nodefault[i] = maps[i] = zoptions;
i++;
}
if (vconfig != NULL) {
nodefault[i] = maps[i] = cfg_tuple_get(vconfig, "options");
i++;
}
if (config != NULL) {
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
nodefault[i] = maps[i] = options;
i++;
}
}
nodefault[i] = NULL;
maps[i++] = named_g_defaults;
maps[i] = NULL;
if (vconfig != NULL) {
CHECK(named_config_getclass(cfg_tuple_get(vconfig, "class"),
dns_rdataclass_in, &vclass));
} else {
vclass = dns_rdataclass_in;
}
/*
* Configure values common to all zone types.
*/
zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
CHECK(named_config_getclass(cfg_tuple_get(zconfig, "class"), vclass,
&zclass));
dns_zone_setclass(zone, zclass);
if (raw != NULL) {
dns_zone_setclass(raw, zclass);
}
ztype = zonetype_fromconfig(zoptions);
if (raw != NULL) {
dns_zone_settype(raw, ztype);
dns_zone_settype(zone, dns_zone_primary);
} else {
dns_zone_settype(zone, ztype);
}
obj = NULL;
result = cfg_map_get(zoptions, "database", &obj);
if (result == ISC_R_SUCCESS) {
cpval = isc_mem_strdup(mctx, cfg_obj_asstring(obj));
}
if (cpval == NULL) {
CHECK(ISC_R_NOMEMORY);
}
obj = NULL;
result = cfg_map_get(zoptions, "dlz", &obj);
if (result == ISC_R_SUCCESS) {
const char *dlzname = cfg_obj_asstring(obj);
size_t len;
if (cpval != default_dbtype) {
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': both 'database' and 'dlz' "
"specified",
zname);
CHECK(ISC_R_FAILURE);
}
len = strlen(dlzname) + 5;
cpval = isc_mem_allocate(mctx, len);
snprintf(cpval, len, "dlz %s", dlzname);
}
result = strtoargv(mctx, cpval, &dbargc, &dbargv);
if (result != ISC_R_SUCCESS && cpval != default_dbtype) {
isc_mem_free(mctx, cpval);
CHECK(result);
}
/*
* ANSI C is strange here. There is no logical reason why (char **)
* cannot be promoted automatically to (const char * const *) by the
* compiler w/o generating a warning.
*/
dns_zone_setdbtype(zone, dbargc, (const char *const *)dbargv);
isc_mem_put(mctx, dbargv, dbargc * sizeof(*dbargv));
if (cpval != default_dbtype && cpval != dlz_dbtype) {
isc_mem_free(mctx, cpval);
}
obj = NULL;
result = cfg_map_get(zoptions, "file", &obj);
if (result == ISC_R_SUCCESS) {
filename = cfg_obj_asstring(obj);
}
/*
* Unless we're using some alternative database, a primary zone
* will be needing a master file.
*/
if (ztype == dns_zone_primary && cpval == default_dbtype &&
filename == NULL)
{
isc_log_write(named_g_lctx, NAMED_LOGCATEGORY_GENERAL,
NAMED_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': 'file' not specified", zname);
CHECK(ISC_R_FAILURE);
}
if (ztype == dns_zone_secondary || ztype == dns_zone_mirror) {
masterformat = dns_masterformat_raw;
} else {
masterformat = dns_masterformat_text;
}
obj = NULL;
result = named_config_get(maps, "masterfile-format", &obj);
if (result == ISC_R_SUCCESS) {
const char *masterformatstr = cfg_obj_asstring(obj);
if (strcasecmp(masterformatstr, "text") == 0) {
masterformat = dns_masterformat_text;
} else if (strcasecmp(masterformatstr, "raw") == 0) {
masterformat = dns_masterformat_raw;
} else {
UNREACHABLE();
}
}
obj = NULL;
result = named_config_get(maps, "masterfile-style", &obj);
if (result == ISC_R_SUCCESS) {
const char *masterstylestr = cfg_obj_asstring(obj);
if (masterformat != dns_masterformat_text) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"zone '%s': 'masterfile-style' "
"can only be used with "
"'masterfile-format text'",
zname);
CHECK(ISC_R_FAILURE);
}
if (strcasecmp(masterstylestr, "full") == 0) {
masterstyle = &dns_master_style_full;
} else if (strcasecmp(masterstylestr, "relative") == 0) {
masterstyle = &dns_master_style_default;
} else {
UNREACHABLE();
}
}
obj = NULL;
result = named_config_get(maps, "max-records", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setmaxrecords(mayberaw, cfg_obj_asuint32(obj));
if (zone != mayberaw) {
dns_zone_setmaxrecords(zone, 0);
}
if (raw != NULL && filename != NULL) {
#define SIGNED ".signed"
size_t signedlen = strlen(filename) + sizeof(SIGNED);
char *signedname;
CHECK(dns_zone_setfile(raw, filename, masterformat,
masterstyle));
signedname = isc_mem_get(mctx, signedlen);
(void)snprintf(signedname, signedlen, "%s" SIGNED, filename);
result = dns_zone_setfile(zone, signedname,
dns_masterformat_raw, NULL);
isc_mem_put(mctx, signedname, signedlen);
CHECK(result);
} else {
CHECK(dns_zone_setfile(zone, filename, masterformat,
masterstyle));
}
obj = NULL;
result = cfg_map_get(zoptions, "journal", &obj);
if (result == ISC_R_SUCCESS) {
CHECK(dns_zone_setjournal(mayberaw, cfg_obj_asstring(obj)));
}
/*
* Notify messages are processed by the raw zone if it exists.
*/
if (ztype == dns_zone_secondary || ztype == dns_zone_mirror) {
CHECK(configure_zone_acl(zconfig, vconfig, config, allow_notify,
ac, mayberaw, dns_zone_setnotifyacl,
dns_zone_clearnotifyacl));
}
/*
* XXXAG This probably does not make sense for stubs.
*/
CHECK(configure_zone_acl(zconfig, vconfig, config, allow_query, ac,
zone, dns_zone_setqueryacl,
dns_zone_clearqueryacl));
CHECK(configure_zone_acl(zconfig, vconfig, config, allow_query_on, ac,
zone, dns_zone_setqueryonacl,
dns_zone_clearqueryonacl));
obj = NULL;
result = named_config_get(maps, "dialup", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (cfg_obj_isboolean(obj)) {
if (cfg_obj_asboolean(obj)) {
dialup = dns_dialuptype_yes;
} else {
dialup = dns_dialuptype_no;
}
} else {
const char *dialupstr = cfg_obj_asstring(obj);
if (strcasecmp(dialupstr, "notify") == 0) {
dialup = dns_dialuptype_notify;
} else if (strcasecmp(dialupstr, "notify-passive") == 0) {
dialup = dns_dialuptype_notifypassive;
} else if (strcasecmp(dialupstr, "refresh") == 0) {
dialup = dns_dialuptype_refresh;
} else if (strcasecmp(dialupstr, "passive") == 0) {
dialup = dns_dialuptype_passive;
} else {
UNREACHABLE();
}
}
if (raw != NULL) {
dns_zone_setdialup(raw, dialup);
}
dns_zone_setdialup(zone, dialup);
obj = NULL;
result = named_config_get(maps, "zone-statistics", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (cfg_obj_isboolean(obj)) {
if (cfg_obj_asboolean(obj)) {
statlevel = dns_zonestat_full;
} else {
statlevel = dns_zonestat_none;
}
} else {
const char *levelstr = cfg_obj_asstring(obj);
if (strcasecmp(levelstr, "full") == 0) {
statlevel = dns_zonestat_full;
} else if (strcasecmp(levelstr, "terse") == 0) {
statlevel = dns_zonestat_terse;
} else if (strcasecmp(levelstr, "none") == 0) {
statlevel = dns_zonestat_none;
} else {
UNREACHABLE();
}
}
dns_zone_setstatlevel(zone, statlevel);
zoneqrystats = NULL;
rcvquerystats = NULL;
dnssecsignstats = NULL;
if (statlevel == dns_zonestat_full) {
CHECK(isc_stats_create(mctx, &zoneqrystats,
ns_statscounter_max));
CHECK(dns_rdatatypestats_create(mctx, &rcvquerystats));
CHECK(dns_dnssecsignstats_create(mctx, &dnssecsignstats));
}
dns_zone_setrequeststats(zone, zoneqrystats);
dns_zone_setrcvquerystats(zone, rcvquerystats);
dns_zone_setdnssecsignstats(zone, dnssecsignstats);
if (zoneqrystats != NULL) {
isc_stats_detach(&zoneqrystats);
}
if (rcvquerystats != NULL) {
dns_stats_detach(&rcvquerystats);
}
if (dnssecsignstats != NULL) {
dns_stats_detach(&dnssecsignstats);
}
/*
* Configure authoritative zone functionality. This applies
* to primary servers (type "primary") and secondaries
* acting as primaries (type "secondary"), but not to stubs.
*/
if (ztype != dns_zone_stub && ztype != dns_zone_staticstub &&
ztype != dns_zone_redirect)
{
obj = NULL;
result = named_config_get(maps, "dnssec-policy", &obj);
if (result == ISC_R_SUCCESS) {
kaspname = cfg_obj_asstring(obj);
if (strcmp(kaspname, "none") != 0) {
result = dns_kasplist_find(kasplist, kaspname,
&kasp);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(
obj, named_g_lctx,
ISC_LOG_ERROR,
"dnssec-policy '%s' not found ",
kaspname);
CHECK(result);
}
dns_zone_setkasp(zone, kasp);
use_kasp = true;
}
}
if (!use_kasp) {
dns_zone_setkasp(zone, NULL);
}
obj = NULL;
result = named_config_get(maps, "notify", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (cfg_obj_isboolean(obj)) {
if (cfg_obj_asboolean(obj)) {
notifytype = dns_notifytype_yes;
} else {
notifytype = dns_notifytype_no;
}
} else {
const char *str = cfg_obj_asstring(obj);
if (strcasecmp(str, "explicit") == 0) {
notifytype = dns_notifytype_explicit;
} else if (strcasecmp(str, "master-only") == 0 ||
strcasecmp(str, "primary-only") == 0)
{
notifytype = dns_notifytype_masteronly;
} else {
UNREACHABLE();
}
}
notifytype = process_notifytype(notifytype, ztype, zname,
nodefault);
if (raw != NULL) {
dns_zone_setnotifytype(raw, dns_notifytype_no);
}
dns_zone_setnotifytype(zone, notifytype);
obj = NULL;
result = named_config_get(maps, "also-notify", &obj);
if (result == ISC_R_SUCCESS &&
(notifytype == dns_notifytype_yes ||
notifytype == dns_notifytype_explicit ||
(notifytype == dns_notifytype_masteronly &&
ztype == dns_zone_primary)))
{
dns_ipkeylist_t ipkl;
dns_ipkeylist_init(&ipkl);
CHECK(named_config_getipandkeylist(config, "primaries",
obj, mctx, &ipkl));
dns_zone_setalsonotify(zone, ipkl.addrs, ipkl.keys,
ipkl.tlss, ipkl.count);
dns_ipkeylist_clear(mctx, &ipkl);
} else {
dns_zone_setalsonotify(zone, NULL, NULL, NULL, 0);
}
obj = NULL;
result = named_config_get(maps, "parental-source", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setparentalsrc4(zone, cfg_obj_assockaddr(obj)));
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
obj = NULL;
result = named_config_get(maps, "parental-source-v6", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setparentalsrc6(zone, cfg_obj_assockaddr(obj)));
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
obj = NULL;
result = named_config_get(maps, "notify-source", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setnotifysrc4(zone, cfg_obj_assockaddr(obj)));
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
obj = NULL;
result = named_config_get(maps, "notify-source-v6", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setnotifysrc6(zone, cfg_obj_assockaddr(obj)));
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
obj = NULL;
result = named_config_get(maps, "notify-to-soa", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(zone, DNS_ZONEOPT_NOTIFYTOSOA,
cfg_obj_asboolean(obj));
dns_zone_setisself(zone, isself, NULL);
CHECK(configure_zone_acl(
zconfig, vconfig, config, allow_transfer, ac, zone,
dns_zone_setxfracl, dns_zone_clearxfracl));
obj = NULL;
result = named_config_get(maps, "max-transfer-time-out", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setmaxxfrout(
zone, transferinsecs ? cfg_obj_asuint32(obj)
: cfg_obj_asuint32(obj) * 60);
obj = NULL;
result = named_config_get(maps, "max-transfer-idle-out", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setidleout(zone, transferinsecs
? cfg_obj_asuint32(obj)
: cfg_obj_asuint32(obj) * 60);
obj = NULL;
result = named_config_get(maps, "max-journal-size", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (raw != NULL) {
dns_zone_setjournalsize(raw, -1);
}
dns_zone_setjournalsize(zone, -1);
if (cfg_obj_isstring(obj)) {
const char *str = cfg_obj_asstring(obj);
if (strcasecmp(str, "unlimited") == 0) {
journal_size = DNS_JOURNAL_SIZE_MAX;
} else {
INSIST(strcasecmp(str, "default") == 0);
journal_size = -1;
}
} else {
isc_resourcevalue_t value;
value = cfg_obj_asuint64(obj);
if (value > DNS_JOURNAL_SIZE_MAX) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"'max-journal-size "
"%" PRId64 "' "
"is too large",
value);
CHECK(ISC_R_RANGE);
}
journal_size = (uint32_t)value;
}
if (raw != NULL) {
dns_zone_setjournalsize(raw, journal_size);
}
dns_zone_setjournalsize(zone, journal_size);
obj = NULL;
result = named_config_get(maps, "ixfr-from-differences", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (cfg_obj_isboolean(obj)) {
ixfrdiff = cfg_obj_asboolean(obj);
} else if ((strcasecmp(cfg_obj_asstring(obj), "primary") == 0 ||
strcasecmp(cfg_obj_asstring(obj), "master") == 0) &&
ztype == dns_zone_primary)
{
ixfrdiff = true;
} else if ((strcasecmp(cfg_obj_asstring(obj), "secondary") ==
0 ||
strcasecmp(cfg_obj_asstring(obj), "slave") == 0) &&
ztype == dns_zone_secondary)
{
ixfrdiff = true;
} else {
ixfrdiff = false;
}
if (raw != NULL) {
dns_zone_setoption(raw, DNS_ZONEOPT_IXFRFROMDIFFS,
true);
dns_zone_setoption(zone, DNS_ZONEOPT_IXFRFROMDIFFS,
false);
} else {
dns_zone_setoption(zone, DNS_ZONEOPT_IXFRFROMDIFFS,
ixfrdiff);
}
obj = NULL;
result = named_config_get(maps, "max-ixfr-ratio", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (cfg_obj_isstring(obj)) {
dns_zone_setixfrratio(zone, 0);
} else {
dns_zone_setixfrratio(zone, cfg_obj_aspercentage(obj));
}
obj = NULL;
result = named_config_get(maps, "request-expire", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zone_setrequestexpire(zone, cfg_obj_asboolean(obj));
obj = NULL;
result = named_config_get(maps, "request-ixfr", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zone_setrequestixfr(zone, cfg_obj_asboolean(obj));
obj = NULL;
checknames(ztype, maps, &obj);
INSIST(obj != NULL);
if (strcasecmp(cfg_obj_asstring(obj), "warn") == 0) {
fail = false;
check = true;
} else if (strcasecmp(cfg_obj_asstring(obj), "fail") == 0) {
fail = check = true;
} else if (strcasecmp(cfg_obj_asstring(obj), "ignore") == 0) {
fail = check = false;
} else {
UNREACHABLE();
}
if (raw != NULL) {
dns_zone_setoption(raw, DNS_ZONEOPT_CHECKNAMES, check);
dns_zone_setoption(raw, DNS_ZONEOPT_CHECKNAMESFAIL,
fail);
dns_zone_setoption(zone, DNS_ZONEOPT_CHECKNAMES, false);
dns_zone_setoption(zone, DNS_ZONEOPT_CHECKNAMESFAIL,
false);
} else {
dns_zone_setoption(zone, DNS_ZONEOPT_CHECKNAMES, check);
dns_zone_setoption(zone, DNS_ZONEOPT_CHECKNAMESFAIL,
fail);
}
obj = NULL;
result = named_config_get(maps, "notify-delay", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setnotifydelay(zone, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "check-sibling", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(zone, DNS_ZONEOPT_CHECKSIBLING,
cfg_obj_asboolean(obj));
obj = NULL;
result = named_config_get(maps, "check-spf", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (strcasecmp(cfg_obj_asstring(obj), "warn") == 0) {
check = true;
} else if (strcasecmp(cfg_obj_asstring(obj), "ignore") == 0) {
check = false;
} else {
UNREACHABLE();
}
dns_zone_setoption(zone, DNS_ZONEOPT_CHECKSPF, check);
obj = NULL;
result = named_config_get(maps, "zero-no-soa-ttl", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setzeronosoattl(zone, cfg_obj_asboolean(obj));
obj = NULL;
result = named_config_get(maps, "nsec3-test-zone", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(zone, DNS_ZONEOPT_NSEC3TESTZONE,
cfg_obj_asboolean(obj));
} else if (ztype == dns_zone_redirect) {
dns_zone_setnotifytype(zone, dns_notifytype_no);
obj = NULL;
result = named_config_get(maps, "max-journal-size", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setjournalsize(zone, -1);
if (cfg_obj_isstring(obj)) {
const char *str = cfg_obj_asstring(obj);
if (strcasecmp(str, "unlimited") == 0) {
journal_size = DNS_JOURNAL_SIZE_MAX;
} else {
INSIST(strcasecmp(str, "default") == 0);
journal_size = -1;
}
} else {
isc_resourcevalue_t value;
value = cfg_obj_asuint64(obj);
if (value > DNS_JOURNAL_SIZE_MAX) {
cfg_obj_log(obj, named_g_lctx, ISC_LOG_ERROR,
"'max-journal-size "
"%" PRId64 "' "
"is too large",
value);
CHECK(ISC_R_RANGE);
}
journal_size = (uint32_t)value;
}
dns_zone_setjournalsize(zone, journal_size);
}
if (use_kasp) {
maxttl = dns_kasp_zonemaxttl(dns_zone_getkasp(zone));
} else {
obj = NULL;
result = named_config_get(maps, "max-zone-ttl", &obj);
if (result == ISC_R_SUCCESS) {
if (cfg_obj_isduration(obj)) {
maxttl = cfg_obj_asduration(obj);
}
}
}
dns_zone_setmaxttl(zone, maxttl);
if (raw != NULL) {
dns_zone_setmaxttl(raw, maxttl);
}
/*
* Configure update-related options. These apply to
* primary servers only.
*/
if (ztype == dns_zone_primary) {
dns_acl_t *updateacl;
CHECK(configure_zone_acl(zconfig, vconfig, config, allow_update,
ac, mayberaw, dns_zone_setupdateacl,
dns_zone_clearupdateacl));
updateacl = dns_zone_getupdateacl(mayberaw);
if (updateacl != NULL && dns_acl_isinsecure(updateacl)) {
isc_log_write(named_g_lctx, DNS_LOGCATEGORY_SECURITY,
NAMED_LOGMODULE_SERVER, ISC_LOG_WARNING,
"zone '%s' allows unsigned updates "
"from remote hosts, which is insecure",
zname);
}
CHECK(configure_zone_ssutable(zoptions, mayberaw, zname));
}
/*
* Configure DNSSEC signing. These apply to primary zones or zones that
* use inline-signing (raw != NULL).
*/
if (ztype == dns_zone_primary || raw != NULL) {
const cfg_obj_t *validity, *resign;
bool allow = false, maint = false;
bool sigvalinsecs;
if (use_kasp) {
if (dns_kasp_nsec3(kasp)) {
result = dns_zone_setnsec3param(
zone, 1, dns_kasp_nsec3flags(kasp),
dns_kasp_nsec3iter(kasp),
dns_kasp_nsec3saltlen(kasp), NULL, true,
false);
} else {
result = dns_zone_setnsec3param(
zone, 0, 0, 0, 0, NULL, true, false);
}
INSIST(result == ISC_R_SUCCESS);
}
if (use_kasp) {
seconds = (uint32_t)dns_kasp_sigvalidity_dnskey(kasp);
} else {
obj = NULL;
result = named_config_get(maps, "dnskey-sig-validity",
&obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
seconds = cfg_obj_asuint32(obj) * 86400;
}
dns_zone_setkeyvalidityinterval(zone, seconds);
if (use_kasp) {
seconds = (uint32_t)dns_kasp_sigvalidity(kasp);
dns_zone_setsigvalidityinterval(zone, seconds);
seconds = (uint32_t)dns_kasp_sigrefresh(kasp);
dns_zone_setsigresigninginterval(zone, seconds);
} else {
obj = NULL;
result = named_config_get(maps, "sig-validity-interval",
&obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
sigvalinsecs = ns_server_getoption(
named_g_server->sctx, NS_SERVER_SIGVALINSECS);
validity = cfg_tuple_get(obj, "validity");
seconds = cfg_obj_asuint32(validity);
if (!sigvalinsecs) {
seconds *= 86400;
}
dns_zone_setsigvalidityinterval(zone, seconds);
resign = cfg_tuple_get(obj, "re-sign");
if (cfg_obj_isvoid(resign)) {
seconds /= 4;
} else if (!sigvalinsecs) {
uint32_t r = cfg_obj_asuint32(resign);
if (seconds > 7 * 86400) {
seconds = r * 86400;
} else {
seconds = r * 3600;
}
} else {
seconds = cfg_obj_asuint32(resign);
}
dns_zone_setsigresigninginterval(zone, seconds);
}
obj = NULL;
result = named_config_get(maps, "key-directory", &obj);
if (result == ISC_R_SUCCESS) {
filename = cfg_obj_asstring(obj);
CHECK(dns_zone_setkeydirectory(zone, filename));
}
obj = NULL;
result = named_config_get(maps, "sig-signing-signatures", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setsignatures(zone, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "sig-signing-nodes", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setnodes(zone, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "sig-signing-type", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setprivatetype(zone, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "update-check-ksk", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(zone, DNS_ZONEOPT_UPDATECHECKKSK,
cfg_obj_asboolean(obj));
/*
* This setting will be ignored if dnssec-policy is used.
* named-checkconf will error if both are configured.
*/
obj = NULL;
result = named_config_get(maps, "dnssec-dnskey-kskonly", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(zone, DNS_ZONEOPT_DNSKEYKSKONLY,
cfg_obj_asboolean(obj));
/*
* This setting will be ignored if dnssec-policy is used.
* named-checkconf will error if both are configured.
*/
obj = NULL;
result = named_config_get(maps, "dnssec-loadkeys-interval",
&obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setrefreshkeyinterval(zone,
cfg_obj_asuint32(obj)));
obj = NULL;
result = cfg_map_get(zoptions, "auto-dnssec", &obj);
if (kasp != NULL) {
bool s2i = (strcmp(dns_kasp_getname(kasp),
"insecure") != 0);
dns_zone_setkeyopt(zone, DNS_ZONEKEY_ALLOW, true);
dns_zone_setkeyopt(zone, DNS_ZONEKEY_CREATE, !s2i);
dns_zone_setkeyopt(zone, DNS_ZONEKEY_MAINTAIN, true);
} else if (result == ISC_R_SUCCESS) {
const char *arg = cfg_obj_asstring(obj);
if (strcasecmp(arg, "allow") == 0) {
allow = true;
} else if (strcasecmp(arg, "maintain") == 0) {
allow = maint = true;
} else if (strcasecmp(arg, "off") == 0) {
/* Default */
} else {
UNREACHABLE();
}
dns_zone_setkeyopt(zone, DNS_ZONEKEY_ALLOW, allow);
dns_zone_setkeyopt(zone, DNS_ZONEKEY_CREATE, false);
dns_zone_setkeyopt(zone, DNS_ZONEKEY_MAINTAIN, maint);
}
}
if (ztype == dns_zone_secondary || ztype == dns_zone_mirror) {
CHECK(configure_zone_acl(zconfig, vconfig, config,
allow_update_forwarding, ac, mayberaw,
dns_zone_setforwardacl,
dns_zone_clearforwardacl));
}
/*%
* Configure parental agents, applies to primary and secondary zones.
*/
if (ztype == dns_zone_primary || ztype == dns_zone_secondary) {
obj = NULL;
(void)cfg_map_get(zoptions, "parental-agents", &obj);
if (obj != NULL) {
dns_ipkeylist_t ipkl;
dns_ipkeylist_init(&ipkl);
CHECK(named_config_getipandkeylist(
config, "parental-agents", obj, mctx, &ipkl));
dns_zone_setparentals(zone, ipkl.addrs, ipkl.keys,
ipkl.tlss, ipkl.count);
dns_ipkeylist_clear(mctx, &ipkl);
} else {
dns_zone_setparentals(zone, NULL, NULL, NULL, 0);
}
}
/*%
* Configure primary zone functionality.
*/
if (ztype == dns_zone_primary) {
obj = NULL;
result = named_config_get(maps, "check-wildcard", &obj);
if (result == ISC_R_SUCCESS) {
check = cfg_obj_asboolean(obj);
} else {
check = false;
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_CHECKWILDCARD, check);
obj = NULL;
result = named_config_get(maps, "check-dup-records", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dupcheck = cfg_obj_asstring(obj);
if (strcasecmp(dupcheck, "warn") == 0) {
fail = false;
check = true;
} else if (strcasecmp(dupcheck, "fail") == 0) {
fail = check = true;
} else if (strcasecmp(dupcheck, "ignore") == 0) {
fail = check = false;
} else {
UNREACHABLE();
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_CHECKDUPRR, check);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_CHECKDUPRRFAIL, fail);
obj = NULL;
result = named_config_get(maps, "check-mx", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (strcasecmp(cfg_obj_asstring(obj), "warn") == 0) {
fail = false;
check = true;
} else if (strcasecmp(cfg_obj_asstring(obj), "fail") == 0) {
fail = check = true;
} else if (strcasecmp(cfg_obj_asstring(obj), "ignore") == 0) {
fail = check = false;
} else {
UNREACHABLE();
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_CHECKMX, check);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_CHECKMXFAIL, fail);
obj = NULL;
result = named_config_get(maps, "check-integrity", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_CHECKINTEGRITY,
cfg_obj_asboolean(obj));
obj = NULL;
result = named_config_get(maps, "check-mx-cname", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (strcasecmp(cfg_obj_asstring(obj), "warn") == 0) {
warn = true;
ignore = false;
} else if (strcasecmp(cfg_obj_asstring(obj), "fail") == 0) {
warn = ignore = false;
} else if (strcasecmp(cfg_obj_asstring(obj), "ignore") == 0) {
warn = ignore = true;
} else {
UNREACHABLE();
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_WARNMXCNAME, warn);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_IGNOREMXCNAME, ignore);
obj = NULL;
result = named_config_get(maps, "check-srv-cname", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (strcasecmp(cfg_obj_asstring(obj), "warn") == 0) {
warn = true;
ignore = false;
} else if (strcasecmp(cfg_obj_asstring(obj), "fail") == 0) {
warn = ignore = false;
} else if (strcasecmp(cfg_obj_asstring(obj), "ignore") == 0) {
warn = ignore = true;
} else {
UNREACHABLE();
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_WARNSRVCNAME, warn);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_IGNORESRVCNAME,
ignore);
obj = NULL;
result = named_config_get(maps, "dnssec-secure-to-insecure",
&obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_SECURETOINSECURE,
cfg_obj_asboolean(obj));
obj = NULL;
result = cfg_map_get(zoptions, "dnssec-update-mode", &obj);
if (result == ISC_R_SUCCESS) {
const char *arg = cfg_obj_asstring(obj);
if (strcasecmp(arg, "no-resign") == 0) {
dns_zone_setkeyopt(zone, DNS_ZONEKEY_NORESIGN,
true);
} else if (strcasecmp(arg, "maintain") == 0) {
/* Default */
} else {
UNREACHABLE();
}
}
obj = NULL;
result = named_config_get(maps, "serial-update-method", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
if (strcasecmp(cfg_obj_asstring(obj), "unixtime") == 0) {
dns_zone_setserialupdatemethod(
zone, dns_updatemethod_unixtime);
} else if (strcasecmp(cfg_obj_asstring(obj), "date") == 0) {
dns_zone_setserialupdatemethod(zone,
dns_updatemethod_date);
} else {
dns_zone_setserialupdatemethod(
zone, dns_updatemethod_increment);
}
}
/*
* Configure secondary zone functionality.
*/
switch (ztype) {
case dns_zone_mirror:
/*
* Disable outgoing zone transfers for mirror zones unless they
* are explicitly enabled by zone configuration.
*/
obj = NULL;
(void)cfg_map_get(zoptions, "allow-transfer", &obj);
if (obj == NULL) {
dns_acl_t *none;
CHECK(dns_acl_none(mctx, &none));
dns_zone_setxfracl(zone, none);
dns_acl_detach(&none);
}
FALLTHROUGH;
case dns_zone_secondary:
case dns_zone_stub:
case dns_zone_redirect:
count = 0;
obj = NULL;
(void)cfg_map_get(zoptions, "primaries", &obj);
if (obj == NULL) {
(void)cfg_map_get(zoptions, "masters", &obj);
}
/*
* Use the built-in primary server list if one was not
* explicitly specified and this is a root zone mirror.
*/
if (obj == NULL && ztype == dns_zone_mirror &&
dns_name_equal(dns_zone_getorigin(zone), dns_rootname))
{
result = named_config_getremotesdef(
named_g_config, "primaries",
DEFAULT_IANA_ROOT_ZONE_PRIMARIES, &obj);
CHECK(result);
}
if (obj != NULL) {
dns_ipkeylist_t ipkl;
dns_ipkeylist_init(&ipkl);
CHECK(named_config_getipandkeylist(config, "primaries",
obj, mctx, &ipkl));
dns_zone_setprimaries(mayberaw, ipkl.addrs, ipkl.keys,
ipkl.tlss, ipkl.count);
count = ipkl.count;
dns_ipkeylist_clear(mctx, &ipkl);
} else {
dns_zone_setprimaries(mayberaw, NULL, NULL, NULL, 0);
}
multi = false;
if (count > 1) {
obj = NULL;
result = named_config_get(maps, "multi-master", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
multi = cfg_obj_asboolean(obj);
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_MULTIMASTER, multi);
obj = NULL;
result = named_config_get(maps, "max-transfer-time-in", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setmaxxfrin(
mayberaw, transferinsecs ? cfg_obj_asuint32(obj)
: cfg_obj_asuint32(obj) * 60);
obj = NULL;
result = named_config_get(maps, "max-transfer-idle-in", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setidlein(mayberaw,
transferinsecs ? cfg_obj_asuint32(obj)
: cfg_obj_asuint32(obj) * 60);
obj = NULL;
result = named_config_get(maps, "max-refresh-time", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setmaxrefreshtime(mayberaw, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "min-refresh-time", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setminrefreshtime(mayberaw, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "max-retry-time", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setmaxretrytime(mayberaw, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "min-retry-time", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
dns_zone_setminretrytime(mayberaw, cfg_obj_asuint32(obj));
obj = NULL;
result = named_config_get(maps, "transfer-source", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setxfrsource4(mayberaw,
cfg_obj_assockaddr(obj)));
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
obj = NULL;
result = named_config_get(maps, "transfer-source-v6", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setxfrsource6(mayberaw,
cfg_obj_assockaddr(obj)));
named_add_reserved_dispatch(named_g_server,
cfg_obj_assockaddr(obj));
obj = NULL;
result = named_config_get(maps, "alt-transfer-source", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setaltxfrsource4(mayberaw,
cfg_obj_assockaddr(obj)));
obj = NULL;
result = named_config_get(maps, "alt-transfer-source-v6", &obj);
INSIST(result == ISC_R_SUCCESS && obj != NULL);
CHECK(dns_zone_setaltxfrsource6(mayberaw,
cfg_obj_assockaddr(obj)));
obj = NULL;
(void)named_config_get(maps, "use-alt-transfer-source", &obj);
if (obj == NULL) {
/*
* Default off when views are in use otherwise
* on for BIND 8 compatibility.
*/
view = dns_zone_getview(zone);
if (view != NULL && strcmp(view->name, "_default") == 0)
{
alt = true;
} else {
alt = false;
}
} else {
alt = cfg_obj_asboolean(obj);
}
dns_zone_setoption(mayberaw, DNS_ZONEOPT_USEALTXFRSRC, alt);
obj = NULL;
(void)named_config_get(maps, "try-tcp-refresh", &obj);
dns_zone_setoption(mayberaw, DNS_ZONEOPT_TRYTCPREFRESH,
cfg_obj_asboolean(obj));
break;
case dns_zone_staticstub:
CHECK(configure_staticstub(zoptions, zone, zname,
default_dbtype));
break;
default:
break;
}
result = ISC_R_SUCCESS;
cleanup:
if (kasp != NULL) {
dns_kasp_detach(&kasp);
}
return (result);
}
/*
* Set up a DLZ zone as writeable
*/
isc_result_t
named_zone_configure_writeable_dlz(dns_dlzdb_t *dlzdatabase, dns_zone_t *zone,
dns_rdataclass_t rdclass, dns_name_t *name) {
dns_db_t *db = NULL;
isc_time_t now;
isc_result_t result;
TIME_NOW(&now);
dns_zone_settype(zone, dns_zone_dlz);
result = dns_sdlz_setdb(dlzdatabase, rdclass, name, &db);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_zone_dlzpostload(zone, db);
dns_db_detach(&db);
return (result);
}
bool
named_zone_reusable(dns_zone_t *zone, const cfg_obj_t *zconfig) {
const cfg_obj_t *zoptions = NULL;
const cfg_obj_t *obj = NULL;
const char *cfilename;
const char *zfilename;
dns_zone_t *raw = NULL;
bool has_raw, inline_signing;
dns_zonetype_t ztype;
zoptions = cfg_tuple_get(zconfig, "options");
/*
* We always reconfigure a static-stub zone for simplicity, assuming
* the amount of data to be loaded is small.
*/
if (zonetype_fromconfig(zoptions) == dns_zone_staticstub) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"not reusable: staticstub");
return (false);
}
/* If there's a raw zone, use that for filename and type comparison */
dns_zone_getraw(zone, &raw);
if (raw != NULL) {
zfilename = dns_zone_getfile(raw);
ztype = dns_zone_gettype(raw);
dns_zone_detach(&raw);
has_raw = true;
} else {
zfilename = dns_zone_getfile(zone);
ztype = dns_zone_gettype(zone);
has_raw = false;
}
inline_signing = named_zone_inlinesigning(zconfig);
if (!inline_signing && has_raw) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"not reusable: old zone was inline-signing");
return (false);
} else if (inline_signing && !has_raw) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"not reusable: old zone was not inline-signing");
return (false);
}
if (zonetype_fromconfig(zoptions) != ztype) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"not reusable: type mismatch");
return (false);
}
obj = NULL;
(void)cfg_map_get(zoptions, "file", &obj);
if (obj != NULL) {
cfilename = cfg_obj_asstring(obj);
} else {
cfilename = NULL;
}
if (!((cfilename == NULL && zfilename == NULL) ||
(cfilename != NULL && zfilename != NULL &&
strcmp(cfilename, zfilename) == 0)))
{
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"not reusable: filename mismatch");
return (false);
}
return (true);
}
bool
named_zone_inlinesigning(const cfg_obj_t *zconfig) {
const cfg_obj_t *zoptions = NULL;
const cfg_obj_t *signing = NULL;
bool inline_signing = false;
zoptions = cfg_tuple_get(zconfig, "options");
inline_signing = (cfg_map_get(zoptions, "inline-signing", &signing) ==
ISC_R_SUCCESS &&
cfg_obj_asboolean(signing));
return (inline_signing);
}
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