ya_result
nsec_update_zone(zdb_zone *zone)
{
nsec_node *nsec_tree = NULL;
soa_rdata soa;
u8 name[MAX_DOMAIN_LENGTH];
u8 inverse_name[MAX_DOMAIN_LENGTH];
u8 tmp_bitmap[256 * (1 + 1 + 32)]; /* 'max window count' * 'max window length' */
ya_result return_code;
if(FAIL(return_code = zdb_zone_getsoa(zone, &soa)))
{
return return_code;
}
zdb_zone_label_iterator label_iterator;
zdb_zone_label_iterator_init(zone, &label_iterator);
while(zdb_zone_label_iterator_hasnext(&label_iterator))
{
zdb_zone_label_iterator_nextname(&label_iterator, name);
zdb_rr_label* label = zdb_zone_label_iterator_next(&label_iterator);
if(zdb_rr_label_is_glue(label) || (label->resource_record_set == NULL))
{
continue;
}
nsec_inverse_name(inverse_name, name);
nsec_node *node = nsec_avl_insert(&nsec_tree, inverse_name);
node->label = label;
label->nsec.nsec.node = node;
}
/*
* Now that we have the NSEC chain
*/
nsec_node *first_node;
nsec_node *node;
type_bit_maps_context tbmctx;
nsec_avl_iterator nsec_iter;
nsec_avl_iterator_init(&nsec_tree, &nsec_iter);
if(nsec_avl_iterator_hasnext(&nsec_iter))
{
first_node = nsec_avl_iterator_next_node(&nsec_iter);
node = first_node;
do
{
nsec_node *next_node;
nsec_update_zone_count++;
if(nsec_avl_iterator_hasnext(&nsec_iter))
{
next_node = nsec_avl_iterator_next_node(&nsec_iter);
}
else
{
next_node = first_node;
}
/*
* Compute the type bitmap
*/
zdb_rr_label *label = node->label;
u32 tbm_size = type_bit_maps_initialize(&tbmctx, label, TRUE, TRUE);
type_bit_maps_write(tmp_bitmap, &tbmctx);
nsec_inverse_name(name, next_node->inverse_relative_name);
/*
* Get the NSEC record
*/
zdb_packed_ttlrdata *nsec_record;
if((nsec_record = zdb_record_find(&label->resource_record_set, TYPE_NSEC)) != NULL)
{
/*
* has record -> compare the type and the nsec next
* if something does not match remove the record and its signature (no record)
*
*/
if(nsec_record->next == NULL)
{
u8* rdata = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
u16 size = ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_record);
u16 dname_len = dnsname_len(rdata);
if(dname_len < size)
{
u8* type_bitmap = &rdata[dname_len];
/*
* check the type bitmap
*/
if(memcmp(tmp_bitmap, type_bitmap, size - dname_len) == 0)
{
/*
* check the nsec next
*/
if(dnsname_equals(rdata, name))
{
/* All good */
label->flags |= ZDB_RR_LABEL_NSEC;
node = next_node;
continue;
}
}
}
}
if(zdb_listener_notify_enabled())
{
zdb_packed_ttlrdata *nsec_rec = nsec_record;
do
{
zdb_ttlrdata unpacked_ttlrdata;
unpacked_ttlrdata.ttl = nsec_rec->ttl;
unpacked_ttlrdata.rdata_size = ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_rec);
unpacked_ttlrdata.rdata_pointer = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_rec);
zdb_listener_notify_remove_record(name, TYPE_NSEC, &unpacked_ttlrdata);
nsec_rec = nsec_rec->next;
}
while(nsec_rec != NULL);
}
zdb_record_delete(&label->resource_record_set, TYPE_NSEC);
rrsig_delete(name, label, TYPE_NSEC);
nsec_record = NULL;
}
/*
* no record -> create one and schedule a signature
*/
if(nsec_record == NULL)
{
zdb_packed_ttlrdata *nsec_record;
u16 dname_len = nsec_inverse_name(name, next_node->inverse_relative_name);
u16 rdata_size = dname_len + tbm_size;
ZDB_RECORD_ZALLOC_EMPTY(nsec_record, soa.minimum, rdata_size);
u8* rdata = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
memcpy(rdata, name, dname_len);
rdata += dname_len;
memcpy(rdata, tmp_bitmap, tbm_size);
zdb_record_insert(&label->resource_record_set, TYPE_NSEC, nsec_record);
/*
* Schedule a signature
*/
}
label->flags |= ZDB_RR_LABEL_NSEC;
node = next_node;
}
while(node != first_node);
}
zone->nsec.nsec = nsec_tree;
return SUCCESS;
}
bool
nsec_update_label_record(zdb_rr_label *label, nsec_node *node, nsec_node *next_node, u8 *name, u32 ttl)
{
type_bit_maps_context tbmctx;
u8 tmp_bitmap[256 * (1 + 1 + 32)]; /* 'max window count' * 'max window length' */
u32 tbm_size = type_bit_maps_initialize(&tbmctx, label, TRUE, TRUE);
type_bit_maps_write(tmp_bitmap, &tbmctx);
/*
* Get the NSEC record
*/
zdb_packed_ttlrdata *nsec_record;
if((nsec_record = zdb_record_find(&label->resource_record_set, TYPE_NSEC)) != NULL)
{
/*
* has record -> compare the type and the nsec next
* if something does not match remove the record and its signature (no record)
*
*/
log_debug("nsec_update_label_record: [%{dnsname}] %{dnsname} (=> %{dnsname}) updating record.", name, node->inverse_relative_name, next_node->inverse_relative_name);
/*
* If there is more than one record, clean-up
*/
if(nsec_record->next == NULL)
{
u8* rdata = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
u16 size = ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_record);
u16 dname_len = dnsname_len(rdata);
if(dname_len < size)
{
u8* type_bitmap = &rdata[dname_len];
/*
* check the type bitmap
*/
if(memcmp(tmp_bitmap, type_bitmap, size - dname_len) == 0)
{
/*
* check the nsec next
*/
if(dnsname_equals(rdata, name))
{
/* All good */
return FALSE;
}
}
}
}
if(zdb_listener_notify_enabled())
{
zdb_packed_ttlrdata *nsec_rec = nsec_record;
do
{
zdb_ttlrdata unpacked_ttlrdata;
unpacked_ttlrdata.ttl = nsec_rec->ttl;
unpacked_ttlrdata.rdata_size = ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_rec);
unpacked_ttlrdata.rdata_pointer = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_rec);
zdb_listener_notify_remove_record(name, TYPE_NSEC, &unpacked_ttlrdata);
nsec_rec = nsec_rec->next;
}
while(nsec_rec != NULL);
}
zdb_record_delete(&label->resource_record_set, TYPE_NSEC);
rrsig_delete(name, label, TYPE_NSEC);
nsec_record = NULL;
}
/*
* no record -> create one and schedule a signature
*/
if(nsec_record == NULL)
{
zdb_packed_ttlrdata *nsec_record;
u8 next_name[256];
log_debug("nsec_update_label_record: [%{dnsname}] %{dnsname} (=> %{dnsname}) building new record.", name, node->inverse_relative_name, next_node->inverse_relative_name);
u16 dname_len = nsec_inverse_name(next_name, next_node->inverse_relative_name);
u16 rdata_size = dname_len + tbm_size;
ZDB_RECORD_ZALLOC_EMPTY(nsec_record, ttl, rdata_size);
u8* rdata = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
memcpy(rdata, next_name, dname_len);
rdata += dname_len;
memcpy(rdata, tmp_bitmap, tbm_size);
zdb_record_insert(&label->resource_record_set, TYPE_NSEC, nsec_record);
if(zdb_listener_notify_enabled())
{
dnsname_vector name_path;
zdb_ttlrdata unpacked_ttlrdata;
unpacked_ttlrdata.ttl = ttl;
unpacked_ttlrdata.rdata_size = rdata_size;
unpacked_ttlrdata.rdata_pointer = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
dnsname_to_dnsname_vector(name, &name_path);
zdb_listener_notify_add_record(name_path.labels, name_path.size, TYPE_NSEC, &unpacked_ttlrdata);
}
/*
* Schedule a signature
*/
}
label->flags |= ZDB_RR_LABEL_NSEC;
return TRUE;
}
ya_result
nsec_update_zone(zdb_zone *zone, bool read_only) // read_only a.k.a slave
{
nsec_node *nsec_tree = NULL;
nsec_node *first_node;
nsec_node *node;
u8 *prev_name;
u8 *name;
soa_rdata soa;
u32 missing_nsec_records = 0;
u32 sibling_count = 0;
u32 nsec_under_delegation = 0;
ya_result return_code;
u8 name_buffer[2][MAX_DOMAIN_LENGTH];
u8 inverse_name[MAX_DOMAIN_LENGTH];
u8 tmp_bitmap[256 * (1 + 1 + 32)]; /* 'max window count' * 'max window length' */
yassert(zdb_zone_islocked_weak(zone));
if(FAIL(return_code = zdb_zone_getsoa(zone, &soa))) // zone is locked (weak)
{
return return_code;
}
#ifdef DEBUG
memset(name_buffer, 0xde, sizeof(name_buffer));
#endif
name = name_buffer[0];
prev_name = name_buffer[1];
zdb_zone_label_iterator label_iterator;
zdb_zone_label_iterator_init(&label_iterator, zone);
while(zdb_zone_label_iterator_hasnext(&label_iterator))
{
zdb_zone_label_iterator_nextname(&label_iterator, name);
zdb_rr_label* label = zdb_zone_label_iterator_next(&label_iterator);
if(zdb_rr_label_is_glue(label) || (label->resource_record_set == NULL))
{
// we are under a delegation or on an empty (non-terminal)
// there should not be an NSEC record here
zdb_packed_ttlrdata *nsec_record;
if((nsec_record = zdb_record_find(&label->resource_record_set, TYPE_NSEC)) != NULL) // zone is locked
{
nsec_under_delegation++;
log_err("nsec: %{dnsname}: unexpected NSEC record under a delegation", name);
}
continue;
}
nsec_inverse_name(inverse_name, name);
nsec_node *node = nsec_avl_insert(&nsec_tree, inverse_name);
node->label = label;
label->nsec.nsec.node = node;
}
/*
* Now that we have the NSEC chain
*/
type_bit_maps_context tbmctx;
nsec_avl_iterator nsec_iter;
nsec_avl_iterator_init(&nsec_tree, &nsec_iter);
if(nsec_avl_iterator_hasnext(&nsec_iter))
{
first_node = nsec_avl_iterator_next_node(&nsec_iter);
node = first_node;
do
{
nsec_node *next_node;
nsec_update_zone_count++;
if(nsec_avl_iterator_hasnext(&nsec_iter))
{
next_node = nsec_avl_iterator_next_node(&nsec_iter);
}
else
{
next_node = first_node;
}
/*
* Compute the type bitmap
*/
zdb_rr_label *label = node->label;
if(label == NULL)
{
node = next_node;
continue;
}
u32 tbm_size = type_bit_maps_initialise_from_label(&tbmctx, label, TRUE, TRUE);
type_bit_maps_write(&tbmctx, tmp_bitmap);
u8 *tmp_name = prev_name;
prev_name = name;
name = tmp_name;
nsec_inverse_name(name, next_node->inverse_relative_name);
/*
* Get the NSEC record
*/
zdb_packed_ttlrdata *nsec_record;
if((nsec_record = zdb_record_find(&label->resource_record_set, TYPE_NSEC)) != NULL) // zone is locked
{
/*
* has record -> compare the type and the nsec next
* if something does not match remove the record and its signature (no record)
*
*/
if(nsec_record->next == NULL) // should only be one record => delete all if not the case (the rrsig is lost anyway)
{
const u8 *rdata = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
const u16 size = ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_record);
const u16 dname_len = dnsname_len(rdata);
if(dname_len < size)
{
const u8 *type_bitmap = &rdata[dname_len];
/*
* check the type bitmap
*/
if(memcmp(tmp_bitmap, type_bitmap, size - dname_len) == 0)
{
/*
* check the nsec next
*/
if(dnsname_equals(rdata, name))
{
/* All good */
label->flags |= ZDB_RR_LABEL_NSEC;
node = next_node;
continue;
}
else // else the "next fqdn" do not match (this is irrecoverable for a slave)
{
rdata_desc nsec_desc = {TYPE_NSEC, size, rdata};
log_debug("nsec: %{dnsname}: src: %{dnsname} %{typerdatadesc} next field do not match expected value (%{dnsname})", zone->origin, prev_name, &nsec_desc, name);
}
}
else // else the type bitmap do not match (this is wrong)
{
rdata_desc nsec_desc = {TYPE_NSEC, size, rdata};
log_debug("nsec: %{dnsname}: src: %{dnsname} %{typerdatadesc} types map do not match expected value", zone->origin, prev_name, &nsec_desc);
}
}
else // else the "next fqdn" do not match (early test, this is irrecoverable for a slave)
{
rdata_desc nsec_desc = {TYPE_NSEC, size, rdata};
log_debug("nsec: %{dnsname}: src: %{dnsname} %{typerdatadesc} next field do not match expected value (%{dnsname})", zone->origin, prev_name, &nsec_desc, name);
}
}
else
{
sibling_count++;
log_warn("nsec: %{dnsname}: %{dnsname}: multiple NSEC records where only one is expected", zone->origin, prev_name);
}
// wrong NSEC RRSET
zdb_packed_ttlrdata *nsec_rec = nsec_record;
do
{
zdb_ttlrdata unpacked_ttlrdata;
unpacked_ttlrdata.ttl = nsec_rec->ttl;
unpacked_ttlrdata.rdata_size = ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_rec);
unpacked_ttlrdata.rdata_pointer = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_rec);
rdata_desc nsec_desc = {TYPE_NSEC, unpacked_ttlrdata.rdata_size, unpacked_ttlrdata.rdata_pointer};
if(!read_only)
{
log_warn("nsec: %{dnsname}: del: %{dnsname} %{typerdatadesc}", zone->origin, prev_name, &nsec_desc);
#if ZDB_CHANGE_FEEDBACK_SUPPORT
zdb_listener_notify_remove_record(zone, name, TYPE_NSEC, &unpacked_ttlrdata);
#endif
}
else
{
log_err("nsec: %{dnsname}: got: %{dnsname} %{typerdatadesc}", zone->origin, prev_name, &nsec_desc);
}
nsec_rec = nsec_rec->next;
}
while(nsec_rec != NULL);
if(!read_only)
{
zdb_record_delete(&label->resource_record_set, TYPE_NSEC);
rrsig_delete(zone, name, label, TYPE_NSEC);
nsec_record = NULL;
}
}
/*
* no record -> create one and schedule a signature (MASTER ONLY)
*/
if(nsec_record == NULL)
{
missing_nsec_records++;
zdb_packed_ttlrdata *nsec_record;
u16 dname_len = nsec_inverse_name(name, next_node->inverse_relative_name);
u16 rdata_size = dname_len + tbm_size;
ZDB_RECORD_ZALLOC_EMPTY(nsec_record, soa.minimum, rdata_size);
u8* rdata = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
memcpy(rdata, name, dname_len);
rdata += dname_len;
memcpy(rdata, tmp_bitmap, tbm_size);
rdata_desc nsec_desc = {TYPE_NSEC, ZDB_PACKEDRECORD_PTR_RDATASIZE(nsec_record), ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record)};
if(!read_only)
{
zdb_record_insert(&label->resource_record_set, TYPE_NSEC, nsec_record);
#ifdef DEBUG
log_debug("nsec: %{dnsname}: add: %{dnsname} %{typerdatadesc}", zone->origin, prev_name, &nsec_desc);
#endif
#if ZDB_CHANGE_FEEDBACK_SUPPORT
if(zdb_listener_notify_enabled())
{
dnsname_vector name_path;
zdb_ttlrdata unpacked_ttlrdata;
unpacked_ttlrdata.ttl = nsec_record->ttl;
unpacked_ttlrdata.rdata_size = rdata_size;
unpacked_ttlrdata.rdata_pointer = ZDB_PACKEDRECORD_PTR_RDATAPTR(nsec_record);
dnsname_to_dnsname_vector(name, &name_path);
zdb_listener_notify_add_record(zone, name_path.labels, name_path.size, TYPE_NSEC, &unpacked_ttlrdata);
}
#endif
/*
* Schedule a signature
*/
}
else
{
log_warn("nsec: %{dnsname}: need: %{dnsname} %{typerdatadesc}", zone->origin, prev_name, &nsec_desc);
ZDB_RECORD_ZFREE(nsec_record);
}
}
label->flags |= ZDB_RR_LABEL_NSEC;
node = next_node;
}
while(node != first_node);
}
zone->nsec.nsec = nsec_tree;
if(read_only)
{
if(missing_nsec_records + sibling_count + nsec_under_delegation)
{
log_err("nsec: missing records: %u, nsec with siblings: %u, nsec under delegation: %u", missing_nsec_records, sibling_count, nsec_under_delegation);
//return DNSSEC_ERROR_NSEC_INVALIDZONESTATE;
}
}
else
{
if(missing_nsec_records + sibling_count + nsec_under_delegation)
{
log_warn("nsec: missing records: %u, nsec with siblings: %u, nsec under delegation: %u", missing_nsec_records, sibling_count, nsec_under_delegation);
}
}
return SUCCESS;
}