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Code Issues Releases Wiki Activity

snapshot - partial support for negative answer verification and a couple bug

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fixes.
This commit is contained in:
Brian Wellington 2000-04-13 18:10:07 +00:00
parent 53c892082e
commit e83cae7fa8
1 changed files with 158 additions and 6 deletions
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164
lib/dns/validator.c
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@ -33,7 +33,9 @@
#include <dns/events.h>
#include <dns/keytable.h>
#include <dns/log.h>
#include <dns/message.h>
#include <dns/name.h>
#include <dns/nxt.h>
#include <dns/rdata.h>
#include <dns/rdatatype.h>
#include <dns/rdataset.h>
@ -75,18 +77,22 @@ struct dns_validator {
isc_task_t * task;
isc_taskaction_t action;
void * arg;
dns_name_t * queryname;
};
#define VALIDATOR_MAGIC 0x56616c3fU /* Val?. */
#define VALID_VALIDATOR(v) ISC_MAGIC_VALID(v, VALIDATOR_MAGIC)
#define VALATTR_SHUTDOWN 0x01
#define VALATTR_NEGATIVE 0x02
#define SHUTDOWN(v) (((v)->attributes & VALATTR_SHUTDOWN) != 0)
static inline isc_result_t get_dst_key(dns_validator_t *val,
dns_siginfo_t *siginfo,
dns_rdataset_t *rdataset);
static inline isc_result_t validate(dns_validator_t *val, isc_boolean_t resume);
static inline isc_result_t nxtvalidate(dns_validator_t *val,
isc_boolean_t resume);
static void validator_log(dns_validator_t *val, int level,
const char *fmt, ...);
@ -130,6 +136,12 @@ validator_done(dns_validator_t *val, isc_result_t result) {
val->event->type = DNS_EVENT_VALIDATORDONE;
val->event->action = val->action;
val->event->arg = val->arg;
if ((val->attributes & VALATTR_NEGATIVE) != 0) {
val->event->rdataset = NULL;
val->event->sigrdataset = NULL;
if (val->queryname != NULL)
val->event->name = val->queryname;
}
isc_task_sendanddetach(&task, (isc_event_t **)&val->event);
}
@ -156,7 +168,10 @@ fetch_callback_validator(isc_task_t *task, isc_event_t *event) {
goto free_event;
}
LOCK(&val->lock);
result = validate(val, ISC_TRUE);
if (val->attributes & VALATTR_NEGATIVE)
result = nxtvalidate(val, ISC_TRUE);
else
result = validate(val, ISC_TRUE);
if (result != DNS_R_CONTINUE) {
validator_done(val, result);
goto free_event;
@ -195,7 +210,10 @@ keyvalidated(isc_task_t *task, isc_event_t *event) {
goto free_event;
}
LOCK(&val->lock);
result = validate(val, ISC_TRUE);
if (val->attributes & VALATTR_NEGATIVE)
result = nxtvalidate(val, ISC_TRUE);
else
result = validate(val, ISC_TRUE);
if (result != DNS_R_WAIT)
validator_done(val, result);
UNLOCK(&val->lock);
@ -513,6 +531,12 @@ validate(dns_validator_t *val, isc_boolean_t resume) {
result = dns_dnssec_verify(event->name, event->rdataset,
val->key, val->view->mctx, &rdata);
if (val->keynode != NULL)
dns_keytable_detachkeynode(val->keytable,
&val->keynode);
else if (val->key != NULL)
dst_key_free(val->key);
val->key = NULL;
if (result == ISC_R_SUCCESS) {
event->rdataset->trust = dns_trust_secure;
event->sigrdataset->trust = dns_trust_secure;
@ -524,6 +548,130 @@ validate(dns_validator_t *val, isc_boolean_t resume) {
return (result);
}
static inline isc_result_t
nxtvalidate(dns_validator_t *val, isc_boolean_t resume) {
dns_name_t *name;
dns_rdata_t rdata;
dns_message_t *message = val->event->message;
isc_result_t result;
int order;
isc_region_t r;
dns_name_t nextname;
isc_boolean_t firstname = ISC_TRUE;
if (!resume) {
val->attributes |= VALATTR_NEGATIVE;
result = dns_message_firstname(message, DNS_SECTION_AUTHORITY);
if (result != ISC_R_SUCCESS)
validator_done(val, ISC_R_NOTFOUND);
}
else
result = ISC_R_SUCCESS;
for (;
result == ISC_R_SUCCESS;
result = dns_message_nextname(message, DNS_SECTION_AUTHORITY))
{
dns_rdataset_t *rdataset, *sigrdataset;
name = NULL;
dns_message_currentname(message, DNS_SECTION_AUTHORITY, &name);
if (!resume || !firstname) {
rdataset = ISC_LIST_HEAD(name->list);
for (rdataset = ISC_LIST_HEAD(name->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link))
{
if (rdataset->type != dns_rdatatype_nxt)
continue;
for (sigrdataset = ISC_LIST_HEAD(name->list);
sigrdataset != NULL;
sigrdataset = ISC_LIST_NEXT(sigrdataset,
link))
{
if (sigrdataset->type ==
dns_rdatatype_sig
&&
sigrdataset->covers ==
rdataset->type)
break;
}
if (sigrdataset != NULL)
break;
}
if (rdataset == NULL)
continue;
val->event->rdataset = rdataset;
val->event->sigrdataset = sigrdataset;
val->queryname = val->event->name;
val->event->name = name;
}
firstname = ISC_FALSE;
result = validate(val, resume);
if (result != ISC_R_SUCCESS)
return (result);
order = dns_name_compare(val->queryname, val->event->name);
if (order == 0) {
dns_name_t *qname = NULL;
dns_rdataset_t *qrdataset = NULL;
dns_rdatatype_t qtype;
validator_log(val, ISC_LOG_DEBUG(3),
"nxt owner is the same");
result = dns_message_firstname(val->event->message,
DNS_SECTION_QUESTION);
INSIST(result == ISC_R_SUCCESS);
dns_message_currentname(val->event->message,
DNS_SECTION_QUESTION,
&qname);
qrdataset = ISC_LIST_HEAD(qname->list);
qtype = qrdataset->type;
if (qtype > 128) {
validator_log(val, ISC_LOG_DEBUG(3),
"invalid type %d", qtype);
continue;
}
dns_rdataset_first(val->event->rdataset);
INSIST(result == ISC_R_SUCCESS);
dns_rdataset_current(val->event->rdataset, &rdata);
if (dns_nxt_typepresent(&rdata, qtype)) {
validator_log(val, ISC_LOG_DEBUG(3),
"type should not be present");
continue;
}
}
else if (order > 0) {
result = dns_rdataset_first(val->event->rdataset);
INSIST(result == ISC_R_SUCCESS);
dns_rdataset_current(val->event->rdataset, &rdata);
dns_rdata_toregion(&rdata, &r);
dns_name_init(&nextname, NULL);
dns_name_fromregion(&nextname, &r);
order = dns_name_compare(val->queryname, &nextname);
if (order >= 0) {
INSIST(val->siginfo != NULL);
if (!dns_name_equal(&val->siginfo->signer,
&nextname))
{
validator_log(val, ISC_LOG_DEBUG(3),
"next name is not greater");
continue;
}
}
}
else {
validator_log(val, ISC_LOG_DEBUG(3),
"nxt owner name is not less");
continue;
}
validator_log(val, ISC_LOG_DEBUG(3),
"nxt range and/or bitmask is ok");
return (ISC_R_SUCCESS);
}
return (result);
}
static void
validator_start(isc_task_t *task, isc_event_t *event) {
dns_validator_t *val;
@ -544,11 +692,14 @@ validator_start(isc_task_t *task, isc_event_t *event) {
* could still get complicated.
*/
result = validate(val, ISC_FALSE);
} else {
}
else if (val->event->rdataset == NULL &&
val->event->sigrdataset == NULL)
{
/*
* This is a nonexistence validation.
*/
result = ISC_R_NOTIMPLEMENTED;
result = nxtvalidate(val, ISC_FALSE);
}
if (result != DNS_R_WAIT)
@ -608,6 +759,7 @@ dns_validator_create(dns_view_t *view, dns_name_t *name,
val->task = task;
val->action = action;
val->arg = arg;
val->queryname = NULL;
val->magic = VALIDATOR_MAGIC;
isc_task_send(task, (isc_event_t **)&event);
@ -655,10 +807,10 @@ destroy(dns_validator_t *val) {
REQUIRE(val->event == NULL);
REQUIRE(val->fetch == NULL);
if (val->key != NULL)
dst_key_free(val->key);
if (val->keynode != NULL)
dns_keytable_detachkeynode(val->keytable, &val->keynode);
else if (val->key != NULL)
dst_key_free(val->key);
isc_mutex_destroy(&val->lock);
mctx = val->view->mctx;
dns_view_detach(&val->view);