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What used to be dns_view_find() is now dns_view_simplefind().

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There's now a new dns_view_find() that will return DNS_R_CNAME and DNS_R_DNAME.
Also, both find routines now also return DNS_R_NXDOMAIN and DNS_R_NXRRSET
so that callers can tell whether or not a fetch might be useful.
This commit is contained in:
Bob Halley 2000-01-15 00:47:45 +00:00
parent daf83a2937
commit 8f5df5f1fe
2 changed files with 101 additions and 15 deletions
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59
lib/dns/include/dns/view.h
View file

@ -255,8 +255,61 @@ dns_view_freeze(dns_view_t *view);
isc_result_t
dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
isc_stdtime_t now, unsigned int options, isc_boolean_t use_hints,
isc_stdtime_t now, unsigned int options,
isc_boolean_t use_hints, dns_name_t *foundname,
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
/*
* Find an rdataset whose owner name is 'name', and whose type is
* 'type'.
*
* Notes:
*
* See the description of dns_db_find() for information about 'options'.
* If the caller sets DNS_DBFIND_GLUEOK, it must ensure that 'name'
* and 'type' are appropriate for glue retrieval.
*
* If 'now' is zero, then the current time will be used.
*
* If 'use_hints' is ISC_TRUE, and the view has a hints database, then
* it will be searched last. If the answer is found in the hints
* database, the result code will be DNS_R_HINT.
*
* 'foundname' must meet the requirements of dns_db_find().
*
* If 'sigrdataset' is not NULL, and there is a SIG rdataset which
* covers 'type', then 'sigrdataset' will be bound to it.
*
* Requires:
*
* 'view' is a valid, frozen view.
*
* 'name' is valid name.
*
* 'type' is a valid dns_rdatatype_t, and is not a meta query type
* (e.g. dns_rdatatype_any), or dns_rdatatype_sig.
*
* 'foundname' is
*
* 'rdataset' is a valid, disassociated rdataset.
*
* 'sigrdataset' is NULL, or is a valid, disassociated rdataset.
*
* Ensures:
*
* In successful cases, 'rdataset', and possibly 'sigrdataset', are
* bound to the found data.
*
* Returns:
*
* Any result that dns_db_find() can return, with the exception of
* DNS_R_DELEGATION.
*/
isc_result_t
dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
isc_stdtime_t now, unsigned int options,
isc_boolean_t use_hints,
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
/*
* Find an rdataset whose owner name is 'name', and whose type is
* 'type'.
@ -300,11 +353,13 @@ dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
*
* Returns:
*
* ISC_R_SUCCESS Success.
* ISC_R_SUCCESS Success; result is desired type.
* DNS_R_GLUE Success; result is glue.
* DNS_R_HINT Success; result is a hint.
* DNS_R_NCACHENXDOMAIN Success; result is a ncache entry.
* DNS_R_NCACHENXRRSET Success; result is a ncache entry.
* DNS_R_NXDOMAIN The name does not exist.
* DNS_R_NXRRSET The rrset does not exist.
* ISC_R_NOTFOUND No matching data found,
* or an error occurred.
*/

57
lib/dns/view.c
View file

@ -394,11 +394,11 @@ dns_view_findzone(dns_view_t *view, dns_name_t *name, dns_zone_t **zonep) {
isc_result_t
dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
isc_stdtime_t now, unsigned int options, isc_boolean_t use_hints,
isc_stdtime_t now, unsigned int options,
isc_boolean_t use_hints, dns_name_t *foundname,
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
isc_result_t result;
dns_fixedname_t foundname;
dns_db_t *db;
dns_dbversion_t *version;
isc_boolean_t is_zone;
@ -443,10 +443,8 @@ dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
/*
* Now look for an answer in the database.
*/
dns_fixedname_init(&foundname);
result = dns_db_find(db, name, NULL, type, options,
now, NULL, dns_fixedname_name(&foundname),
rdataset, sigrdataset);
now, NULL, foundname, rdataset, sigrdataset);
if (result == DNS_R_DELEGATION ||
result == DNS_R_NOTFOUND) {
@ -515,21 +513,23 @@ dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
dns_rdataset_disassociate(rdataset);
if (sigrdataset != NULL && sigrdataset->methods != NULL)
dns_rdataset_disassociate(sigrdataset);
dns_fixedname_init(&foundname);
result = dns_db_find(view->hints, name, NULL, type, options,
now, NULL, dns_fixedname_name(&foundname),
now, NULL, foundname,
rdataset, sigrdataset);
if (result == ISC_R_SUCCESS || result == DNS_R_GLUE)
result = DNS_R_HINT;
}
cleanup:
if (result != ISC_R_SUCCESS &&
result != DNS_R_GLUE &&
result != DNS_R_HINT &&
result != DNS_R_NCACHENXDOMAIN &&
result != DNS_R_NCACHENXRRSET)
result = DNS_R_NOTFOUND;
if (result == DNS_R_NXDOMAIN || result == DNS_R_NXRRSET) {
/*
* We don't care about any DNSSEC proof data in these cases.
*/
if (rdataset->methods != NULL)
dns_rdataset_disassociate(rdataset);
if (sigrdataset != NULL && sigrdataset->methods != NULL)
dns_rdataset_disassociate(sigrdataset);
}
if (zrdataset.methods != NULL) {
dns_rdataset_disassociate(&zrdataset);
@ -544,6 +544,37 @@ dns_view_find(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
return (result);
}
isc_result_t
dns_view_simplefind(dns_view_t *view, dns_name_t *name, dns_rdatatype_t type,
isc_stdtime_t now, unsigned int options,
isc_boolean_t use_hints,
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset)
{
isc_result_t result;
dns_fixedname_t foundname;
dns_fixedname_init(&foundname);
result = dns_view_find(view, name, type, now, options, use_hints,
dns_fixedname_name(&foundname),
rdataset, sigrdataset);
if (result != ISC_R_SUCCESS &&
result != DNS_R_GLUE &&
result != DNS_R_HINT &&
result != DNS_R_NCACHENXDOMAIN &&
result != DNS_R_NCACHENXRRSET &&
result != DNS_R_NXDOMAIN &&
result != DNS_R_NXRRSET &&
result != DNS_R_NOTFOUND) {
if (rdataset->methods != NULL)
dns_rdataset_disassociate(rdataset);
if (sigrdataset != NULL && sigrdataset->methods != NULL)
dns_rdataset_disassociate(sigrdataset);
result = DNS_R_NOTFOUND;
}
return (result);
}
isc_result_t
dns_view_findzonecut(dns_view_t *view, dns_name_t *name, dns_name_t *fname,
isc_stdtime_t now, unsigned int options,