validator.c File Reference

This file contains a module that performs validation of DNS queries. More...

#include "config.h"
#include "validator/validator.h"
#include "validator/val_anchor.h"
#include "validator/val_kcache.h"
#include "validator/val_kentry.h"
#include "validator/val_utils.h"
#include "validator/val_nsec.h"
#include "validator/val_nsec3.h"
#include "services/cache/dns.h"
#include "util/data/dname.h"
#include "util/module.h"
#include "util/log.h"
#include "util/net_help.h"
#include "util/regional.h"
#include "util/config_file.h"
#include "util/fptr_wlist.h"

Functions

static int fill_nsec3_iter (struct val_env *ve, char *s, int c)
 fill up nsec3 key iterations config entry
static int val_apply_cfg (struct module_env *env, struct val_env *val_env, struct config_file *cfg)
 apply config settings to validator
int val_init (struct module_env *env, int id)
 validator init
void val_deinit (struct module_env *env, int id)
 validator deinit
static struct val_qstateval_new (struct module_qstate *qstate, int id)
 allocate new validator query state
static int val_error (struct module_qstate *qstate, int id)
 Exit validation with an error status.
static int needs_validation (struct module_qstate *qstate, int ret_rc, struct dns_msg *ret_msg)
 Check to see if a given response needs to go through the validation process.
static int generate_request (struct module_qstate *qstate, int id, uint8_t *name, size_t namelen, uint16_t qtype, uint16_t qclass)
 Generate a request for DNS data.
static int prime_trust_anchor (struct module_qstate *qstate, struct val_qstate *vq, int id, struct trust_anchor *toprime)
 Prime trust anchor for use.
static int validate_msg_signatures (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *key_entry)
 Validate if the ANSWER and AUTHORITY sections contain valid rrsets.
static void validate_positive_response (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *kkey)
 Given a "positive" response -- a response that contains an answer to the question, and no CNAME chain, validate this response.
static void validate_nodata_response (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *kkey)
 Validate a NOERROR/NODATA signed response -- a response that has a NOERROR Rcode but no ANSWER section RRsets.
static void validate_nameerror_response (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *kkey)
 Validate a NAMEERROR signed response -- a response that has a NXDOMAIN Rcode.
static void validate_referral_response (struct reply_info *chase_reply)
 Given a referral response, validate rrsets and take least trusted rrset as the current validation status.
static void validate_any_response (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *kkey)
 Given an "ANY" response -- a response that contains an answer to a qtype==ANY question, with answers.
static void validate_cname_response (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *kkey)
 Validate CNAME response, or DNAME+CNAME.
static void validate_cname_noanswer_response (struct module_env *env, struct val_env *ve, struct query_info *qchase, struct reply_info *chase_reply, struct key_entry_key *kkey)
 Validate CNAME NOANSWER response, no more data after a CNAME chain.
static int processInit (struct module_qstate *qstate, struct val_qstate *vq, struct val_env *ve, int id)
 Process init state for validator.
static int processFindKey (struct module_qstate *qstate, struct val_qstate *vq, int id)
 Process the FINDKEY state.
static int processValidate (struct module_qstate *qstate, struct val_qstate *vq, struct val_env *ve, int id)
 Process the VALIDATE stage, the init and findkey stages are finished, and the right keys are available to validate the response.
static int processFinished (struct module_qstate *qstate, struct val_qstate *vq, struct val_env *ve, int id)
 The Finished state.
static void val_handle (struct module_qstate *qstate, struct val_qstate *vq, struct val_env *ve, int id)
 Handle validator state.
void val_operate (struct module_qstate *qstate, enum module_ev event, int id, struct outbound_entry *outbound)
 validator operate on a query
static struct key_entry_keyprimeResponseToKE (int rcode, struct dns_msg *msg, struct trust_anchor *ta, struct module_qstate *qstate, int id)
 Evaluate the response to a priming request.
static int ds_response_to_ke (struct module_qstate *qstate, struct val_qstate *vq, int id, int rcode, struct dns_msg *msg, struct query_info *qinfo, struct key_entry_key **ke)
 In inform supers, with the resulting message and rcode and the current keyset in the super state, validate the DS response, returning a KeyEntry.
static void process_ds_response (struct module_qstate *qstate, struct val_qstate *vq, int id, int rcode, struct dns_msg *msg, struct query_info *qinfo)
 Process DS response.
static void process_dnskey_response (struct module_qstate *qstate, struct val_qstate *vq, int id, int rcode, struct dns_msg *msg, struct query_info *qinfo)
 Process DNSKEY response.
static void process_prime_response (struct module_qstate *qstate, struct val_qstate *vq, int id, int rcode, struct dns_msg *msg)
 Process prime response Sets the key entry in the state.
void val_inform_super (struct module_qstate *qstate, int id, struct module_qstate *super)
 inform validator super.
void val_clear (struct module_qstate *qstate, int id)
 validator cleanup query state
size_t val_get_mem (struct module_env *env, int id)
 Debug helper routine that assists worker in determining memory in use.
struct module_func_blockval_get_funcblock ()
 Get the validator function block.
const char * val_state_to_string (enum val_state state)
 Get validator state as a string.

Variables

static struct module_func_block val_block
 The validator function block.


Detailed Description

This file contains a module that performs validation of DNS queries.

According to RFC 4034.


Function Documentation

static int val_error ( struct module_qstate qstate,
int  id 
) [static]

Exit validation with an error status.

Parameters:
qstate,: query state
id,: validator id.
Returns:
false, for use by caller to return to stop processing.

References module_qstate::ext_state, module_error, and module_qstate::return_rcode.

Referenced by processFindKey(), processInit(), and processValidate().

static int needs_validation ( struct module_qstate qstate,
int  ret_rc,
struct dns_msg ret_msg 
) [static]

Check to see if a given response needs to go through the validation process.

Typical reasons for this routine to return false are: CD bit was on in the original request, the response was already validated, or the response is a kind of message that is unvalidatable (i.e., SERVFAIL, REFUSED, etc.)

Parameters:
qstate,: query state.
ret_rc,: rcode for this message (if noerror - examine ret_msg).
ret_msg,: return msg, can be NULL; look at rcode instead.
Returns:
true if the response could use validation (although this does not mean we can actually validate this response).

References BIT_CD, reply_info::flags, FLAGS_GET_RCODE, module_qstate::query_flags, dns_msg::rep, sec_status_bogus, reply_info::security, VERB_ALGO, and verbose().

Referenced by val_operate().

static int generate_request ( struct module_qstate qstate,
int  id,
uint8_t *  name,
size_t  namelen,
uint16_t  qtype,
uint16_t  qclass 
) [static]

Generate a request for DNS data.

Parameters:
qstate,: query state that is the parent.
id,: module id.
name,: what name to query for.
namelen,: length of name.
qtype,: query type.
qclass,: query class.
Returns:
false on alloc failure.

References module_env::attach_sub, BIT_CD, BIT_RD, module_qstate::env, module_qstate::ext_state, fptr_ok, fptr_whitelist_modenv_attach_sub(), log_err(), log_query_info(), module_wait_subquery, query_info::qclass, query_info::qname, query_info::qname_len, query_info::qtype, and VERB_ALGO.

Referenced by prime_trust_anchor(), and processFindKey().

static int prime_trust_anchor ( struct module_qstate qstate,
struct val_qstate vq,
int  id,
struct trust_anchor toprime 
) [static]

Prime trust anchor for use.

Generate and dispatch a priming query for the given trust anchor. The trust anchor can be DNSKEY or DS and does not have to be signed.

Parameters:
qstate,: query state.
vq,: validator query state.
id,: module id.
toprime,: what to prime.
Returns:
false on a processing error.

References trust_anchor::dclass, generate_request(), log_err(), trust_anchor::name, trust_anchor::namelen, and val_qstate::wait_prime_ta.

Referenced by processInit().

static int validate_msg_signatures ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key key_entry 
) [static]

Validate if the ANSWER and AUTHORITY sections contain valid rrsets.

They must be validly signed with the given key. Tries to validate ADDITIONAL rrsets as well, but only to check them. Allows unsigned CNAME after a DNAME that expands the DNAME.

Note that by the time this method is called, the process of finding the trusted DNSKEY rrset that signs this response must already have been completed.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to validate.
key_entry,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().
Returns:
false if any of the rrsets in the an or ns sections of the message fail to verify. The message is then set to bogus.

References reply_info::an_numrrsets, val_env::clean_additional, lruhash_entry::data, packed_rrset_key::dname, ub_packed_rrset_key::entry, log_nametypeclass(), reply_info::ns_numrrsets, query_info::qtype, ub_packed_rrset_key::rk, packed_rrset_key::rrset_class, rrset_trust_validated, reply_info::rrsets, sec_status_bogus, sec_status_secure, reply_info::security, packed_rrset_key::type, val_verify_rrset_entry(), and VERB_QUERY.

Referenced by processValidate().

static void validate_positive_response ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key kkey 
) [static]

Given a "positive" response -- a response that contains an answer to the question, and no CNAME chain, validate this response.

The answer and authority RRsets must already be verified as secure.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to that query to validate.
kkey,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().

References reply_info::an_numrrsets, packed_rrset_key::dname, log_nametypeclass(), reply_info::ns_numrrsets, nsec3_prove_wildcard(), ub_packed_rrset_key::rk, packed_rrset_key::rrset_class, reply_info::rrsets, sec_status_bogus, sec_status_insecure, sec_status_secure, reply_info::security, packed_rrset_key::type, val_nsec_proves_positive_wildcard(), val_rrset_wildcard(), VERB_ALGO, VERB_QUERY, and verbose().

Referenced by processValidate().

static void validate_nodata_response ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key kkey 
) [static]

Validate a NOERROR/NODATA signed response -- a response that has a NOERROR Rcode but no ANSWER section RRsets.

This consists of making certain that the authority section NSEC/NSEC3s proves that the qname does exist and the qtype doesn't.

The answer and authority RRsets must already be verified as secure.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to that query to validate.
kkey,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().

References reply_info::an_numrrsets, log_dns_msg(), reply_info::ns_numrrsets, nsec3_prove_nodata(), nsec_closest_encloser(), nsec_proves_nodata(), query_info::qname, query_dname_compare(), ub_packed_rrset_key::rk, reply_info::rrsets, sec_status_bogus, sec_status_insecure, sec_status_secure, reply_info::security, packed_rrset_key::type, val_nsec_proves_name_error(), VERB_ALGO, VERB_QUERY, verbose(), and verbosity.

Referenced by processValidate().

static void validate_nameerror_response ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key kkey 
) [static]

Validate a NAMEERROR signed response -- a response that has a NXDOMAIN Rcode.

This consists of making certain that the authority section NSEC proves that the qname doesn't exist and the covering wildcard also doesn't exist..

The answer and authority RRsets must have already been verified as secure.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to that query to validate.
kkey,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().

References reply_info::an_numrrsets, reply_info::ns_numrrsets, nsec3_prove_nameerror(), query_info::qname, query_info::qname_len, ub_packed_rrset_key::rk, reply_info::rrsets, sec_status_bogus, sec_status_secure, sec_status_to_string(), reply_info::security, packed_rrset_key::type, val_nsec_proves_name_error(), val_nsec_proves_no_wc(), VERB_ALGO, VERB_QUERY, and verbose().

Referenced by processValidate().

static void validate_referral_response ( struct reply_info chase_reply  )  [static]

Given a referral response, validate rrsets and take least trusted rrset as the current validation status.

Note that by the time this method is called, the process of finding the trusted DNSKEY rrset that signs this response must already have been completed.

Parameters:
chase_reply,: answer to validate.

References lruhash_entry::data, ub_packed_rrset_key::entry, reply_info::rrset_count, reply_info::rrsets, sec_status_secure, sec_status_to_string(), packed_rrset_data::security, reply_info::security, VERB_ALGO, and verbose().

Referenced by processValidate().

static void validate_any_response ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key kkey 
) [static]

Given an "ANY" response -- a response that contains an answer to a qtype==ANY question, with answers.

This does no checking that all types are present.

NOTE: it may be possible to get parent-side delegation point records here, which won't all be signed. Right now, this routine relies on the upstream iterative resolver to not return these responses -- instead treating them as referrals.

NOTE: RFC 4035 is silent on this issue, so this may change upon clarification. Clarification draft -05 says to not check all types are present.

Note that by the time this method is called, the process of finding the trusted DNSKEY rrset that signs this response must already have been completed.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to that query to validate.
kkey,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().

References reply_info::an_numrrsets, packed_rrset_key::dname, log_err(), log_nametypeclass(), reply_info::ns_numrrsets, nsec3_prove_wildcard(), query_info::qtype, ub_packed_rrset_key::rk, packed_rrset_key::rrset_class, reply_info::rrsets, sec_status_bogus, sec_status_insecure, sec_status_secure, reply_info::security, packed_rrset_key::type, val_nsec_proves_positive_wildcard(), val_rrset_wildcard(), VERB_ALGO, VERB_QUERY, and verbose().

Referenced by processValidate().

static void validate_cname_response ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key kkey 
) [static]

Validate CNAME response, or DNAME+CNAME.

This is just like a positive proof, except that this is about a DNAME+CNAME. Possible wildcard proof. Difference with positive proof is that this routine refuses wildcarded DNAMEs.

The answer and authority rrsets must already be verified as secure.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to that query to validate.
kkey,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().

References reply_info::an_numrrsets, packed_rrset_key::dname, log_nametypeclass(), reply_info::ns_numrrsets, nsec3_prove_wildcard(), query_info::qtype, ub_packed_rrset_key::rk, packed_rrset_key::rrset_class, reply_info::rrsets, sec_status_bogus, sec_status_insecure, sec_status_secure, reply_info::security, packed_rrset_key::type, val_nsec_proves_positive_wildcard(), val_rrset_wildcard(), VERB_ALGO, VERB_QUERY, and verbose().

Referenced by processValidate().

static void validate_cname_noanswer_response ( struct module_env env,
struct val_env ve,
struct query_info qchase,
struct reply_info chase_reply,
struct key_entry_key kkey 
) [static]

Validate CNAME NOANSWER response, no more data after a CNAME chain.

This can be a NODATA or a NAME ERROR case, but not both at the same time. We don't know because the rcode has been set to NOERROR by the CNAME.

The answer and authority rrsets must already be verified as secure.

Parameters:
env,: module env for verify.
ve,: validator env for verify.
qchase,: query that was made.
chase_reply,: answer to that query to validate.
kkey,: the key entry, which is trusted, and which matches the signer of the answer. The key entry isgood().

References reply_info::an_numrrsets, log_dns_msg(), reply_info::ns_numrrsets, nsec3_prove_nxornodata(), nsec_closest_encloser(), nsec_proves_nodata(), query_info::qname, query_info::qname_len, query_dname_compare(), ub_packed_rrset_key::rk, reply_info::rrsets, sec_status_bogus, sec_status_insecure, sec_status_secure, reply_info::security, packed_rrset_key::type, val_nsec_proves_name_error(), val_nsec_proves_no_wc(), VERB_ALGO, VERB_QUERY, verbose(), and verbosity.

Referenced by processValidate().

static int processInit ( struct module_qstate qstate,
struct val_qstate vq,
struct val_env ve,
int  id 
) [static]

Process init state for validator.

Process the INIT state. First tier responses start in the INIT state. This is where they are vetted for validation suitability, and the initial key search is done.

Currently, events the come through this routine will be either promoted to FINISHED/CNAME_RESP (no validation needed), FINDKEY (next step to validation), or will be (temporarily) retired and a new priming request event will be generated.

Parameters:
qstate,: query state.
vq,: validator query state.
ve,: validator shared global environment.
id,: module id.
Returns:
true if the event should be processed further on return, false if not.

References module_env::anchors, anchors_lookup(), val_qstate::chase_reply, dname_remove_label(), dname_strict_subdomain_c(), val_qstate::ds_rrset, val_qstate::empty_DS_name, module_qstate::env, packed_rrset_key::flags, val_env::kcache, key_cache_obtain(), val_qstate::key_entry, key_entry_isnull(), log_dns_msg(), log_nametypeclass(), key_entry_key::name, trust_anchor::name, module_env::now, val_qstate::orig_msg, PACKED_RRSET_NSEC_AT_APEX, trust_anchor::parent, prime_trust_anchor(), val_qstate::qchase, query_info::qclass, module_qstate::qinfo, query_info::qname, query_info::qname_len, query_info::qtype, module_qstate::query_flags, module_qstate::region, dns_msg::rep, ub_packed_rrset_key::rk, module_env::rrset_cache, reply_info::rrset_count, val_qstate::rrset_skip, reply_info::rrsets, sec_status_indeterminate, sec_status_insecure, reply_info::security, val_qstate::signer_len, val_qstate::signer_name, val_qstate::state, val_qstate::trust_anchor, packed_rrset_key::type, VAL_CLASS_CNAME, VAL_CLASS_NAMEERROR, VAL_CLASS_REFERRAL, val_classification_to_string(), val_classify_response(), val_error(), val_fill_reply(), val_find_signer(), VAL_FINDKEY_STATE, VAL_FINISHED_STATE, val_mark_indeterminate(), val_mark_insecure(), VERB_ALGO, VERB_DETAIL, VERB_QUERY, verbose(), and verbosity.

Referenced by val_handle().

static int processFindKey ( struct module_qstate qstate,
struct val_qstate vq,
int  id 
) [static]

Process the FINDKEY state.

Generally this just calculates the next name to query and either issues a DS or a DNSKEY query. It will check to see if the correct key has already been reached, in which case it will advance the event to the next state.

Parameters:
qstate,: query state.
vq,: validator query state.
id,: module id.
Returns:
true if the event should be processed further on return, false if not.

References val_qstate::chase_reply, packed_rrset_key::dname, dname_count_labels(), packed_rrset_key::dname_len, dname_remove_labels(), dname_subdomain_c(), val_qstate::ds_rrset, val_qstate::empty_DS_len, val_qstate::empty_DS_name, generate_request(), val_qstate::key_entry, key_entry_isbad(), key_entry_isnull(), log_assert, log_err(), log_nametypeclass(), log_query_info(), key_entry_key::name, key_entry_key::namelen, val_qstate::qchase, query_info::qclass, query_info::qname, query_info::qname_len, query_dname_compare(), ub_packed_rrset_key::rk, sec_status_bogus, reply_info::security, val_qstate::signer_len, val_qstate::signer_name, val_qstate::state, val_error(), VAL_FINISHED_STATE, VAL_VALIDATE_STATE, VERB_ALGO, and verbose().

Referenced by val_handle().

static int processValidate ( struct module_qstate qstate,
struct val_qstate vq,
struct val_env ve,
int  id 
) [static]

Process the VALIDATE stage, the init and findkey stages are finished, and the right keys are available to validate the response.

Or, there are no keys available, in order to invalidate the response.

After validation, the status is recorded in the message and rrsets, and finished state is started.

Parameters:
qstate,: query state.
vq,: validator query state.
ve,: validator shared global environment.
id,: module id.
Returns:
true if the event should be processed further on return, false if not.

References val_qstate::chase_reply, module_qstate::env, key_entry_key::key_class, val_qstate::key_entry, key_entry_isbad(), key_entry_isnull(), log_err(), log_nametypeclass(), log_query_info(), key_entry_key::name, val_qstate::orig_msg, val_qstate::qchase, module_qstate::qinfo, module_qstate::query_flags, dns_msg::rep, module_env::rrset_cache, val_qstate::rrset_skip, sec_status_bogus, sec_status_insecure, sec_status_to_string(), reply_info::security, val_qstate::signer_name, val_qstate::state, VAL_CLASS_ANY, VAL_CLASS_CNAME, VAL_CLASS_CNAMENOANSWER, VAL_CLASS_NAMEERROR, VAL_CLASS_NODATA, VAL_CLASS_POSITIVE, VAL_CLASS_REFERRAL, val_classify_response(), val_error(), VAL_FINISHED_STATE, val_mark_insecure(), validate_any_response(), validate_cname_noanswer_response(), validate_cname_response(), validate_msg_signatures(), validate_nameerror_response(), validate_nodata_response(), validate_positive_response(), validate_referral_response(), VERB_ALGO, VERB_DETAIL, and verbose().

Referenced by val_handle().

static int processFinished ( struct module_qstate qstate,
struct val_qstate vq,
struct val_env ve,
int  id 
) [static]

static void val_handle ( struct module_qstate qstate,
struct val_qstate vq,
struct val_env ve,
int  id 
) [static]

Handle validator state.

If a method returns true, the next state is started. If false, then processing will stop.

Parameters:
qstate,: query state.
vq,: validator query state.
ve,: validator shared global environment.
id,: module id.

References log_warn(), processFindKey(), processFinished(), processInit(), processValidate(), val_qstate::state, VAL_FINDKEY_STATE, VAL_FINISHED_STATE, VAL_INIT_STATE, val_state_to_string(), VAL_VALIDATE_STATE, VERB_ALGO, and verbose().

Referenced by val_operate().

static struct key_entry_key* primeResponseToKE ( int  rcode,
struct dns_msg msg,
struct trust_anchor ta,
struct module_qstate qstate,
int  id 
) [static, read]

Evaluate the response to a priming request.

Parameters:
rcode,: rcode return value.
msg,: message return value (allocated in a the wrong region).
ta,: trust anchor.
qstate,: qstate that needs key.
id,: module id.
Returns:
new key entry or NULL on allocation failure. The key entry will either contain a validated DNSKEY rrset, or represent a Null key (query failed, but validation did not), or a Bad key (validation failed).

References module_env::cfg, trust_anchor::dclass, trust_anchor::dnskey_rrset, trust_anchor::ds_rrset, module_qstate::env, config_file::harden_dnssec_stripped, val_env::kcache, key_cache_insert(), key_entry_create_bad(), key_entry_create_null(), key_entry_create_rrset(), key_entry_isgood(), log_err(), log_nametypeclass(), module_env::modinfo, trust_anchor::name, trust_anchor::namelen, module_env::now, NULL_KEY_TTL, module_qstate::region, dns_msg::rep, reply_find_rrset_section_an(), sec_status_bogus, sec_status_secure, sec_status_to_string(), sec_status_unchecked, val_verify_new_DNSKEYs(), val_verify_rrset(), VERB_DETAIL, VERB_OPS, and verbose().

Referenced by process_prime_response().

static int ds_response_to_ke ( struct module_qstate qstate,
struct val_qstate vq,
int  id,
int  rcode,
struct dns_msg msg,
struct query_info qinfo,
struct key_entry_key **  ke 
) [static]

In inform supers, with the resulting message and rcode and the current keyset in the super state, validate the DS response, returning a KeyEntry.

Parameters:
qstate,: query state that is validating and asked for a DS.
vq,: validator query state
id,: module id.
rcode,: rcode result value.
msg,: result message (if rcode is OK).
qinfo,: from the sub query state, query info.
ke,: the key entry to return. It returns is_bad if the DS response fails to validate, is_null if the DS response indicated an end to secure space, is_good if the DS validated. It returns ke=NULL if the DS response indicated that the request wasn't a delegation point.
Returns:
0 on servfail error (malloc failure).

References reply_info::an_numrrsets, BIT_RD, module_qstate::env, val_qstate::key_entry, key_entry_create_bad(), key_entry_create_null(), key_entry_create_rrset(), log_assert, log_query_info(), log_warn(), module_env::modinfo, module_env::now, reply_info::ns_numrrsets, nsec3_prove_nods(), query_info::qclass, query_info::qname, query_info::qname_len, module_qstate::region, dns_msg::rep, reply_find_answer_rrset(), reply_info::rrsets, sec_status_bogus, sec_status_indeterminate, sec_status_insecure, sec_status_secure, sec_status_unchecked, ub_packed_rrset_ttl(), VAL_CLASS_NAMEERROR, VAL_CLASS_NODATA, VAL_CLASS_POSITIVE, val_classification_to_string(), val_classify_response(), val_dsset_isusable(), val_nsec_prove_nodata_dsreply(), val_verify_rrset_entry(), VERB_DETAIL, VERB_QUERY, and verbose().

Referenced by process_ds_response().

static void process_ds_response ( struct module_qstate qstate,
struct val_qstate vq,
int  id,
int  rcode,
struct dns_msg msg,
struct query_info qinfo 
) [static]

Process DS response.

Called from inform_supers. Because it is in inform_supers, the mesh itself is busy doing callbacks for a state that is to be deleted soon; don't touch the mesh; instead set a state in the super, as the super will be reactivated soon. Perform processing to determine what state to set in the super.

Parameters:
qstate,: query state that is validating and asked for a DS.
vq,: validator query state
id,: module id.
rcode,: rcode result value.
msg,: result message (if rcode is OK).
qinfo,: from the sub query state, query info.

References ds_response_to_ke(), val_qstate::ds_rrset, val_qstate::empty_DS_len, val_qstate::empty_DS_name, val_qstate::key_entry, key_entry_get_rrset(), key_entry_isgood(), log_err(), query_info::qname, query_info::qname_len, module_qstate::region, regional_alloc_init(), val_qstate::state, and VAL_VALIDATE_STATE.

Referenced by val_inform_super().

static void process_dnskey_response ( struct module_qstate qstate,
struct val_qstate vq,
int  id,
int  rcode,
struct dns_msg msg,
struct query_info qinfo 
) [static]

Process DNSKEY response.

Called from inform_supers. Sets the key entry in the state. Because it is in inform_supers, the mesh itself is busy doing callbacks for a state that is to be deleted soon; don't touch the mesh; instead set a state in the super, as the super will be reactivated soon. Perform processing to determine what state to set in the super.

Parameters:
qstate,: query state that is validating and asked for a DNSKEY.
vq,: validator query state
id,: module id.
rcode,: rcode result value.
msg,: result message (if rcode is OK).
qinfo,: from the sub query state, query info.

References val_qstate::ds_rrset, module_qstate::env, val_env::kcache, key_cache_insert(), val_qstate::key_entry, key_entry_create_bad(), key_entry_isbad(), key_entry_isgood(), log_err(), log_query_info(), module_env::modinfo, query_info::qclass, query_info::qname, query_info::qname_len, module_qstate::region, dns_msg::rep, reply_find_answer_rrset(), val_qstate::state, VAL_VALIDATE_STATE, val_verify_new_DNSKEYs(), VERB_DETAIL, and verbose().

Referenced by val_inform_super().

static void process_prime_response ( struct module_qstate qstate,
struct val_qstate vq,
int  id,
int  rcode,
struct dns_msg msg 
) [static]

Process prime response Sets the key entry in the state.

Parameters:
qstate,: query state that is validating and primed a trust anchor.
vq,: validator query state
id,: module id.
rcode,: rcode result value.
msg,: result message (if rcode is OK).

References val_qstate::key_entry, key_entry_isbad(), key_entry_isnull(), primeResponseToKE(), val_qstate::state, val_qstate::trust_anchor, and VAL_VALIDATE_STATE.

Referenced by val_inform_super().

void val_inform_super ( struct module_qstate qstate,
int  id,
struct module_qstate super 
)

size_t val_get_mem ( struct module_env env,
int  id 
)

Debug helper routine that assists worker in determining memory in use.

Parameters:
env,: module environment
id,: module id.
Returns:
memory in use in bytes.

References module_env::anchors, anchors_get_mem(), val_env::kcache, key_cache_get_mem(), module_env::modinfo, and val_env::nsec3_keyiter_count.

Referenced by fptr_whitelist_mod_get_mem().

struct module_func_block* val_get_funcblock (  )  [read]

Get the validator function block.

Returns:
: function block with function pointers to validator methods.

Referenced by checkconf(), and module_factory().

const char* val_state_to_string ( enum val_state  state  ) 

Get validator state as a string.

Parameters:
state,: to convert
Returns:
constant string that is printable.

References VAL_FINDKEY_STATE, VAL_FINISHED_STATE, VAL_INIT_STATE, and VAL_VALIDATE_STATE.

Referenced by val_handle().


Variable Documentation

struct module_func_block val_block [static]

Initial value:

The validator function block.


Generated on Sun Sep 21 16:24:57 2008 for unbound by  doxygen 1.5.6