module.c File Reference

Implementation of module.h. More...

#include "config.h"
#include "util/module.h"
#include "sldns/wire2str.h"
#include "util/config_file.h"
#include "util/regional.h"
#include "util/data/dname.h"
#include "util/net_help.h"

Functions
const char *	strextstate (enum module_ext_state s)
	Debug utility: module external qstate to string.
const char *	strmodulevent (enum module_ev e)
	Debug utility: module event to string.
void	errinf (struct module_qstate *qstate, const char *str)
	Append text to the error info for validation.
void	errinf_ede (struct module_qstate *qstate, const char *str, sldns_ede_code reason_bogus)
void	errinf_origin (struct module_qstate *qstate, struct sock_list *origin)
	Append text to error info: from 1.2.3.4.
char *	errinf_to_str_bogus (struct module_qstate *qstate, struct regional *region)
	Create error info in string.
sldns_ede_code	errinf_to_reason_bogus (struct module_qstate *qstate)
	Check the sldns_ede_code of the qstate->errinf.
char *	errinf_to_str_servfail (struct module_qstate *qstate)
	Create error info in string.
char *	errinf_to_str_misc (struct module_qstate *qstate)
	Create error info in string.
void	errinf_rrset (struct module_qstate *qstate, struct ub_packed_rrset_key *rr)
	Append text to error info: for RRset name type class.
void	errinf_dname (struct module_qstate *qstate, const char *str, uint8_t *dname)
	Append text to error info: str dname.
int	edns_known_options_init (struct module_env *env)
	Initialize the edns known options by allocating the required space.
void	edns_known_options_delete (struct module_env *env)
	Free the allocated space for the known edns options.
int	edns_register_option (uint16_t opt_code, int bypass_cache_stage, int no_aggregation, struct module_env *env)
	Register a known edns option.
int	inplace_cb_register (void *cb, enum inplace_cb_list_type type, void *cbarg, struct module_env *env, int id)
	Register an inplace callback function.
void	inplace_cb_delete (struct module_env *env, enum inplace_cb_list_type type, int id)
	Delete callback for specified type and module id.
struct edns_known_option *	edns_option_is_known (uint16_t opt_code, struct module_env *env)
	Check if an edns option is known.
int	edns_bypass_cache_stage (struct edns_option *list, struct module_env *env)
	Check if an edns option needs to bypass the reply from cache stage.
int	unique_mesh_state (struct edns_option *list, struct module_env *env)
	Check if an unique mesh state is required.
void	log_edns_known_options (enum verbosity_value level, struct module_env *env)
	Log the known edns options.
void	copy_state_to_super (struct module_qstate *qstate, int ATTR_UNUSED(id), struct module_qstate *super)

Detailed Description

Implementation of module.h.

Function Documentation

strextstate()

const char * strextstate

(

enum module_ext_state

s

)

Debug utility: module external qstate to string.

Parameters

s	the state value.

Returns

descriptive string.

References module_error, module_finished, module_restart_next, module_state_initial, module_wait_module, module_wait_reply, and module_wait_subquery.

Referenced by dns64_operate(), get_mesh_status(), ipset_operate(), iter_operate(), mesh_run(), and val_operate().

strmodulevent()

const char * strmodulevent

(

enum module_ev

e

)

Debug utility: module event to string.

Parameters

e	the module event value.

Returns

descriptive string.

References module_event_capsfail, module_event_error, module_event_moddone, module_event_new, module_event_noreply, module_event_pass, and module_event_reply.

Referenced by dns64_operate(), ipset_operate(), iter_operate(), pymod::setTTL(), pymod_thread::setTTL(), and val_operate().

errinf()

void errinf	(	struct module_qstate *	qstate,
		const char *	str
	)

Append text to the error info for validation.

Parameters

qstate	query state.
str	copied into query region and appended. Failures to allocate are logged.

Referenced by auth_zone_delegpt(), ds_response_to_ke(), errinf_dname(), errinf_origin(), errinf_reply(), errinf_rrset(), iter_operate(), prime_stub(), process_response(), processCollectClass(), processDSNSResponse(), processFinished(), processInit(), processInitRequest(), processInitRequest2(), processLastResort(), processPrimeResponse(), processQueryResponse(), processQueryTargets(), processValidate(), validate_msg_signatures(), and validate_suspend_setup_timer().

errinf_origin()

void errinf_origin	(	struct module_qstate *	qstate,
		struct sock_list *	origin
	)

Append text to error info: from 1.2.3.4.

Parameters

qstate	query state.
origin	sock list with origin of trouble. Every element added. If NULL: nothing is added. if 0len element: 'from cache' is added.

References sock_list::addr, addr_to_str(), module_env::cfg, module_qstate::env, errinf(), sock_list::len, config_file::log_servfail, sock_list::next, and config_file::val_log_level.

Referenced by process_dnskey_response(), process_ds_response(), process_prime_response(), processFindKey(), processValidate(), and validate_msg_signatures().

errinf_to_str_bogus()

char * errinf_to_str_bogus	(	struct module_qstate *	qstate,
		struct regional *	region
	)

Create error info in string.

For validation failures.

Parameters

qstate	query state.
region	the region for the result or NULL for malloced result.

Returns

string or NULL on malloc failure (already logged). This string is malloced if region is NULL and has to be freed by caller.

References dname_str(), module_qstate::errinf, LDNS_MAX_DOMAINLEN, log_err(), errinf_strlist::next, query_info::qclass, module_qstate::qinfo, query_info::qname, query_info::qtype, regional_strdup(), sldns_wire2str_class_buf(), sldns_wire2str_type_buf(), and errinf_strlist::str.

Referenced by mesh_do_callback(), and processFinished().

errinf_to_reason_bogus()

sldns_ede_code errinf_to_reason_bogus

(

struct module_qstate *

qstate

)

Check the sldns_ede_code of the qstate->errinf.

Parameters

qstate

query state.

Returns

the latest explicitly set sldns_ede_code or LDNS_EDE_NONE.

References module_qstate::errinf, errinf_strlist::next, and errinf_strlist::reason_bogus.

Referenced by processFinished().

errinf_to_str_servfail()

char * errinf_to_str_servfail

(

struct module_qstate *

qstate

)

Create error info in string.

For other servfails.

Parameters

qstate

query state.

Returns

string or NULL on malloc failure (already logged).

References dname_str(), module_qstate::errinf, LDNS_MAX_DOMAINLEN, log_err(), errinf_strlist::next, query_info::qclass, module_qstate::qinfo, query_info::qname, query_info::qtype, module_qstate::region, regional_strdup(), sldns_wire2str_class_buf(), sldns_wire2str_type_buf(), and errinf_strlist::str.

Referenced by mesh_query_done().

errinf_to_str_misc()

char * errinf_to_str_misc

(

struct module_qstate *

qstate

)

Create error info in string.

For misc failures that are not servfail.

Parameters

qstate

query state.

Returns

string or NULL on malloc failure (already logged).

References module_qstate::errinf, log_err(), errinf_strlist::next, module_qstate::region, regional_strdup(), and errinf_strlist::str.

Referenced by ds_response_to_ke(), primeResponseToKE(), process_dnskey_response(), and processFinished().

errinf_rrset()

void errinf_rrset	(	struct module_qstate *	qstate,
		struct ub_packed_rrset_key *	rr
	)

Append text to error info: for RRset name type class.

Parameters

qstate	query state.
rr	rrset_key.

References module_env::cfg, packed_rrset_key::dname, dname_str(), module_qstate::env, errinf(), LDNS_MAX_DOMAINLEN, config_file::log_servfail, ub_packed_rrset_key::rk, packed_rrset_key::rrset_class, sldns_wire2str_class_buf(), sldns_wire2str_type_buf(), packed_rrset_key::type, and config_file::val_log_level.

Referenced by validate_msg_signatures().

errinf_dname()

void errinf_dname	(	struct module_qstate *	qstate,
		const char *	str,
		uint8_t *	dname
	)

Append text to error info: str dname.

Parameters

qstate	query state.
str	explanation string
dname	the dname.

References module_env::cfg, dname_str(), module_qstate::env, errinf(), LDNS_MAX_DOMAINLEN, config_file::log_servfail, errinf_strlist::str, and config_file::val_log_level.

Referenced by process_dnskey_response(), process_ds_response(), process_prime_response(), processDSNSFind(), processInit(), processInitRequest(), processLastResort(), processPrimeResponse(), processQueryResponse(), and processQueryTargets().

edns_known_options_init()

int edns_known_options_init

(

struct module_env *

env

)

Initialize the edns known options by allocating the required space.

Parameters

env	the module environment.

Returns

false on failure (no memory).

References module_env::edns_known_options, and MAX_KNOWN_EDNS_OPTS.

Referenced by check_mod(), daemon_init(), and ub_ctx_create_nopipe().

edns_known_options_delete()

void edns_known_options_delete

(

struct module_env *

env

)

Free the allocated space for the known edns options.

Parameters

env	the module environment.

References module_env::edns_known_options.

Referenced by check_mod(), daemon_delete(), daemon_init(), ub_ctx_create(), ub_ctx_create_nopipe(), and ub_ctx_delete().

edns_register_option()

int edns_register_option	(	uint16_t	opt_code,
		int	bypass_cache_stage,
		int	no_aggregation,
		struct module_env *	env
	)

Register a known edns option.

Overwrite the flags if it is already registered. Used before creating workers to register known edns options.

Parameters

opt_code	the edns option code.
bypass_cache_stage	whether the option interacts with the cache.
no_aggregation	whether the option implies more specific aggregation.
env	the module environment.

Returns

true on success, false on failure (registering more options than allowed or trying to register after the environment is copied to the threads.)

Checking if we are full first is faster but it does not provide the option to change the flags when the array is full. It only impacts unbound initialization, leave it for now.

References edns_known_option::bypass_cache_stage, module_env::edns_known_options, log_err(), MAX_KNOWN_EDNS_OPTS, edns_known_option::no_aggregation, edns_known_option::opt_code, and module_env::worker.

inplace_cb_register()

int inplace_cb_register	(	void *	cb,
		enum inplace_cb_list_type	type,
		void *	cbarg,
		struct module_env *	env,
		int	id
	)

Register an inplace callback function.

Parameters

cb	pointer to the callback function.
type	inplace callback type.
cbarg	argument for the callback function, or NULL.
env	the module environment.
id	module id.

Returns

true on success, false on failure (out of memory or trying to register after the environment is copied to the threads.)

References inplace_cb::cb, inplace_cb::id, log_err(), and module_env::worker.

inplace_cb_delete()

void inplace_cb_delete	(	struct module_env *	env,
		enum inplace_cb_list_type	type,
		int	id
	)

Delete callback for specified type and module id.

Parameters

env	the module environment.
type	inplace callback type.
id	module id.

References inplace_cb::id, and inplace_cb::next.

Referenced by pythonmod_deinit().

edns_option_is_known()

struct edns_known_option * edns_option_is_known	(	uint16_t	opt_code,
		struct module_env *	env
	)

Check if an edns option is known.

Parameters

opt_code	the edns option code.
env	the module environment.

Returns

pointer to registered option if the edns option is known, NULL otherwise.

References module_env::edns_known_options, and edns_known_option::opt_code.

edns_bypass_cache_stage()

int edns_bypass_cache_stage	(	struct edns_option *	list,
		struct module_env *	env
	)

Check if an edns option needs to bypass the reply from cache stage.

Parameters

list	the edns options.
env	the module environment.

Returns

true if an edns option needs to bypass the cache stage, false otherwise.

References edns_known_option::bypass_cache_stage, module_env::edns_known_options, edns_option::next, edns_option::opt_code, and edns_known_option::opt_code.

Referenced by worker_handle_request().

unique_mesh_state()

int unique_mesh_state	(	struct edns_option *	list,
		struct module_env *	env
	)

Check if an unique mesh state is required.

Might be triggered by EDNS option or set for the complete env.

Parameters

list	the edns options.
env	the module environment.

Returns

true if an edns option needs a unique mesh state, false otherwise.

References module_env::edns_known_options, edns_option::next, edns_known_option::no_aggregation, edns_option::opt_code, and edns_known_option::opt_code.

Referenced by mesh_new_callback(), and mesh_new_client().

log_edns_known_options()

void log_edns_known_options	(	enum verbosity_value	level,
		struct module_env *	env
	)

Log the known edns options.

Parameters

level	the desired verbosity level.
env	the module environment.

References edns_known_option::bypass_cache_stage, module_env::edns_known_options, edns_known_option::no_aggregation, edns_known_option::opt_code, sldns_wire2str_edns_option_code_print(), verbose(), and verbosity.

Referenced by context_finalize(), and daemon_setup_modules().