dns64.h File Reference

This file contains a module that performs DNS64 query processing. More...

#include "util/module.h"

Functions
struct module_func_block *	dns64_get_funcblock (void)
	Get the dns64 function block.
int	dns64_init (struct module_env *env, int id)
	dns64 init
void	dns64_deinit (struct module_env *env, int id)
	dns64 deinit
void	dns64_operate (struct module_qstate *qstate, enum module_ev event, int id, struct outbound_entry *outbound)
	dns64 operate on a query
void	dns64_inform_super (struct module_qstate *qstate, int id, struct module_qstate *super)
	This function is called when a sub-query finishes to inform the parent query.
void	dns64_clear (struct module_qstate *qstate, int id)
	dns64 cleanup query state
size_t	dns64_get_mem (struct module_env *env, int id)
	dns64 alloc size routine

Detailed Description

This file contains a module that performs DNS64 query processing.

Function Documentation

dns64_get_funcblock()

struct module_func_block * dns64_get_funcblock

(

void

)

Get the dns64 function block.

Returns

: function block with function pointers to dns64 methods.

Get the dns64 function block.

References dns64_block.

Referenced by module_funcs_avail().

dns64_init()

int dns64_init	(	struct module_env *	env,
		int	id
	)

dns64 init

dns64 init

Parameters

env	Global state of all module instances.
id	This instance's ID number.

References module_env::cfg, dns64_apply_cfg(), dns64_env::ignore_aaaa, log_err(), module_env::modinfo, and name_tree_init().

Referenced by fptr_whitelist_mod_init().

dns64_deinit()

void dns64_deinit	(	struct module_env *	env,
		int	id
	)

dns64 deinit

dns64 deinit

Parameters

env	Global state of all module instances.
id	This instance's ID number.

References free_ignore_aaaa_node(), dns64_env::ignore_aaaa, module_env::modinfo, and traverse_postorder().

Referenced by fptr_whitelist_mod_deinit().

dns64_operate()

void dns64_operate	(	struct module_qstate *	qstate,
		enum module_ev	event,
		int	id,
		struct outbound_entry *	outbound
	)

dns64 operate on a query

dns64 operate on a query

It gets called each time a query receives an event which we may need to handle. We respond by updating the state of the query.

Parameters

qstate	Structure containing the state of the query.
event	Event that has just been received.
id	This module's instance ID.
outbound	State of a DNS query on an authoritative server. We never do our own queries ourselves (other modules do it for us), so this is unused.

References DNS64_INTERNAL_QUERY, DNS64_NEW_QUERY, module_qstate::ext_state, handle_event_moddone(), handle_event_pass(), log_err(), log_query_info(), module_qstate::minfo, module_error, module_event_moddone, module_event_new, module_event_pass, module_finished, module_qstate::no_cache_store, module_qstate::qinfo, module_qstate::region, regional_alloc(), dns64_qstate::started_no_cache_store, dns64_qstate::state, strextstate(), strmodulevent(), VERB_QUERY, and verbose().

Referenced by fptr_whitelist_mod_operate().

dns64_inform_super()

void dns64_inform_super	(	struct module_qstate *	qstate,
		int	id,
		struct module_qstate *	super
	)

This function is called when a sub-query finishes to inform the parent query.

We issue two kinds of sub-queries: PTR and A.

Parameters

qstate	State of the sub-query.
id	This module's instance ID.
super	State of the super-query.

References dns64_adjust_a(), dns64_adjust_ptr(), DNS64_INTERNAL_QUERY, DNS64_SUBQUERY_FINISHED, dns_cache_store(), module_qstate::env, module_qstate::is_valrec, LDNS_RR_TYPE_A, LDNS_RR_TYPE_PTR, log_assert, log_err(), log_query_info(), module_qstate::minfo, module_qstate::no_cache_store, module_qstate::prefetch_leeway, module_qstate::qinfo, module_qstate::qstarttime, query_info::qtype, module_qstate::query_flags, module_qstate::region, regional_alloc(), dns_msg::rep, reply_find_answer_rrset(), module_qstate::return_msg, module_qstate::return_rcode, dns64_qstate::started_no_cache_store, dns64_qstate::state, and VERB_ALGO.

Referenced by fptr_whitelist_mod_inform_super().

dns64_clear()

void dns64_clear	(	struct module_qstate *	qstate,
		int	id
	)

dns64 cleanup query state

dns64 cleanup query state

Since we do not allocate memory, it's just a matter of setting a pointer to NULL.

Parameters

qstate	Query state.
id	This module's instance ID.

References module_qstate::minfo.

Referenced by fptr_whitelist_mod_clear().

dns64_get_mem()

size_t dns64_get_mem	(	struct module_env *	env,
		int	id
	)

dns64 alloc size routine

dns64 alloc size routine

Parameters

env	Module environment.
id	This module's instance ID.

References module_env::modinfo.

Referenced by fptr_whitelist_mod_get_mem().