pythonmod_utils.c File Reference

Utility functions for the python module that perform stores and loads and conversions. More...

#include "config.h"
#include "pythonmod/pythonmod_utils.h"
#include "util/module.h"
#include "util/netevent.h"
#include "util/net_help.h"
#include "services/cache/dns.h"
#include "services/cache/rrset.h"
#include "util/data/msgparse.h"
#include "util/data/msgreply.h"
#include "util/storage/slabhash.h"
#include "util/regional.h"
#include "iterator/iter_delegpt.h"
#include "sldns/sbuffer.h"
#include <Python.h>

Functions
int	storeQueryInCache (struct module_qstate *qstate, struct query_info *qinfo, struct reply_info *msgrep, int is_referral)
	Store the reply_info and query_info pair in message cache (qstate->msg_cache).
void	invalidateQueryInCache (struct module_qstate *qstate, struct query_info *qinfo)
	Invalidate the message associated with query_info stored in message cache.
int	createResponse (struct module_qstate *qstate, sldns_buffer *pkt)
	Create response according to the ldns packet content.
void	reply_addr2str (struct comm_reply *reply, char *dest, int maxlen)
	Convert reply->addr to string.
void	delegpt_addr_addr2str (struct delegpt_addr *target, char *dest, int maxlen)
	Convert target->addr to string.

Detailed Description

Utility functions for the python module that perform stores and loads and conversions.

Function Documentation

storeQueryInCache()

int storeQueryInCache	(	struct module_qstate *	qstate,
		struct query_info *	qinfo,
		struct reply_info *	msgrep,
		int	is_referral
	)

Store the reply_info and query_info pair in message cache (qstate->msg_cache).

Parameters

qstate	module environment
qinfo	query info, the query for which answer is stored.
msgrep	reply in dns_msg
is_referral	If true, then the given message to be stored is a referral. The cache implementation may use this as a hint. It will store only the RRsets, not the message.

Returns

0 on alloc error (out of memory).

References reply_info::authoritative, dns_cache_store(), module_qstate::env, module_qstate::is_valrec, module_qstate::prefetch_leeway, module_qstate::qstarttime, and module_qstate::query_flags.

invalidateQueryInCache()

void invalidateQueryInCache	(	struct module_qstate *	qstate,
		struct query_info *	qinfo
	)

Invalidate the message associated with query_info stored in message cache.

This function invalidates the record in message cache associated with the given query only if such a record exists.

Parameters

qstate	module environment
qinfo	query info, the query for which answer is stored.

References packed_rrset_data::count, lruhash_entry::data, ub_packed_rrset_key::entry, module_qstate::env, rrset_ref::key, lruhash_entry::lock, log_info(), module_env::msg_cache, module_env::now, module_qstate::query_flags, query_info_hash(), reply_info::ref, packed_rrset_data::rr_ttl, rrset_array_lock(), rrset_array_unlock(), reply_info::rrset_count, packed_rrset_data::rrsig_count, slabhash_lookup(), reply_info::ttl, and packed_rrset_data::ttl.

createResponse()

int createResponse	(	struct module_qstate *	qstate,
		struct sldns_buffer *	pkt
	)

Create response according to the ldns packet content.

This function fills qstate.return_msg up with data of a given packet

Parameters

qstate	module environment
pkt	a sldns_buffer which contains sldns_packet data

Returns

0 on failure, out of memory or parse error.

References module_qstate::env, msg_parse::flags, log_dns_msg(), log_err(), parse_create_msg(), parse_extract_edns_from_response_msg(), parse_packet(), dns_msg::qinfo, module_qstate::region, regional_alloc(), dns_msg::rep, module_qstate::return_msg, module_env::scratch, sldns_buffer_set_position(), VERB_ALGO, verbose(), and verbosity.

reply_addr2str()

void reply_addr2str	(	struct comm_reply *	reply,
		char *	dest,
		int	maxlen
	)

Convert reply->addr to string.

Parameters

reply	comm reply with address in it.
dest	destination string.
maxlen	length of string buffer.

References comm_reply::client_addr.

delegpt_addr_addr2str()

void delegpt_addr_addr2str	(	struct delegpt_addr *	target,
		char *	dest,
		int	maxlen
	)

Convert target->addr to string.

Parameters

target	delegpt_addr with address in it.
dest	destination string.
maxlen	length of string buffer.

References delegpt_addr::addr.