iter_scrub.h File Reference

This file has routine(s) for cleaning up incoming DNS messages from possible useless or malicious junk in it. More...

#include <ldns/buffer.h>

Functions
int	scrub_message (ldns_buffer *pkt, struct msg_parse *msg, struct query_info *qinfo, uint8_t *zonename, struct regional *regional, struct module_env *env, struct iter_env *ie)
	Cleanup the passed dns message.

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Detailed Description

This file has routine(s) for cleaning up incoming DNS messages from possible useless or malicious junk in it.

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Function Documentation

int scrub_message	(	ldns_buffer *	pkt,
		struct msg_parse *	msg,
		struct query_info *	qinfo,
		uint8_t *	zonename,
		struct regional *	regional,
		struct module_env *	env,
		struct iter_env *	ie
	)

Cleanup the passed dns message.

Parameters:

pkt,:	the packet itself, for resolving name compression pointers. the packet buffer is unaltered.
msg,:	the parsed packet, this structure is cleaned up.
qinfo,:	the query info that was sent to the server. Checked.
zonename,:	the name of the last delegation point. Used to determine out of bailiwick information.
regional,:	where to allocate (new) parts of the message.
env,:	module environment with config settings and cache.
ie,:	iterator module environment data.

Returns:

: false if the message is total waste. true if scrubbed with success.

References BIT_AD, BIT_QR, BIT_Z, dname_pkt_compare(), msg_parse::flags, FLAGS_GET_RCODE, log_nametypeclass(), query_info::qclass, msg_parse::qclass, msg_parse::qdcount, query_info::qname, msg_parse::qname, query_info::qtype, msg_parse::qtype, scrub_normalize(), scrub_sanitize(), and VERB_ALGO.

Referenced by process_response().