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...

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

Detailed Description

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

Function Documentation

scrub_message()

int scrub_message	(	struct sldns_buffer *	pkt,
		struct msg_parse *	msg,
		struct query_info *	qinfo,
		uint8_t *	zonename,
		struct regional *	regional,
		struct module_env *	env,
		struct module_qstate *	qstate,
		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.
qstate	for setting errinf for EDE error messages.
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, msg_parse::flags, FLAGS_GET_RCODE, LDNS_RR_TYPE_NS, log_nametypeclass(), query_info::qclass, msg_parse::qdcount, and VERB_ALGO.