zeek/scripts/policy/protocols/dns/auth-addl.bro
Seth Hall 597a4d6704 Hopefully the last major script reorganization.
- policy/ renamed to scripts/

- By default BROPATH now contains:
	- scripts/
	- scripts/policy
	- scripts/site

- *Nearly* all tests pass.

- All of scripts/base/ is loaded by main.cc
	- Can be disabled by setting $BRO_NO_BASE_SCRIPTS
	- Scripts in scripts/base/ don't use relative path loading to ease use of BRO_NO_BASE_SCRIPTS (to copy and paste that script).

- The scripts in scripts/base/protocols/ only (or soon will only) do logging and state building.

- The scripts in scripts/base/frameworks/ add functionality without causing any additional overhead.

- All "detection" activity happens through scripts in scripts/policy/.

- Communications framework modified temporarily to need an environment variable to actually enable (ENABLE_COMMUNICATION=1)
	- This is so the communications framework can be loaded as part
	  of the base without causing trouble when it's not needed.
	- This will be removed once a resolution to ticket #540 is reached.
2011-08-05 23:09:53 -04:00

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redef dns_skip_all_auth = F;
redef dns_skip_all_addl = F;
module DNS;
export {
redef record Info += {
auth: set[string] &log &optional;
addl: set[string] &log &optional;
};
}
event do_reply(c: connection, msg: dns_msg, ans: dns_answer, reply: string) &priority=4
{
# The "ready" flag will be set here. This causes the setting from the
# base script to be overridden since the base script will log immediately
# after all of the ANS replies have been seen.
c$dns$ready=F;
if ( ans$answer_type == DNS_AUTH )
{
if ( ! c$dns?$auth )
c$dns$auth = set();
add c$dns$auth[reply];
}
else if ( ans$answer_type == DNS_ADDL )
{
if ( ! c$dns?$addl )
c$dns$addl = set();
add c$dns$addl[reply];
}
if ( c$dns?$answers && c$dns?$auth && c$dns?$addl &&
c$dns$total_replies == |c$dns$answers| + |c$dns$auth| + |c$dns$addl| )
{
# *Now* all replies desired have been seen.
c$dns$ready = T;
}
}