zeek/policy/protocols/dns/auth-addl.bro

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@load dns/base
# TODO: remove these when the options are removed from the core analyzers.
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;
}
}