Commit fb4ca10d authored by Michal 'vorner' Vaner's avatar Michal 'vorner' Vaner
Browse files

[trac505] DNAME handling and CNAME synthesis

parent 59dd3fb6
......@@ -144,10 +144,47 @@ Query::process() const {
while (keep_doing) {
keep_doing = false;
std::auto_ptr<RRsetList> target(qtype_is_any ? new RRsetList : NULL);
Zone::FindResult db_result =
result.zone->find(qname_, qtype_, target.get());
/*
* We use the rrset, not db_result.rrset because we might replace
* it while synthetizing the CNAME out of DNAME. The db_result is
* imutable, so we have a different variable.
*/
Zone::FindResult db_result(result.zone->find(qname_, qtype_,
target.get()));
ConstRRsetPtr rrset(db_result.rrset);
switch (db_result.code) {
case Zone::DNAME: {
// First, put the dname into the answer
response_.addRRset(Message::SECTION_ANSWER,
boost::const_pointer_cast<RRset>(rrset));
/*
* We synthetize CNAME out of it, replace the rrset and let
* the CNAME case handle it (including future chaining).
* Therefore, we just fall trough to it.
*/
/*
* Empty DNAME should never get in, as it is impossible to
* create one in master file.
*/
assert(rrset->getRdataCount() > 0);
// Get the data of DNAME
const rdata::generic::DNAME& dname(
dynamic_cast<const rdata::generic::DNAME&>(
rrset->getRdataIterator()->getCurrent()));
// The new CNAME we are creating (it will be unsigned even
// with DNSSEC, the DNAME is signed and it can be validated
// by that)
RRsetPtr cname(new RRset(qname_, rrset->getClass(),
RRType::CNAME(), rrset->getTTL()));
// Construct the new target by replacing the end
cname->addRdata(rdata::generic::CNAME(qname_.split(0,
qname_.getLabelCount() -
rrset->getName().getLabelCount()).concatenate(
dname.getDname())));
rrset = cname;
// No break; here, fall trough.
}
case Zone::CNAME:
/*
* We don't do chaining yet. Therefore handling a CNAME is
......@@ -167,9 +204,9 @@ Query::process() const {
}
} else {
response_.addRRset(Message::SECTION_ANSWER,
boost::const_pointer_cast<RRset>(db_result.rrset));
boost::const_pointer_cast<RRset>(rrset));
// Handle additional for answer section
getAdditional(*result.zone, *db_result.rrset);
getAdditional(*result.zone, *rrset);
}
// If apex NS records haven't been provided in the answer
// section, insert apex NS records into the authority section
......@@ -186,8 +223,8 @@ Query::process() const {
response_.setHeaderFlag(Message::HEADERFLAG_AA, false);
response_.setRcode(Rcode::NOERROR());
response_.addRRset(Message::SECTION_AUTHORITY,
boost::const_pointer_cast<RRset>(db_result.rrset));
getAdditional(*result.zone, *db_result.rrset);
boost::const_pointer_cast<RRset>(rrset));
getAdditional(*result.zone, *rrset);
break;
case Zone::NXDOMAIN:
// Just empty answer with SOA in authority section
......@@ -199,9 +236,6 @@ Query::process() const {
response_.setRcode(Rcode::NOERROR());
putSOA(*result.zone);
break;
case Zone::DNAME:
// TODO : replace qname, continue lookup
break;
}
}
}
......
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