1 files changed, 186 insertions, 0 deletions
diff --git a/dnsdist-protobuf.cc b/dnsdist-protobuf.cc
new file mode 100644
index 0000000..df8cb3f
--- /dev/null
+++ b/dnsdist-protobuf.cc
@@ -0,0 +1,186 @@
+/*
+ * This file is part of PowerDNS or dnsdist.
+ * Copyright -- PowerDNS.COM B.V. and its contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * In addition, for the avoidance of any doubt, permission is granted to
+ * link this program with OpenSSL and to (re)distribute the binaries
+ * produced as the result of such linking.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include "config.h"
+#include "dnsdist.hh"
+#include "dnsdist-protobuf.hh"
+#include "protozero.hh"
+
+DNSDistProtoBufMessage::DNSDistProtoBufMessage(const DNSQuestion& dq): d_dq(dq), d_type(pdns::ProtoZero::Message::MessageType::DNSQueryType)
+{
+}
+
+DNSDistProtoBufMessage::DNSDistProtoBufMessage(const DNSResponse& dr, bool includeCNAME): d_dq(dr), d_dr(&dr), d_type(pdns::ProtoZero::Message::MessageType::DNSResponseType), d_includeCNAME(includeCNAME)
+{
+}
+
+void DNSDistProtoBufMessage::setServerIdentity(const std::string& serverId)
+{
+  d_serverIdentity = serverId;
+}
+
+void DNSDistProtoBufMessage::setRequestor(const ComboAddress& requestor)
+{
+  d_requestor = requestor;
+}
+
+void DNSDistProtoBufMessage::setResponder(const ComboAddress& responder)
+{
+  d_responder = responder;
+}
+
+void DNSDistProtoBufMessage::setRequestorPort(uint16_t port)
+{
+  if (d_requestor) {
+    d_requestor->setPort(port);
+  }
+}
+
+void DNSDistProtoBufMessage::setResponderPort(uint16_t port)
+{
+  if (d_responder) {
+    d_responder->setPort(port);
+  }
+}
+
+void DNSDistProtoBufMessage::setResponseCode(uint8_t rcode)
+{
+  d_rcode = rcode;
+}
+
+void DNSDistProtoBufMessage::setType(pdns::ProtoZero::Message::MessageType type)
+{
+  d_type = type;
+}
+
+void DNSDistProtoBufMessage::setBytes(size_t bytes)
+{
+  d_bytes = bytes;
+}
+
+void DNSDistProtoBufMessage::setTime(time_t sec, uint32_t usec)
+{
+  d_time = std::pair(sec, usec);
+}
+
+void DNSDistProtoBufMessage::setQueryTime(time_t sec, uint32_t usec)
+{
+  d_queryTime = std::pair(sec, usec);
+}
+
+void DNSDistProtoBufMessage::setQuestion(const DNSName& name, uint16_t qtype, uint16_t qclass)
+{
+  d_question = DNSDistProtoBufMessage::PBQuestion(name, qtype, qclass);
+}
+
+void DNSDistProtoBufMessage::setEDNSSubnet(const Netmask& nm)
+{
+  d_ednsSubnet = nm;
+}
+
+void DNSDistProtoBufMessage::addTag(const std::string& strValue)
+{
+  d_additionalTags.push_back(strValue);
+}
+
+void DNSDistProtoBufMessage::addRR(DNSName&& qname, uint16_t uType, uint16_t uClass, uint32_t uTTL, const std::string& strBlob)
+{
+  d_additionalRRs.push_back({std::move(qname), strBlob, uTTL, uType, uClass});
+}
+
+void DNSDistProtoBufMessage::serialize(std::string& data) const
+{
+  if ((data.capacity() - data.size()) < 128) {
+    data.reserve(data.size() + 128);
+  }
+  pdns::ProtoZero::Message m{data};
+
+  m.setType(d_type);
+
+  if (d_time) {
+    m.setTime(d_time->first, d_time->second);
+  }
+  else {
+    struct timespec ts;
+    gettime(&ts, true);
+    m.setTime(ts.tv_sec, ts.tv_nsec / 1000);
+  }
+
+  const auto distProto = d_dq.getProtocol();
+  pdns::ProtoZero::Message::TransportProtocol protocol = pdns::ProtoZero::Message::TransportProtocol::UDP;
+
+  if (distProto == dnsdist::Protocol::DoTCP) {
+    protocol = pdns::ProtoZero::Message::TransportProtocol::TCP;
+  }
+  else if (distProto == dnsdist::Protocol::DoT) {
+    protocol = pdns::ProtoZero::Message::TransportProtocol::DoT;
+  }
+  else if (distProto == dnsdist::Protocol::DoH) {
+    protocol = pdns::ProtoZero::Message::TransportProtocol::DoH;
+  }
+  else if (distProto == dnsdist::Protocol::DNSCryptUDP) {
+    protocol = pdns::ProtoZero::Message::TransportProtocol::DNSCryptUDP;
+  }
+  else if (distProto == dnsdist::Protocol::DNSCryptTCP) {
+    protocol = pdns::ProtoZero::Message::TransportProtocol::DNSCryptTCP;
+  }
+
+  m.setRequest(d_dq.uniqueId ? *d_dq.uniqueId : getUniqueID(), d_requestor ? *d_requestor : *d_dq.remote, d_responder ? *d_responder : *d_dq.local, d_question ? d_question->d_name : *d_dq.qname, d_question ? d_question->d_type : d_dq.qtype, d_question ? d_question->d_class : d_dq.qclass, d_dq.getHeader()->id, protocol, d_bytes ? *d_bytes : d_dq.getData().size());
+
+  if (d_serverIdentity) {
+    m.setServerIdentity(*d_serverIdentity);
+  }
+  else if (d_ServerIdentityRef != nullptr) {
+    m.setServerIdentity(*d_ServerIdentityRef);
+  }
+
+  if (d_ednsSubnet) {
+    m.setEDNSSubnet(*d_ednsSubnet, 128);
+  }
+
+  m.startResponse();
+  if (d_queryTime) {
+    m.setQueryTime(d_queryTime->first, d_queryTime->second);
+  }
+  else {
+    m.setQueryTime(d_dq.queryTime->tv_sec, d_dq.queryTime->tv_nsec / 1000);
+  }
+
+  if (d_dr != nullptr) {
+    m.setResponseCode(d_rcode ? *d_rcode : d_dr->getHeader()->rcode);
+    m.addRRsFromPacket(reinterpret_cast<const char*>(d_dr->getData().data()), d_dr->getData().size(), d_includeCNAME);
+  }
+  else {
+    if (d_rcode) {
+      m.setResponseCode(*d_rcode);
+    }
+  }
+
+  for (const auto& rr : d_additionalRRs) {
+    m.addRR(rr.d_name, rr.d_type, rr.d_class, rr.d_ttl, rr.d_data);
+  }
+
+  for (const auto& tag : d_additionalTags) {
+    m.addPolicyTag(tag);
+  }
+
+  m.commitResponse();
+}