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#include "protobuf.hh"
#include "dnsparser.hh"
#include "gettime.hh"
DNSProtoBufMessage::DNSProtoBufMessage(DNSProtoBufMessageType type)
{
#ifdef HAVE_PROTOBUF
d_message.set_type(type == DNSProtoBufMessage::DNSProtoBufMessageType::Query ? PBDNSMessage_Type_DNSQueryType : PBDNSMessage_Type_DNSResponseType);
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setQuestion(const DNSName& qname, uint16_t qtype, uint16_t qclass)
{
#ifdef HAVE_PROTOBUF
PBDNSMessage_DNSQuestion* question = d_message.mutable_question();
if (question) {
question->set_qname(qname.toString());
question->set_qtype(qtype);
question->set_qclass(qclass);
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setBytes(size_t bytes)
{
#ifdef HAVE_PROTOBUF
d_message.set_inbytes(bytes);
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setResponseCode(uint8_t rcode)
{
#ifdef HAVE_PROTOBUF
PBDNSMessage_DNSResponse* response = d_message.mutable_response();
if (response) {
response->set_rcode(rcode);
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setTime(time_t sec, uint32_t usec)
{
#ifdef HAVE_PROTOBUF
d_message.set_timesec(sec);
d_message.set_timeusec(usec);
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setQueryTime(time_t sec, uint32_t usec)
{
#ifdef HAVE_PROTOBUF
PBDNSMessage_DNSResponse* response = d_message.mutable_response();
if (response) {
response->set_querytimesec(sec);
response->set_querytimeusec(usec);
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setEDNSSubnet(const Netmask& subnet, uint8_t mask)
{
#ifdef HAVE_PROTOBUF
if (!subnet.empty()) {
ComboAddress ca(subnet.getNetwork());
ca.truncate(mask);
if (ca.sin4.sin_family == AF_INET) {
d_message.set_originalrequestorsubnet(&ca.sin4.sin_addr.s_addr, sizeof(ca.sin4.sin_addr.s_addr));
}
else if (ca.sin4.sin_family == AF_INET6) {
d_message.set_originalrequestorsubnet(&ca.sin6.sin6_addr.s6_addr, sizeof(ca.sin6.sin6_addr.s6_addr));
}
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::addRRsFromPacket(const char* packet, const size_t len)
{
#ifdef HAVE_PROTOBUF
if (len < sizeof(struct dnsheader))
return;
const struct dnsheader* dh = (const struct dnsheader*) packet;
if (ntohs(dh->ancount) == 0)
return;
if (ntohs(dh->qdcount) == 0)
return;
PBDNSMessage_DNSResponse* response = d_message.mutable_response();
if (!response)
return;
vector<uint8_t> content(len - sizeof(dnsheader));
copy(packet + sizeof(dnsheader), packet + len, content.begin());
PacketReader pr(content);
size_t idx = 0;
DNSName rrname;
uint16_t qdcount = ntohs(dh->qdcount);
uint16_t ancount = ntohs(dh->ancount);
uint16_t rrtype;
uint16_t rrclass;
string blob;
struct dnsrecordheader ah;
rrname = pr.getName();
rrtype = pr.get16BitInt();
rrclass = pr.get16BitInt();
/* consume remaining qd if any */
if (qdcount > 1) {
for(idx = 1; idx < qdcount; idx++) {
rrname = pr.getName();
rrtype = pr.get16BitInt();
rrclass = pr.get16BitInt();
(void) rrtype;
(void) rrclass;
}
}
/* parse AN */
for (idx = 0; idx < ancount; idx++) {
rrname = pr.getName();
pr.getDnsrecordheader(ah);
pr.xfrBlob(blob);
if (ah.d_type == QType::A || ah.d_type == QType::AAAA) {
PBDNSMessage_DNSResponse_DNSRR* rr = response->add_rrs();
if (rr) {
rr->set_name(rrname.toString());
rr->set_type(ah.d_type);
rr->set_class_(ah.d_class);
rr->set_ttl(ah.d_ttl);
rr->set_rdata(blob.c_str(), blob.length());
}
}
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setRequestor(const std::string& requestor)
{
#ifdef HAVE_PROTOBUF
d_message.set_from(requestor);
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setRequestor(const ComboAddress& requestor)
{
#ifdef HAVE_PROTOBUF
if (requestor.sin4.sin_family == AF_INET) {
d_message.set_from(&requestor.sin4.sin_addr.s_addr, sizeof(requestor.sin4.sin_addr.s_addr));
}
else if (requestor.sin4.sin_family == AF_INET6) {
d_message.set_from(&requestor.sin6.sin6_addr.s6_addr, sizeof(requestor.sin6.sin6_addr.s6_addr));
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setResponder(const std::string& responder)
{
#ifdef HAVE_PROTOBUF
d_message.set_to(responder);
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::setResponder(const ComboAddress& responder)
{
#ifdef HAVE_PROTOBUF
if (responder.sin4.sin_family == AF_INET) {
d_message.set_to(&responder.sin4.sin_addr.s_addr, sizeof(responder.sin4.sin_addr.s_addr));
}
else if (responder.sin4.sin_family == AF_INET6) {
d_message.set_to(&responder.sin6.sin6_addr.s6_addr, sizeof(responder.sin6.sin6_addr.s6_addr));
}
#endif /* HAVE_PROTOBUF */
}
void DNSProtoBufMessage::serialize(std::string& data) const
{
#ifdef HAVE_PROTOBUF
d_message.SerializeToString(&data);
#endif /* HAVE_PROTOBUF */
}
std::string DNSProtoBufMessage::toDebugString() const
{
#ifdef HAVE_PROTOBUF
return d_message.DebugString();
#else
return std::string();
#endif /* HAVE_PROTOBUF */
}
#ifdef HAVE_PROTOBUF
void DNSProtoBufMessage::setUUID(const boost::uuids::uuid& uuid)
{
std::string* messageId = d_message.mutable_messageid();
messageId->resize(uuid.size());
std::copy(uuid.begin(), uuid.end(), messageId->begin());
}
void DNSProtoBufMessage::update(const boost::uuids::uuid& uuid, const ComboAddress* requestor, const ComboAddress* responder, bool isTCP, uint16_t id)
{
struct timespec ts;
gettime(&ts, true);
setTime(ts.tv_sec, ts.tv_nsec / 1000);
setUUID(uuid);
d_message.set_id(ntohs(id));
d_message.set_socketfamily((requestor && requestor->sin4.sin_family == AF_INET) ? PBDNSMessage_SocketFamily_INET : PBDNSMessage_SocketFamily_INET6);
d_message.set_socketprotocol(isTCP ? PBDNSMessage_SocketProtocol_TCP : PBDNSMessage_SocketProtocol_UDP);
if (responder) {
setResponder(*responder);
}
if (requestor) {
setRequestor(*requestor);
}
}
DNSProtoBufMessage::DNSProtoBufMessage(DNSProtoBufMessageType type, const boost::uuids::uuid& uuid, const ComboAddress* requestor, const ComboAddress* to, const DNSName& domain, int qtype, uint16_t qclass, uint16_t qid, bool isTCP, size_t bytes)
{
update(uuid, requestor, to, isTCP, qid);
d_message.set_type(type == DNSProtoBufMessage::DNSProtoBufMessageType::Query ? PBDNSMessage_Type_DNSQueryType : PBDNSMessage_Type_DNSResponseType);
setBytes(bytes);
setQuestion(domain, qtype, qclass);
}
#endif /* HAVE_PROTOBUF */
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