1 files changed, 221 insertions, 0 deletions
diff --git a/Swiften/Network/UnboundDomainNameResolver.cpp b/Swiften/Network/UnboundDomainNameResolver.cpp
new file mode 100644
index 0000000..1b36012
--- /dev/null
+++ b/Swiften/Network/UnboundDomainNameResolver.cpp
@@ -0,0 +1,221 @@
+#include "UnboundDomainNameResolver.h"
+
+#include <vector>
+
+#include <boost/bind.hpp>
+#include <boost/smart_ptr/make_shared.hpp>
+
+#include <Swiften/Base/Log.h>
+#include <Swiften/Network/DomainNameAddressQuery.h>
+#include <Swiften/Network/DomainNameResolveError.h>
+#include <Swiften/Network/DomainNameServiceQuery.h>
+#include <Swiften/Network/HostAddress.h>
+#include <Swiften/Network/Timer.h>
+#include <Swiften/Network/TimerFactory.h>
+
+
+#include <arpa/inet.h>
+#include <ldns/ldns.h>
+#include <unbound.h>
+#include <unistd.h>
+
+namespace Swift {
+
+class UnboundDomainNameServiceQuery : public DomainNameServiceQuery {
+	public:
+		UnboundDomainNameServiceQuery(TimerFactory* timerFactory, const std::string& name) : timerFactory(timerFactory), name(name), ubContext(0) {
+
+		}
+
+		virtual ~UnboundDomainNameServiceQuery() {
+			if (ubContext) {
+				ub_ctx_delete(ubContext);
+			}
+		}
+
+		static void unbound_service_callback(void* data, int err, struct ub_result* result) {
+			UnboundDomainNameServiceQuery* query = static_cast<UnboundDomainNameServiceQuery*>(data);
+			query->handleResult(err, result);
+		}
+
+		virtual void run() {
+			int retval;
+
+			/* create context */
+			ubContext = ub_ctx_create();
+			if(!ubContext) {
+				SWIFT_LOG(debug) << "could not create unbound context" << std::endl;
+				return;
+			}
+			ub_ctx_async(ubContext, true);
+			retval = ub_resolve_async(ubContext, const_cast<char*>(name.c_str()), LDNS_RR_TYPE_SRV,
+						  1 /* CLASS IN (internet) */,
+						  this, unbound_service_callback, NULL);
+			if(retval != 0) {
+				SWIFT_LOG(debug) << "resolve error: " << ub_strerror(retval) << std::endl;
+			}
+
+			timer = timerFactory->createTimer(500);
+			timer->onTick.connect(boost::bind(&UnboundDomainNameServiceQuery::processData, this));
+			timer->start();
+		}
+
+		void processData() {
+			if (ub_poll(ubContext)) {
+				int ret = ub_process(ubContext);
+				if(ret != 0) {
+					SWIFT_LOG(debug) << "resolve error: " << ub_strerror(ret) << std::endl;
+				}
+			} else {
+				timer->start();
+			}
+		}
+
+		void handleResult(int err, struct ub_result* result) {
+			std::vector<DomainNameServiceQuery::Result> serviceRecords;
+
+			if(err != 0) {
+				SWIFT_LOG(debug) << "resolve error: " << ub_strerror(err) << std::endl;
+			} else {
+				if(result->havedata) {
+					ldns_pkt* replyPacket = 0;
+					ldns_buffer* buffer = ldns_buffer_new(1024);
+					if (buffer && ldns_wire2pkt(&replyPacket, static_cast<const uint8_t*>(result->answer_packet), result->answer_len) == LDNS_STATUS_OK) {
+						ldns_rr_list* rrList = ldns_pkt_answer(replyPacket);
+						for (size_t n = 0; n < ldns_rr_list_rr_count(rrList); n++) {
+							ldns_rr* rr = ldns_rr_list_rr(rrList, n);
+							if ((ldns_rr_get_type(rr) != LDNS_RR_TYPE_SRV) ||
+								(ldns_rr_get_class(rr) != LDNS_RR_CLASS_IN) ||
+							    (ldns_rr_rd_count(rr) != 4)) {
+								continue;
+							}
+
+							DomainNameServiceQuery::Result serviceRecord;
+							serviceRecord.priority = ldns_rdf2native_int16(ldns_rr_rdf(rr, 0));
+							serviceRecord.weight = ldns_rdf2native_int16(ldns_rr_rdf(rr, 1));
+							serviceRecord.port = ldns_rdf2native_int16(ldns_rr_rdf(rr, 2));
+
+							ldns_buffer_rewind(buffer);
+							if ((ldns_rdf2buffer_str_dname(buffer, ldns_rr_rdf(rr, 3)) != LDNS_STATUS_OK) ||
+							    (ldns_buffer_position(buffer) < 2) ||
+							    !ldns_buffer_reserve(buffer, 1)) {
+								// either name invalid, empty or buffer to small
+								continue;
+							}
+							char terminator = 0;
+							ldns_buffer_write(buffer, &terminator, sizeof(terminator));
+
+							serviceRecord.hostname = std::string(reinterpret_cast<char*>(ldns_buffer_at(buffer, 0)));
+							serviceRecords.push_back(serviceRecord);
+							SWIFT_LOG(debug) << "hostname " << serviceRecord.hostname << " added" << std::endl;
+						}
+					}
+					if (replyPacket) ldns_pkt_free(replyPacket);
+					if (buffer) ldns_buffer_free(buffer);
+				}
+			}
+
+			ub_resolve_free(result);
+			onResult(serviceRecords);
+		}
+
+	private:
+		TimerFactory* timerFactory;
+		Timer::ref timer;
+		std::string name;
+		ub_ctx* ubContext;
+};
+
+class UnboundDomainNameAddressQuery : public DomainNameAddressQuery {
+	public:
+		UnboundDomainNameAddressQuery(TimerFactory* timerFactory, const std::string& name) : timerFactory(timerFactory), name(name), ubContext(0) {
+
+		}
+
+		virtual ~UnboundDomainNameAddressQuery() {
+			if (ubContext) {
+				ub_ctx_delete(ubContext);
+			}
+		}
+
+		static void unbound_address_callback(void* data, int err, struct ub_result* result) {
+			UnboundDomainNameAddressQuery* query = static_cast<UnboundDomainNameAddressQuery*>(data);
+			query->handleResult(err, result);
+		}
+
+		virtual void run() {
+			int retval;
+
+			/* create context */
+			ubContext = ub_ctx_create();
+			if(!ubContext) {
+				SWIFT_LOG(debug) << "could not create unbound context" << std::endl;
+				return;
+			}
+
+			ub_ctx_async(ubContext, true);
+			retval = ub_resolve_async(ubContext, const_cast<char*>(name.c_str()), LDNS_RR_TYPE_A,
+						  1 /* CLASS IN (internet) */,
+						  this, unbound_address_callback, NULL);
+			if(retval != 0) {
+				SWIFT_LOG(debug) << "resolve error: " << ub_strerror(retval) << std::endl;
+			}
+
+			timer = timerFactory->createTimer(500);
+			timer->onTick.connect(boost::bind(&UnboundDomainNameAddressQuery::processData, this));
+			timer->start();
+		}
+
+		void processData() {
+			if (ub_poll(ubContext)) {
+				int ret = ub_process(ubContext);
+				if(ret != 0) {
+					SWIFT_LOG(debug) << "resolve error: " << ub_strerror(ret) << std::endl;
+				}
+			} else {
+				timer->start();
+			}
+		}
+
+		void handleResult(int err, struct ub_result* result) {
+			std::vector<HostAddress> addresses;
+			boost::optional<DomainNameResolveError> error;
+
+			if(err != 0) {
+				SWIFT_LOG(debug) << "resolve error: " << ub_strerror(err) << std::endl;
+				error = DomainNameResolveError();
+			} else {
+				if(result->havedata) {
+					for(int i=0; result->data[i]; i++) {
+						addresses.push_back(HostAddress(std::string(inet_ntoa(* (struct in_addr*)result->data[i]))));
+					}
+				}
+			}
+
+			ub_resolve_free(result);
+			onResult(addresses, error);
+		}
+
+	private:
+		TimerFactory* timerFactory;
+		Timer::ref timer;
+		std::string name;
+		ub_ctx* ubContext;
+
+};
+
+UnboundDomainNameResolver::UnboundDomainNameResolver(EventLoop* eventLoop, TimerFactory* timerFactory) : eventLoop(eventLoop), timerFactory(timerFactory) {
+}
+
+UnboundDomainNameResolver::~UnboundDomainNameResolver() {
+}
+
+boost::shared_ptr<DomainNameServiceQuery> UnboundDomainNameResolver::createServiceQuery(const std::string& name) {
+	return boost::make_shared<UnboundDomainNameServiceQuery>(timerFactory, name);
+}
+
+boost::shared_ptr<DomainNameAddressQuery> UnboundDomainNameResolver::createAddressQuery(const std::string& name) {
+	return boost::make_shared<UnboundDomainNameAddressQuery>(timerFactory, name);
+}
+
+}