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Diffstat (limited to 'Swiften/Network/Connector.cpp')
-rw-r--r--Swiften/Network/Connector.cpp126
1 files changed, 126 insertions, 0 deletions
diff --git a/Swiften/Network/Connector.cpp b/Swiften/Network/Connector.cpp
new file mode 100644
index 0000000..d372bf2
--- /dev/null
+++ b/Swiften/Network/Connector.cpp
@@ -0,0 +1,126 @@
+#include "Swiften/Network/Connector.h"
+
+#include <boost/bind.hpp>
+#include <iostream>
+
+#include "Swiften/Network/ConnectionFactory.h"
+#include "Swiften/Network/DomainNameResolver.h"
+#include "Swiften/Network/DomainNameAddressQuery.h"
+#include "Swiften/Network/TimerFactory.h"
+
+namespace Swift {
+
+Connector::Connector(const String& hostname, DomainNameResolver* resolver, ConnectionFactory* connectionFactory, TimerFactory* timerFactory) : hostname(hostname), resolver(resolver), connectionFactory(connectionFactory), timerFactory(timerFactory), timeoutMilliseconds(0), queriedAllHosts(true) {
+}
+
+void Connector::setTimeoutMilliseconds(int milliseconds) {
+ timeoutMilliseconds = milliseconds;
+}
+
+void Connector::start() {
+ //std::cout << "Connector::start()" << std::endl;
+ assert(!currentConnection);
+ assert(!serviceQuery);
+ assert(!timer);
+ queriedAllHosts = false;
+ serviceQuery = resolver->createServiceQuery("_xmpp-client._tcp." + hostname);
+ serviceQuery->onResult.connect(boost::bind(&Connector::handleServiceQueryResult, this, _1));
+ if (timeoutMilliseconds > 0) {
+ timer = timerFactory->createTimer(timeoutMilliseconds);
+ timer->onTick.connect(boost::bind(&Connector::handleTimeout, this));
+ timer->start();
+ }
+ serviceQuery->run();
+}
+
+void Connector::queryAddress(const String& hostname) {
+ assert(!addressQuery);
+ addressQuery = resolver->createAddressQuery(hostname);
+ addressQuery->onResult.connect(boost::bind(&Connector::handleAddressQueryResult, this, _1, _2));
+ addressQuery->run();
+}
+
+void Connector::handleServiceQueryResult(const std::vector<DomainNameServiceQuery::Result>& result) {
+ //std::cout << "Received SRV results" << std::endl;
+ serviceQueryResults = std::deque<DomainNameServiceQuery::Result>(result.begin(), result.end());
+ serviceQuery.reset();
+ tryNextHostname();
+}
+
+void Connector::tryNextHostname() {
+ if (queriedAllHosts) {
+ //std::cout << "Connector::tryNextHostName(): Queried all hosts. Error." << std::endl;
+ finish(boost::shared_ptr<Connection>());
+ }
+ else if (serviceQueryResults.empty()) {
+ //std::cout << "Connector::tryNextHostName(): Falling back on A resolution" << std::endl;
+ // Fall back on simple address resolving
+ queriedAllHosts = true;
+ queryAddress(hostname);
+ }
+ else {
+ //std::cout << "Connector::tryNextHostName(): Querying next address" << std::endl;
+ queryAddress(serviceQueryResults.front().hostname);
+ }
+}
+
+void Connector::handleAddressQueryResult(const HostAddress& address, boost::optional<DomainNameResolveError> error) {
+ //std::cout << "Connector::handleAddressQueryResult(): Start" << std::endl;
+ addressQuery.reset();
+ if (!serviceQueryResults.empty()) {
+ DomainNameServiceQuery::Result serviceQueryResult = serviceQueryResults.front();
+ serviceQueryResults.pop_front();
+ if (error) {
+ //std::cout << "Connector::handleAddressQueryResult(): A lookup for SRV host " << serviceQueryResult.hostname << " failed." << std::endl;
+ tryNextHostname();
+ }
+ else {
+ //std::cout << "Connector::handleAddressQueryResult(): A lookup for SRV host " << serviceQueryResult.hostname << " succeeded: " << address.toString() << std::endl;
+ tryConnect(HostAddressPort(address, serviceQueryResult.port));
+ }
+ }
+ else if (error) {
+ //std::cout << "Connector::handleAddressQueryResult(): Fallback address query failed. Giving up" << std::endl;
+ // The fallback address query failed
+ assert(queriedAllHosts);
+ finish(boost::shared_ptr<Connection>());
+ }
+ else {
+ //std::cout << "Connector::handleAddressQueryResult(): Fallback address query succeeded: " << address.toString() << std::endl;
+ // The fallback query succeeded
+ tryConnect(HostAddressPort(address, 5222));
+ }
+}
+
+void Connector::tryConnect(const HostAddressPort& target) {
+ assert(!currentConnection);
+ //std::cout << "Connector::tryConnect() " << target.getAddress().toString() << " " << target.getPort() << std::endl;
+ currentConnection = connectionFactory->createConnection();
+ currentConnection->onConnectFinished.connect(boost::bind(&Connector::handleConnectionConnectFinished, this, _1));
+ currentConnection->connect(target);
+}
+
+void Connector::handleConnectionConnectFinished(bool error) {
+ //std::cout << "Connector::handleConnectionConnectFinished() " << error << std::endl;
+ if (error) {
+ currentConnection.reset();
+ tryNextHostname();
+ }
+ else {
+ finish(currentConnection);
+ }
+}
+
+void Connector::finish(boost::shared_ptr<Connection> connection) {
+ if (timer) {
+ timer->stop();
+ timer.reset();
+ }
+ onConnectFinished(connection);
+}
+
+void Connector::handleTimeout() {
+ finish(boost::shared_ptr<Connection>());
+}
+
+};