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#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>());
}
};
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Swift