1 files changed, 211 insertions, 0 deletions
diff --git a/lib/livestatus/livestatuslistener.cpp b/lib/livestatus/livestatuslistener.cpp
new file mode 100644
index 0000000..e44650b
--- /dev/null
+++ b/lib/livestatus/livestatuslistener.cpp
@@ -0,0 +1,211 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#include "livestatus/livestatuslistener.hpp"
+#include "livestatus/livestatuslistener-ti.cpp"
+#include "base/utility.hpp"
+#include "base/perfdatavalue.hpp"
+#include "base/objectlock.hpp"
+#include "base/configtype.hpp"
+#include "base/logger.hpp"
+#include "base/exception.hpp"
+#include "base/tcpsocket.hpp"
+#include "base/unixsocket.hpp"
+#include "base/networkstream.hpp"
+#include "base/application.hpp"
+#include "base/function.hpp"
+#include "base/statsfunction.hpp"
+#include "base/convert.hpp"
+
+using namespace icinga;
+
+REGISTER_TYPE(LivestatusListener);
+
+static int l_ClientsConnected = 0;
+static int l_Connections = 0;
+static std::mutex l_ComponentMutex;
+
+REGISTER_STATSFUNCTION(LivestatusListener, &LivestatusListener::StatsFunc);
+
+void LivestatusListener::StatsFunc(const Dictionary::Ptr& status, const Array::Ptr& perfdata)
+{
+	DictionaryData nodes;
+
+	for (const LivestatusListener::Ptr& livestatuslistener : ConfigType::GetObjectsByType<LivestatusListener>()) {
+		nodes.emplace_back(livestatuslistener->GetName(), new Dictionary({
+			{ "connections", l_Connections }
+		}));
+
+		perfdata->Add(new PerfdataValue("livestatuslistener_" + livestatuslistener->GetName() + "_connections", l_Connections));
+	}
+
+	status->Set("livestatuslistener", new Dictionary(std::move(nodes)));
+}
+
+/**
+ * Starts the component.
+ */
+void LivestatusListener::Start(bool runtimeCreated)
+{
+	ObjectImpl<LivestatusListener>::Start(runtimeCreated);
+
+	Log(LogInformation, "LivestatusListener")
+		<< "'" << GetName() << "' started.";
+
+	if (GetSocketType() == "tcp") {
+		TcpSocket::Ptr socket = new TcpSocket();
+
+		try {
+			socket->Bind(GetBindHost(), GetBindPort(), AF_UNSPEC);
+		} catch (std::exception&) {
+			Log(LogCritical, "LivestatusListener")
+				<< "Cannot bind TCP socket on host '" << GetBindHost() << "' port '" << GetBindPort() << "'.";
+			return;
+		}
+
+		m_Listener = socket;
+
+		m_Thread = std::thread([this]() { ServerThreadProc(); });
+
+		Log(LogInformation, "LivestatusListener")
+			<< "Created TCP socket listening on host '" << GetBindHost() << "' port '" << GetBindPort() << "'.";
+	}
+	else if (GetSocketType() == "unix") {
+#ifndef _WIN32
+		UnixSocket::Ptr socket = new UnixSocket();
+
+		try {
+			socket->Bind(GetSocketPath());
+		} catch (std::exception&) {
+			Log(LogCritical, "LivestatusListener")
+				<< "Cannot bind UNIX socket to '" << GetSocketPath() << "'.";
+			return;
+		}
+
+		/* group must be able to write */
+		mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
+
+		if (chmod(GetSocketPath().CStr(), mode) < 0) {
+			Log(LogCritical, "LivestatusListener")
+				<< "chmod() on unix socket '" << GetSocketPath() << "' failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
+			return;
+		}
+
+		m_Listener = socket;
+
+		m_Thread = std::thread([this]() { ServerThreadProc(); });
+
+		Log(LogInformation, "LivestatusListener")
+			<< "Created UNIX socket in '" << GetSocketPath() << "'.";
+#else
+		/* no UNIX sockets on windows */
+		Log(LogCritical, "LivestatusListener", "Unix sockets are not supported on Windows.");
+		return;
+#endif
+	}
+}
+
+void LivestatusListener::Stop(bool runtimeRemoved)
+{
+	ObjectImpl<LivestatusListener>::Stop(runtimeRemoved);
+
+	Log(LogInformation, "LivestatusListener")
+		<< "'" << GetName() << "' stopped.";
+
+	m_Listener->Close();
+
+	if (m_Thread.joinable())
+		m_Thread.join();
+}
+
+int LivestatusListener::GetClientsConnected()
+{
+	std::unique_lock<std::mutex> lock(l_ComponentMutex);
+
+	return l_ClientsConnected;
+}
+
+int LivestatusListener::GetConnections()
+{
+	std::unique_lock<std::mutex> lock(l_ComponentMutex);
+
+	return l_Connections;
+}
+
+void LivestatusListener::ServerThreadProc()
+{
+	m_Listener->Listen();
+
+	try {
+		for (;;) {
+			timeval tv = { 0, 500000 };
+
+			if (m_Listener->Poll(true, false, &tv)) {
+				Socket::Ptr client = m_Listener->Accept();
+				Log(LogNotice, "LivestatusListener", "Client connected");
+				Utility::QueueAsyncCallback([this, client]() { ClientHandler(client); }, LowLatencyScheduler);
+			}
+
+			if (!IsActive())
+				break;
+		}
+	} catch (std::exception&) {
+		Log(LogCritical, "LivestatusListener", "Cannot accept new connection.");
+	}
+
+	m_Listener->Close();
+}
+
+void LivestatusListener::ClientHandler(const Socket::Ptr& client)
+{
+	{
+		std::unique_lock<std::mutex> lock(l_ComponentMutex);
+		l_ClientsConnected++;
+		l_Connections++;
+	}
+
+	Stream::Ptr stream = new NetworkStream(client);
+
+	StreamReadContext context;
+
+	for (;;) {
+		String line;
+
+		std::vector<String> lines;
+
+		for (;;) {
+			StreamReadStatus srs = stream->ReadLine(&line, context);
+
+			if (srs == StatusEof)
+				break;
+
+			if (srs != StatusNewItem)
+				continue;
+
+			if (line.GetLength() > 0)
+				lines.push_back(line);
+			else
+				break;
+		}
+
+		if (lines.empty())
+			break;
+
+		LivestatusQuery::Ptr query = new LivestatusQuery(lines, GetCompatLogPath());
+		if (!query->Execute(stream))
+			break;
+	}
+
+	{
+		std::unique_lock<std::mutex> lock(l_ComponentMutex);
+		l_ClientsConnected--;
+	}
+}
+
+
+void LivestatusListener::ValidateSocketType(const Lazy<String>& lvalue, const ValidationUtils& utils)
+{
+	ObjectImpl<LivestatusListener>::ValidateSocketType(lvalue, utils);
+
+	if (lvalue() != "unix" && lvalue() != "tcp")
+		BOOST_THROW_EXCEPTION(ValidationError(this, { "socket_type" }, "Socket type '" + lvalue() + "' is invalid."));
+}