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/* 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."));
}
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