icinga2/components/livestatus/listener.cpp

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/******************************************************************************
* Icinga 2 *
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* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
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* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
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#include "livestatus/listener.h"
#include "config/configcompilercontext.h"
#include "base/objectlock.h"
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#include "base/dynamictype.h"
#include "base/logger_fwd.h"
#include "base/exception.h"
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#include "base/tcpsocket.h"
#include "base/unixsocket.h"
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#include "base/networkstream.h"
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#include "base/application.h"
#include "base/scriptfunction.h"
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#include "base/convert.h"
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using namespace icinga;
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REGISTER_TYPE(LivestatusListener);
REGISTER_SCRIPTFUNCTION(ValidateSocketType, &LivestatusListener::ValidateSocketType);
static int l_ClientsConnected = 0;
static int l_Connections = 0;
static boost::mutex l_ComponentMutex;
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/**
* Starts the component.
*/
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void LivestatusListener::Start(void)
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{
DynamicObject::Start();
if (GetSocketType() == "tcp") {
TcpSocket::Ptr socket = make_shared<TcpSocket>();
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socket->Bind(GetBindHost(), GetBindPort(), AF_INET);
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boost::thread thread(boost::bind(&LivestatusListener::ServerThreadProc, this, socket));
thread.detach();
Log(LogInformation, "livestatus", "Created tcp socket listening on host '" + GetBindHost() + "' port '" + GetBindPort() + "'.");
}
else if (GetSocketType() == "unix") {
#ifndef _WIN32
UnixSocket::Ptr socket = make_shared<UnixSocket>();
socket->Bind(GetSocketPath());
/* group must be able to write */
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
if (chmod(GetSocketPath().CStr(), mode) < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("chmod")
<< boost::errinfo_errno(errno)
<< boost::errinfo_file_name(GetSocketPath()));
}
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boost::thread thread(boost::bind(&LivestatusListener::ServerThreadProc, this, socket));
thread.detach();
Log(LogInformation, "livestatus", "Created unix socket in '" + GetSocketPath() + "'.");
#else
/* no unix sockets on windows */
Log(LogCritical, "livestatus", "Unix sockets are not supported on Windows.");
return;
#endif
}
}
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int LivestatusListener::GetClientsConnected(void)
{
boost::mutex::scoped_lock lock(l_ComponentMutex);
return l_ClientsConnected;
}
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int LivestatusListener::GetConnections(void)
{
boost::mutex::scoped_lock lock(l_ComponentMutex);
return l_Connections;
}
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void LivestatusListener::ServerThreadProc(const Socket::Ptr& server)
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{
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server->Listen();
for (;;) {
Socket::Ptr client = server->Accept();
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Log(LogInformation, "livestatus", "Client connected");
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boost::thread thread(boost::bind(&LivestatusListener::ClientThreadProc, this, client));
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thread.detach();
}
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}
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void LivestatusListener::ClientThreadProc(const Socket::Ptr& client)
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{
{
boost::mutex::scoped_lock lock(l_ComponentMutex);
l_ClientsConnected++;
l_Connections++;
}
Stream::Ptr stream = make_shared<NetworkStream>(client);
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for (;;) {
String line;
ReadLineContext context;
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std::vector<String> lines;
while (stream->ReadLine(&line, context)) {
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if (line.GetLength() > 0)
lines.push_back(line);
else
break;
}
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try {
Query::Ptr query = make_shared<Query>(lines, GetCompatLogPath());
if (!query->Execute(stream))
break;
} catch (const std::exception& ex) {
std::ostringstream info;
info << "Exception thrown while running livestatus query: " << std::endl
<< DiagnosticInformation(ex);
Log(LogCritical, "livestatus", info.str());
return;
}
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}
{
boost::mutex::scoped_lock lock(l_ComponentMutex);
l_ClientsConnected--;
}
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}
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void LivestatusListener::ValidateSocketType(const String& location, const Dictionary::Ptr& attrs)
{
Value socket_type = attrs->Get("socket_type");
if (!socket_type.IsEmpty() && socket_type != "unix" && socket_type != "tcp") {
ConfigCompilerContext::GetInstance()->AddMessage(true, "Validation failed for " +
location + ": Socket type '" + socket_type + "' is invalid.");
}
}