icinga2/lib/cli/agentblackandwhitelistcommand.cpp

/******************************************************************************
 * Icinga 2                                                                   *
 * Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org)    *
 *                                                                            *
 * 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.             *
 ******************************************************************************/

#include "cli/agentblackandwhitelistcommand.hpp"
#include "cli/agentutility.hpp"
#include "base/logger.hpp"
#include "base/application.hpp"
#include "base/objectlock.hpp"
#include "base/json.hpp"
#include <boost/foreach.hpp>
#include <boost/algorithm/string/case_conv.hpp>
#include <iostream>
#include <fstream>

using namespace icinga;
namespace po = boost::program_options;

REGISTER_BLACKANDWHITELIST_CLICOMMAND(whitelist);
REGISTER_BLACKANDWHITELIST_CLICOMMAND(blacklist);

RegisterBlackAndWhitelistCLICommandHelper::RegisterBlackAndWhitelistCLICommandHelper(const String& type)
{
	String ltype = type;
	boost::algorithm::to_lower(ltype);

	std::vector<String> name;
	name.push_back("agent");
	name.push_back(ltype);
	name.push_back("add");
	CLICommand::Register(name, make_shared<BlackAndWhitelistCommand>(type, BlackAndWhitelistCommandAdd));

	name[2] = "remove";
	CLICommand::Register(name, make_shared<BlackAndWhitelistCommand>(type, BlackAndWhitelistCommandRemove));

	name[2] = "list";
	CLICommand::Register(name, make_shared<BlackAndWhitelistCommand>(type, BlackAndWhitelistCommandList));
}

BlackAndWhitelistCommand::BlackAndWhitelistCommand(const String& type, BlackAndWhitelistCommandType command)
	: m_Type(type), m_Command(command)
{ }

String BlackAndWhitelistCommand::GetDescription(void) const
{
	String description;

	switch (m_Command) {
		case BlackAndWhitelistCommandAdd:
			description = "Adds a new";
			break;
		case BlackAndWhitelistCommandRemove:
			description = "Removes a";
			break;
		case BlackAndWhitelistCommandList:
			description = "Lists all";
			break;
	}

	description += " " + m_Type + " filter";

	if (m_Command == BlackAndWhitelistCommandList)
		description += "s";

	return description;
}

String BlackAndWhitelistCommand::GetShortDescription(void) const
{
	String description;

	switch (m_Command) {
		case BlackAndWhitelistCommandAdd:
			description = "adds a new";
			break;
		case BlackAndWhitelistCommandRemove:
			description = "removes a";
			break;
		case BlackAndWhitelistCommandList:
			description = "lists all";
			break;
	}

	description += " " + m_Type + " filter";

	if (m_Command == BlackAndWhitelistCommandList)
		description += "s";

	return description;
}

void BlackAndWhitelistCommand::InitParameters(boost::program_options::options_description& visibleDesc,
    boost::program_options::options_description& hiddenDesc) const
{
	visibleDesc.add_options()
		("agent", po::value<std::string>(), "The name of the agent")
		("host", po::value<std::string>(), "The name of the host")
		("service", po::value<std::string>(), "The name of the service");

	if (m_Command == BlackAndWhitelistCommandAdd) {
		//TODO: call list functionality
	}
}

/**
 * The entry point for the "agent <whitelist/blacklist> <add/remove/list>" CLI command.
 *
 * @returns An exit status.
 */
int BlackAndWhitelistCommand::Run(const boost::program_options::variables_map& vm, const std::vector<std::string>& ap) const
{
	String list_path = AgentUtility::GetRepositoryPath() + "/" + m_Type + ".list";

	Dictionary::Ptr lists = make_shared<Dictionary>();

	if (Utility::PathExists(list_path)) {
		lists = Utility::LoadJsonFile(list_path);
	}

	if (m_Command == BlackAndWhitelistCommandAdd) {
		if (!vm.count("agent")) {
			Log(LogCritical, "cli", "At least the agent name filter is required!");
			return 1;
		}
		if (!vm.count("host")) {
			Log(LogCritical, "cli", "At least the host name filter is required!");
			return 1;
		}

		Dictionary::Ptr host_service = make_shared<Dictionary>();

		String agent_filter = vm["agent"].as<std::string>();
		String host_filter = vm["host"].as<std::string>();
		String service_filter;

		host_service->Set("host_filter", host_filter);

		if (vm.count("service")) {
			service_filter = vm["service"].as<std::string>();
			host_service->Set("service_filter", service_filter);
		}

		if (lists->Contains(agent_filter)) {
			Dictionary::Ptr stored_host_service = lists->Get(agent_filter);

			if (stored_host_service->Get("host_filter") == host_filter && !vm.count("service")) {
				Log(LogWarning, "cli")
				    << "Found agent filter '" << agent_filter << "' with host filter '" << host_filter << "'. Bailing out.";
				return 1;
			} else if (stored_host_service->Get("host_filter") == host_filter && stored_host_service->Get("service_filter") == service_filter) {
				Log(LogWarning, "cli")
				    << "Found agent filter '" << agent_filter << "' with host filter '" << host_filter << "' and service filter '"
				    << service_filter << "'. Bailing out.";
				return 1;
			}
		}

		lists->Set(agent_filter, host_service);

		Utility::SaveJsonFile(list_path, lists);

	} else if (m_Command == BlackAndWhitelistCommandList) {
		std::cout << "Listing all " << m_Type << " entries:\n";

		ObjectLock olock(lists);
		BOOST_FOREACH(const Dictionary::Pair& kv, lists) {
			String agent_filter = kv.first;
			Dictionary::Ptr host_service = kv.second;

			std::cout << "Agent " << m_Type << ": '" << agent_filter << "' Host: '"
			    << host_service->Get("host_filter") << "' Service: '" << host_service->Get("service_filter") << "'.\n";
		}
	} else if (m_Command == BlackAndWhitelistCommandRemove) {
		if (!vm.count("agent")) {
			Log(LogCritical, "cli", "At least the agent name filter is required!");
			return 1;
		}
		if (!vm.count("host")) {
			Log(LogCritical, "cli", "At least the host name filter is required!");
			return 1;
		}

		String agent_filter = vm["agent"].as<std::string>();
		String host_filter = vm["host"].as<std::string>();
		String service_filter;

		if (vm.count("service")) {
			service_filter = vm["service"].as<std::string>();
		}

		if (lists->Contains(agent_filter)) {

			Dictionary::Ptr host_service = lists->Get(agent_filter);

			if (host_service->Get("host_filter") == host_filter && !vm.count("service")) {
				Log(LogInformation, "cli")
				    << "Found agent filter '" << agent_filter << "' with host filter '" << host_filter << "'. Removing from " << m_Type << ".";
				lists->Remove(agent_filter);
			} else if (host_service->Get("host_filter") == host_filter && host_service->Get("service_filter") == service_filter) {
				Log(LogInformation, "cli")
				    << "Found agent filter '" << agent_filter << "' with host filter '" << host_filter << "' and service filter '"
				    << service_filter << "'. Removing from " << m_Type << ".";
				lists->Remove(agent_filter);
			} else {
				Log(LogCritical, "cli", "Cannot remove filter!");
				return 1;
			}
		} else {
			Log(LogCritical, "cli", "Cannot remove filter!");
			return 1;
		}

		Utility::SaveJsonFile(list_path, lists);
	}


	return 0;
}