added ipban support

commands:
/#ipban <nick>
/#ipunban <ip>

src/ban.cpp

@@ -0,0 +1,118 @@
+/*
+Minetest-c55
+Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "ban.h"
+#include <fstream>
+#include <jmutexautolock.h>
+#include <sstream>
+#include "strfnd.h"
+#include "debug.h"
+
+BanManager::BanManager(const std::string &banfilepath):
+		m_banfilepath(banfilepath),
+		m_modified(false)
+{
+	m_mutex.Init();
+	try{
+		load();
+	}
+	catch(SerializationError &e)
+	{
+		dstream<<"WARNING: BanManager: creating "
+				<<m_banfilepath<<std::endl;
+	}
+}
+
+BanManager::~BanManager()
+{
+	save();
+}
+
+void BanManager::load()
+{
+	JMutexAutoLock lock(m_mutex);
+	dstream<<"BanManager: loading from "<<m_banfilepath<<std::endl;
+	std::ifstream is(m_banfilepath.c_str(), std::ios::binary);
+	if(is.good() == false)
+	{
+		dstream<<"BanManager: failed loading from "<<m_banfilepath<<std::endl;
+		throw SerializationError("BanManager::load(): Couldn't open file");
+	}
+	
+	for(;;)
+	{
+		if(is.eof() || is.good() == false)
+			break;
+		std::string ip;
+		std::getline(is, ip, '\n');
+		m_ips.insert(ip);
+	}
+	m_modified = false;
+}
+
+void BanManager::save()
+{
+	JMutexAutoLock lock(m_mutex);
+	dstream<<"BanManager: saving to "<<m_banfilepath<<std::endl;
+	std::ofstream os(m_banfilepath.c_str(), std::ios::binary);
+	
+	if(os.good() == false)
+	{
+		dstream<<"BanManager: failed loading from "<<m_banfilepath<<std::endl;
+		throw SerializationError("BanManager::load(): Couldn't open file");
+	}
+
+	for(std::set<std::string>::iterator
+			i = m_ips.begin();
+			i != m_ips.end(); i++)
+	{
+		if(*i == "")
+			continue;
+		os<<*i<<"\n";
+	}
+	m_modified = false;
+}
+
+bool BanManager::isIpBanned(std::string ip)
+{
+	JMutexAutoLock lock(m_mutex);
+	return m_ips.find(ip) != m_ips.end();
+}
+
+void BanManager::add(std::string ip)
+{
+	JMutexAutoLock lock(m_mutex);
+	m_ips.insert(ip);
+	m_modified = true;
+}
+
+void BanManager::remove(std::string ip)
+{
+	JMutexAutoLock lock(m_mutex);
+	m_ips.erase(m_ips.find(ip));
+	m_modified = true;
+}
+	
+
+bool BanManager::isModified()
+{
+	JMutexAutoLock lock(m_mutex);
+	return m_modified;
+}
+