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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* 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.
*/
#pragma once
#include "config.h"
#include "bpf-filter.hh"
#include "iputils.hh"
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/ordered_index.hpp>
class DynBPFFilter
{
public:
DynBPFFilter(std::shared_ptr<BPFFilter>& bpf)
{
d_data.lock()->d_bpf = bpf;
}
~DynBPFFilter()
{
}
void excludeRange(const Netmask& range)
{
d_data.lock()->d_excludedSubnets.addMask(range);
}
void includeRange(const Netmask& range)
{
d_data.lock()->d_excludedSubnets.addMask(range, false);
}
/* returns true if the addr wasn't already blocked, false otherwise */
bool block(const ComboAddress& addr, const struct timespec& until);
void purgeExpired(const struct timespec& now);
std::vector<std::tuple<ComboAddress, uint64_t, struct timespec> > getAddrStats();
private:
struct BlockEntry
{
BlockEntry(const ComboAddress& addr, const struct timespec until): d_addr(addr), d_until(until)
{
}
ComboAddress d_addr;
struct timespec d_until;
};
typedef multi_index_container<BlockEntry,
indexed_by <
ordered_unique< member<BlockEntry,ComboAddress,&BlockEntry::d_addr>, ComboAddress::addressOnlyLessThan >,
ordered_non_unique< member<BlockEntry,struct timespec,&BlockEntry::d_until> >
>
> container_t;
struct Data {
container_t d_entries;
std::shared_ptr<BPFFilter> d_bpf{nullptr};
NetmaskGroup d_excludedSubnets;
};
LockGuarded<Data> d_data;
};
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