pool.h

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// Copyright (C) 2012-2020 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef POOL_H
#define POOL_H

#include <asiolink/io_address.h>
#include <cc/data.h>
#include <cc/user_context.h>
#include <dhcp/classify.h>
#include <dhcp/option6_pdexclude.h>
#include <dhcpsrv/cfg_option.h>
#include <dhcpsrv/lease.h>
#include <dhcpsrv/ip_range_permutation.h>

#include <boost/shared_ptr.hpp>

#include <vector>

namespace isc {
namespace dhcp {

class Pool : public isc::data::UserContext, public isc::data::CfgToElement {

public:

    uint32_t getId() const {
        return (id_);
    }

    const isc::asiolink::IOAddress& getFirstAddress() const {
        return (first_);
    }

    const isc::asiolink::IOAddress& getLastAddress() const {
        return (last_);
    }

    bool inRange(const isc::asiolink::IOAddress& addr) const;

    Lease::Type getType() const {
        return (type_);
    }

    virtual std::string toText() const;

    virtual ~Pool() {
    }

    uint64_t getCapacity() const {
        return (capacity_);
    }

    CfgOptionPtr getCfgOption() {
        return (cfg_option_);
    }

    ConstCfgOptionPtr getCfgOption() const {
        return (cfg_option_);
    }

    bool clientSupported(const ClientClasses& client_classes) const;

    void allowClientClass(const ClientClass& class_name);

    const ClientClass& getClientClass() const {
        return (client_class_);
    }

    void requireClientClass(const ClientClass& class_name) {
        if (!required_classes_.contains(class_name)) {
            required_classes_.insert(class_name);
        }
    }

    const ClientClasses& getRequiredClasses() const {
        return (required_classes_);
    }

    isc::asiolink::IOAddress getLastAllocated() const {
        return last_allocated_;
    }

    bool isLastAllocatedValid() const {
        return last_allocated_valid_;
    }

    void setLastAllocated(const isc::asiolink::IOAddress& addr) {
        last_allocated_ = addr;
        last_allocated_valid_ = true;
    }

    void resetLastAllocated() {
        last_allocated_valid_ = false;
    }

    virtual data::ElementPtr toElement() const;

    IPRangePermutationPtr getPermutation() const {
        return (permutation_);
    }

protected:

    Pool(Lease::Type type,
         const isc::asiolink::IOAddress& first,
         const isc::asiolink::IOAddress& last);

    static uint32_t getNextID() {
        static uint32_t id = 0;
        return (id++);
    }

    uint32_t id_;

    isc::asiolink::IOAddress first_;

    isc::asiolink::IOAddress last_;

    Lease::Type type_;

    uint64_t capacity_;

    CfgOptionPtr cfg_option_;

    ClientClass client_class_;

    ClientClasses required_classes_;

    data::ConstElementPtr user_context_;

    isc::asiolink::IOAddress last_allocated_;

    bool last_allocated_valid_;

    IPRangePermutationPtr permutation_;
};

class Pool4;

typedef boost::shared_ptr<Pool4> Pool4Ptr;

class Pool4 : public Pool {
public:
    Pool4(const isc::asiolink::IOAddress& first,
          const isc::asiolink::IOAddress& last);

    Pool4(const isc::asiolink::IOAddress& prefix,
          uint8_t prefix_len);

    static Pool4Ptr create(const isc::asiolink::IOAddress& first,
                           const isc::asiolink::IOAddress& last);

    static Pool4Ptr create(const isc::asiolink::IOAddress& prefix,
                           uint8_t prefix_len);

    virtual data::ElementPtr toElement() const;
};

class Pool6;

typedef boost::shared_ptr<Pool6> Pool6Ptr;

class Pool6 : public Pool {
public:

    Pool6(Lease::Type type, const isc::asiolink::IOAddress& first,
          const isc::asiolink::IOAddress& last);

    Pool6(Lease::Type type, const isc::asiolink::IOAddress& prefix,
          uint8_t prefix_len, uint8_t delegated_len = 128);

    Pool6(const asiolink::IOAddress& prefix, const uint8_t prefix_len,
          const uint8_t delegated_len,
          const asiolink::IOAddress& excluded_prefix,
          const uint8_t excluded_prefix_len);

    static Pool6Ptr create(Lease::Type type,
                           const isc::asiolink::IOAddress& first,
                           const isc::asiolink::IOAddress& last);

    static Pool6Ptr create(Lease::Type type,
                           const isc::asiolink::IOAddress& prefix,
                           uint8_t prefix_len,
                           uint8_t delegated_len = 128);

    static Pool6Ptr create(const asiolink::IOAddress& prefix,
                           const uint8_t prefix_len,
                           const uint8_t delegated_len,
                           const asiolink::IOAddress& excluded_prefix,
                           const uint8_t excluded_prefix_len);

    Lease::Type getType() const {
        return (type_);
    }

    uint8_t getLength() const {
        return (prefix_len_);
    }

    Option6PDExcludePtr getPrefixExcludeOption() const {
        return (pd_exclude_option_);
    }

    virtual data::ElementPtr toElement() const;

    virtual std::string toText() const;

private:

    void init(const Lease::Type& type,
              const asiolink::IOAddress& prefix,
              const uint8_t prefix_len,
              const uint8_t delegated_len,
              const asiolink::IOAddress& excluded_prefix,
              const uint8_t excluded_prefix_len);

    uint8_t prefix_len_;

    Option6PDExcludePtr pd_exclude_option_;

};

typedef boost::shared_ptr<Pool> PoolPtr;

typedef std::vector<PoolPtr> PoolCollection;


} // end of isc::dhcp namespace
} // end of isc namespace


#endif // POOL_H