dhcp_parsers.h

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// Copyright (C) 2013-2021 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 DHCP_PARSERS_H
#define DHCP_PARSERS_H

#include <asiolink/io_address.h>
#include <cc/data.h>
#include <dhcp/option_definition.h>
#include <dhcp/option_space_container.h>
#include <dhcpsrv/d2_client_cfg.h>
#include <dhcpsrv/cfg_iface.h>
#include <dhcpsrv/cfg_option.h>
#include <dhcpsrv/network.h>
#include <dhcpsrv/subnet.h>
#include <dhcpsrv/cfg_option_def.h>
#include <dhcpsrv/cfg_mac_source.h>
#include <dhcpsrv/srv_config.h>
#include <dhcpsrv/parsers/base_network_parser.h>
#include <cc/simple_parser.h>
#include <exceptions/exceptions.h>
#include <util/optional.h>

#include <boost/shared_ptr.hpp>

#include <stdint.h>
#include <string>
#include <vector>

namespace isc {
namespace dhcp {

typedef OptionSpaceContainer<OptionContainer, OptionDescriptor,
                             std::string> OptionStorage;
typedef boost::shared_ptr<OptionStorage> OptionStoragePtr;

template<typename ValueType>
class ValueStorage {
public:
    void setParam(const std::string& name, const ValueType& value,
                  const data::Element::Position& position) {
        values_[name] = value;
        positions_[name] = position;
    }

    ValueType getParam(const std::string& name) const {
        typename std::map<std::string, ValueType>::const_iterator param
            = values_.find(name);

        if (param == values_.end()) {
            isc_throw(DhcpConfigError, "Missing parameter '"
                      << name << "'");
        }

        return (param->second);
    }

    const data::Element::Position&
    getPosition(const std::string& name, const data::ConstElementPtr parent =
                data::ConstElementPtr()) const {
        typename std::map<std::string, data::Element::Position>::const_iterator
            pos = positions_.find(name);
        if (pos == positions_.end()) {
            return (parent ? parent->getPosition() :
                    data::Element::ZERO_POSITION());
        }

        return (pos->second);
    }

    ValueType getOptionalParam(const std::string& name,
                               const ValueType& default_value) const {
        typename std::map<std::string, ValueType>::const_iterator param
            = values_.find(name);

        if (param == values_.end()) {
            return (default_value);
        }

        return (param->second);
    }

    void delParam(const std::string& name) {
        values_.erase(name);
        positions_.erase(name);
    }

    void clear() {
        values_.clear();
        positions_.clear();
    }

private:
    std::map<std::string, ValueType> values_;

    std::map<std::string, data::Element::Position> positions_;

};

typedef std::pair<std::string, isc::data::ConstElementPtr> ConfigPair;

typedef ValueStorage<uint32_t> Uint32Storage;
typedef boost::shared_ptr<Uint32Storage> Uint32StoragePtr;

typedef ValueStorage<std::string> StringStorage;
typedef boost::shared_ptr<StringStorage> StringStoragePtr;

typedef ValueStorage<bool> BooleanStorage;
typedef boost::shared_ptr<BooleanStorage> BooleanStoragePtr;

class MACSourcesListConfigParser : public isc::data::SimpleParser {
public:
    void parse(CfgMACSource& mac_sources, isc::data::ConstElementPtr value);
};

class ControlSocketParser : public isc::data::SimpleParser {
public:
    void parse(SrvConfig& srv_cfg, isc::data::ConstElementPtr value);
};

class OptionDefParser : public isc::data::SimpleParser {
public:
    OptionDefParser(const uint16_t address_family);

    OptionDefinitionPtr parse(isc::data::ConstElementPtr option_def);

private:
    uint16_t address_family_;
};

class OptionDefListParser : public isc::data::SimpleParser {
public:
    OptionDefListParser(const uint16_t address_family);

    void parse(CfgOptionDefPtr cfg, isc::data::ConstElementPtr def_list);

private:
    uint16_t address_family_;
};

typedef std::vector<PoolPtr> PoolStorage;
typedef boost::shared_ptr<PoolStorage> PoolStoragePtr;

class PoolParser : public isc::data::SimpleParser {
public:

    virtual ~PoolParser() {
    }

    virtual void parse(PoolStoragePtr pools,
                       isc::data::ConstElementPtr pool_structure,
                       const uint16_t address_family);

protected:
    virtual PoolPtr poolMaker(isc::asiolink::IOAddress &addr, uint32_t len,
                              int32_t ptype = 0) = 0;

    virtual PoolPtr poolMaker(isc::asiolink::IOAddress &min,
                              isc::asiolink::IOAddress &max,
                              int32_t ptype = 0) = 0;
};

class Pool4Parser : public PoolParser {
protected:
    PoolPtr poolMaker (asiolink::IOAddress &addr, uint32_t len,
                       int32_t ignored);

    PoolPtr poolMaker (asiolink::IOAddress &min, asiolink::IOAddress &max,
                       int32_t ignored);
};

class PoolsListParser : public isc::data::SimpleParser {
public:

    virtual ~PoolsListParser() {
    }

    virtual void parse(PoolStoragePtr pools,
                       isc::data::ConstElementPtr pools_list) = 0;
};

class Pools4ListParser : PoolsListParser {
public:

    void parse(PoolStoragePtr pools, data::ConstElementPtr pools_list);
};

class RelayInfoParser : public isc::data::SimpleParser {
public:

    explicit RelayInfoParser(const isc::dhcp::Option::Universe& family);

    void parse(const isc::dhcp::Network::RelayInfoPtr& relay_info,
               isc::data::ConstElementPtr relay_elem);

    void addAddress(const std::string& name, const std::string& address_str,
                    isc::data::ConstElementPtr relay_elem,
                    const isc::dhcp::Network::RelayInfoPtr& relay_info);
private:

    Option::Universe family_;
};

class SubnetConfigParser : public BaseNetworkParser {
public:

    explicit SubnetConfigParser(uint16_t family, bool check_iface = true);

    virtual ~SubnetConfigParser() { }

protected:
    SubnetPtr parse(isc::data::ConstElementPtr subnet);

    virtual void initSubnet(isc::data::ConstElementPtr params,
                            isc::asiolink::IOAddress addr, uint8_t len) = 0;

private:

    void createSubnet(isc::data::ConstElementPtr data);

protected:

    PoolStoragePtr pools_;

    isc::dhcp::SubnetPtr subnet_;

    uint16_t address_family_;

    isc::dhcp::Network::RelayInfoPtr relay_info_;

    CfgOptionPtr options_;

    bool check_iface_;
};

class Subnet4ConfigParser : public SubnetConfigParser {
public:
    Subnet4ConfigParser(bool check_iface = true);

    Subnet4Ptr parse(data::ConstElementPtr subnet);

protected:

    void initSubnet(data::ConstElementPtr params,
                    asiolink::IOAddress addr, uint8_t len);

    void validateResv(const Subnet4Ptr& subnet, ConstHostPtr host);
};

class Subnets4ListConfigParser : public isc::data::SimpleParser {
public:

    Subnets4ListConfigParser(bool check_iface = true);

    size_t parse(SrvConfigPtr cfg, data::ConstElementPtr subnets_list);

    size_t parse(Subnet4Collection& subnets,
                 data::ConstElementPtr subnets_list);

protected:

    bool check_iface_;
};

class Pool6Parser : public PoolParser {
protected:
    PoolPtr poolMaker (asiolink::IOAddress &addr, uint32_t len, int32_t ptype);

    PoolPtr poolMaker (asiolink::IOAddress &min, asiolink::IOAddress &max,
                       int32_t ptype);
};

class Pools6ListParser : PoolsListParser {
public:

    void parse(PoolStoragePtr pools, data::ConstElementPtr pools_list);
};

class PdPoolParser : public isc::data::SimpleParser {
public:

    PdPoolParser();

    void parse(PoolStoragePtr pools, data::ConstElementPtr pd_pool_);

private:

    isc::dhcp::Pool6Ptr pool_;

    CfgOptionPtr options_;

    isc::data::ConstElementPtr user_context_;

    isc::data::ConstElementPtr client_class_;
};

class PdPoolsListParser : public PoolsListParser {
public:

    void parse(PoolStoragePtr pools, data::ConstElementPtr pd_pool_list);
};

class Subnet6ConfigParser : public SubnetConfigParser {
public:

    Subnet6ConfigParser(bool check_iface = true);

    Subnet6Ptr parse(data::ConstElementPtr subnet);

protected:
    virtual void duplicate_option_warning(uint32_t code,
                                         asiolink::IOAddress& addr);

    void initSubnet(isc::data::ConstElementPtr params,
                    isc::asiolink::IOAddress addr, uint8_t len);

    void validateResvs(const Subnet6Ptr& subnet, ConstHostPtr host);
};


class Subnets6ListConfigParser : public isc::data::SimpleParser {
public:

    Subnets6ListConfigParser(bool check_iface = true);

    size_t parse(SrvConfigPtr cfg, data::ConstElementPtr subnets_list);

    size_t parse(Subnet6Collection& subnets,
                 data::ConstElementPtr subnets_list);

protected:

    bool check_iface_;
};

class D2ClientConfigParser : public  isc::data::SimpleParser {
public:

    D2ClientConfigPtr parse(isc::data::ConstElementPtr d2_client_cfg);

    static const isc::data::SimpleDefaults D2_CLIENT_CONFIG_DEFAULTS;

    //  to ElementPtr)
    static size_t setAllDefaults(isc::data::ConstElementPtr d2_config);

private:

    dhcp_ddns::NameChangeProtocol
    getProtocol(isc::data::ConstElementPtr scope, const std::string& name);

    dhcp_ddns::NameChangeFormat
    getFormat(isc::data::ConstElementPtr scope, const std::string& name);

    D2ClientConfig::ReplaceClientNameMode
    getMode(isc::data::ConstElementPtr scope, const std::string& name);
};

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

#endif // DHCP_PARSERS_H