mysql_lease_mgr.h

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// Copyright (C) 2012-2023 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 MYSQL_LEASE_MGR_H
#define MYSQL_LEASE_MGR_H
 
#include <asiolink/io_service.h>
#include <dhcp/hwaddr.h>
#include <dhcpsrv/dhcpsrv_exceptions.h>
#include <dhcpsrv/tracking_lease_mgr.h>
#include <mysql/mysql_connection.h>
 
#include <boost/scoped_ptr.hpp>
#include <boost/utility.hpp>
#include <mysql.h>
 
#include <time.h>
#include <vector>
#include <mutex>
 
namespace isc {
namespace dhcp {
 
// Forward declaration of the Lease exchange objects.  These classes are defined
// in the .cc file.
class MySqlLease4Exchange;
class MySqlLease6Exchange;
 
class MySqlLeaseContext {
public:
 
    MySqlLeaseContext(const db::DatabaseConnection::ParameterMap& parameters,
                      db::IOServiceAccessorPtr io_service_accessor,
                      db::DbCallback db_reconnect_callback);
 
    boost::scoped_ptr<MySqlLease4Exchange> exchange4_; 
    boost::scoped_ptr<MySqlLease6Exchange> exchange6_; 
 
    db::MySqlConnection conn_;
};
 
typedef boost::shared_ptr<MySqlLeaseContext> MySqlLeaseContextPtr;
 
class MySqlLeaseContextPool {
public:
 
    std::vector<MySqlLeaseContextPtr> pool_;
 
    std::mutex mutex_;
};
 
typedef boost::shared_ptr<MySqlLeaseContextPool> MySqlLeaseContextPoolPtr;
 
 
class MySqlLeaseMgr : public TrackingLeaseMgr {
public:
 
    MySqlLeaseMgr(const db::DatabaseConnection::ParameterMap& parameters);
 
    virtual ~MySqlLeaseMgr();
 
    MySqlLeaseContextPtr createContext() const;
 
    static bool dbReconnect(util::ReconnectCtlPtr db_reconnect_ctl);
 
    static std::string getDBVersion();
 
    virtual bool addLease(const Lease4Ptr& lease) override;
 
    virtual bool addLease(const Lease6Ptr& lease) override;
 
    virtual Lease4Ptr getLease4(const isc::asiolink::IOAddress& addr) const override;
 
    virtual Lease4Collection getLease4(const isc::dhcp::HWAddr& hwaddr) const override;
 
    virtual Lease4Ptr getLease4(const isc::dhcp::HWAddr& hwaddr,
                                SubnetID subnet_id) const override;
 
    virtual Lease4Collection getLease4(const ClientId& clientid) const override;
 
    virtual Lease4Ptr getLease4(const ClientId& clientid,
                                SubnetID subnet_id) const override;
 
    virtual Lease4Collection getLeases4(SubnetID subnet_id) const override;
 
    virtual Lease4Collection getLeases4(const std::string& hostname) const override;
 
    virtual Lease4Collection getLeases4() const override;
 
    virtual Lease4Collection
    getLeases4(const asiolink::IOAddress& lower_bound_address,
               const LeasePageSize& page_size) const override;
 
    virtual Lease6Ptr getLease6(Lease::Type type,
                                const isc::asiolink::IOAddress& addr) const override;
 
    virtual Lease6Collection getLeases6(Lease::Type type, const DUID& duid,
                                        uint32_t iaid) const override;
 
    virtual Lease6Collection getLeases6(Lease::Type type, const DUID& duid,
                                        uint32_t iaid, SubnetID subnet_id) const override;
 
    virtual Lease6Collection getLeases6(SubnetID subnet_id) const override;
 
    virtual Lease6Collection getLeases6(const std::string& hostname) const override;
 
    virtual Lease6Collection getLeases6() const override;
 
    virtual Lease6Collection getLeases6(const DUID& duid) const override;
 
    virtual Lease6Collection
    getLeases6(const asiolink::IOAddress& lower_bound_address,
               const LeasePageSize& page_size) const override;
 
    virtual void getExpiredLeases4(Lease4Collection& expired_leases,
                                   const size_t max_leases) const override;
 
    virtual void getExpiredLeases6(Lease6Collection& expired_leases,
                                   const size_t max_leases) const override;
 
    virtual void updateLease4(const Lease4Ptr& lease4) override;
 
    virtual void updateLease6(const Lease6Ptr& lease6) override;
 
    virtual bool deleteLease(const Lease4Ptr& lease) override;
 
    virtual bool deleteLease(const Lease6Ptr& lease) override;
 
    virtual uint64_t deleteExpiredReclaimedLeases4(const uint32_t secs) override;
 
    virtual uint64_t deleteExpiredReclaimedLeases6(const uint32_t secs) override;
 
    virtual LeaseStatsQueryPtr startLeaseStatsQuery4() override;
 
    virtual LeaseStatsQueryPtr startPoolLeaseStatsQuery4() override;
 
    virtual LeaseStatsQueryPtr startSubnetLeaseStatsQuery4(const SubnetID& subnet_id) override;
 
    virtual LeaseStatsQueryPtr startSubnetRangeLeaseStatsQuery4(const SubnetID& first_subnet_id,
                                                                const SubnetID& last_subnet_id) override;
 
    virtual LeaseStatsQueryPtr startLeaseStatsQuery6() override;
 
    virtual LeaseStatsQueryPtr startPoolLeaseStatsQuery6() override;
 
    virtual LeaseStatsQueryPtr startSubnetLeaseStatsQuery6(const SubnetID& subnet_id) override;
 
    virtual LeaseStatsQueryPtr startSubnetRangeLeaseStatsQuery6(const SubnetID& first_subnet_id,
                                                                const SubnetID& last_subnet_id) override;
 
    virtual size_t wipeLeases4(const SubnetID& subnet_id) override;
 
    virtual size_t wipeLeases6(const SubnetID& subnet_id) override;
 
    virtual std::string getType() const override {
        return (std::string("mysql"));
    }
 
    virtual std::string getName() const override;
 
    virtual std::string getDescription() const override;
 
    virtual std::pair<uint32_t, uint32_t> getVersion() const override;
 
    virtual void commit() override;
 
    virtual void rollback() override;
 
    enum StatementIndex {
        DELETE_LEASE4,               // Delete from lease4 by address
        DELETE_LEASE4_STATE_EXPIRED, // Delete expired lease4 in a given state
        DELETE_LEASE6,               // Delete from lease6 by address
        DELETE_LEASE6_STATE_EXPIRED, // Delete expired lease6 in a given state
        GET_LEASE4,                  // Get all IPv4 leases
        GET_LEASE4_ADDR,             // Get lease4 by address
        GET_LEASE4_CLIENTID,         // Get lease4 by client ID
        GET_LEASE4_CLIENTID_SUBID,   // Get lease4 by client ID & subnet ID
        GET_LEASE4_HWADDR,           // Get lease4 by HW address
        GET_LEASE4_HWADDR_SUBID,     // Get lease4 by HW address & subnet ID
        GET_LEASE4_PAGE,             // Get page of leases beginning with an address
        GET_LEASE4_UCTX_PAGE,        // Get page of leases with user context
        GET_LEASE4_SUBID,            // Get IPv4 leases by subnet ID
        GET_LEASE4_HOSTNAME,         // Get IPv4 leases by hostname
        GET_LEASE4_EXPIRE,           // Get lease4 by expiration.
        GET_LEASE4_RELAYID,          // Get page of lease by relay ID.
        GET_LEASE4_RELAYID_QST,      // Get page of leases by relay ID and query start time.
        GET_LEASE4_RELAYID_QSET,     // Get page of leases by relay ID and query start and end times.
        GET_LEASE4_RELAYID_QET,      // Get page of leases by relay ID and query end time.
        GET_LEASE4_REMOTEID,         // Get page of lease by remote ID.
        GET_LEASE4_REMOTEID_QST,     // Get page of leases by remote ID and query start time.
        GET_LEASE4_REMOTEID_QSET,    // Get page of leases by remote ID and query start and end times.
        GET_LEASE4_REMOTEID_QET,     // Get page of leases by remote ID and query end time.
        GET_LEASE6,                  // Get all IPv6 leases
        GET_LEASE6_ADDR,             // Get lease6 by address and type
        GET_LEASE6_DUID_IAID,        // Get lease6 by DUID and IAID
        GET_LEASE6_DUID_IAID_SUBID,  // Get lease6 by DUID, IAID and subnet ID
        GET_LEASE6_PAGE,             // Get page of leases beginning with an address
        GET_LEASE6_UCTX_PAGE,        // Get page of leases with user context
        GET_LEASE6_SUBID,            // Get IPv6 leases by subnet ID
        GET_LEASE6_DUID,             // Get IPv6 leases by DUID
        GET_LEASE6_HOSTNAME,         // Get IPv6 leases by hostname
        GET_LEASE6_EXPIRE,           // Get lease6 by expiration.
        GET_LEASE6_LINK,             // Get page of lease6 by link
        INSERT_LEASE4,               // Add entry to lease4 table
        INSERT_LEASE6,               // Add entry to lease6 table
        UPDATE_LEASE4,               // Update a Lease4 entry
        UPDATE_LEASE6,               // Update a Lease6 entry
        ALL_LEASE4_STATS,            // Fetches IPv4 lease statistics
        SUBNET_LEASE4_STATS,         // Fetched IPv4 lease stats for a single subnet.
        SUBNET_RANGE_LEASE4_STATS,   // Fetched IPv4 lease stats for a subnet range.
        ALL_POOL_LEASE4_STATS,       // Fetches IPv4 lease pool statistics
        ALL_LEASE6_STATS,            // Fetches IPv6 lease statistics
        SUBNET_LEASE6_STATS,         // Fetched IPv6 lease stats for a single subnet.
        SUBNET_RANGE_LEASE6_STATS,   // Fetched IPv6 lease stats for a subnet range.
        ALL_POOL_LEASE6_STATS,       // Fetches IPv6 lease pool statistics
        CHECK_LEASE4_LIMITS,         // Check if allocated IPv4 leases are inside the set limits.
        CHECK_LEASE6_LIMITS,         // Check if allocated IPv6 leases are inside the set limits.
        IS_JSON_SUPPORTED,           // Checks if JSON support is enabled in the database.
        GET_LEASE4_COUNT_BY_CLASS,   // Fetches the IPv4 lease count for a given class.
        GET_LEASE6_COUNT_BY_CLASS,   // Fetches the IPv6 lease count for given class and lease type.
        WIPE_RELAY_ID6,              // Wipe the lease6_relay_id table
        WIPE_REMOTE_ID6,             // Wipe the lease6_remote_id table
        DELETE_RELAY_ID6,            // Delete a lease6_relay_id entry by address
        DELETE_REMOTE_ID6,           // Delete a lease6_remote_id entry by address
        ADD_RELAY_ID6,               // Add a lease6_relay_id entry
        ADD_REMOTE_ID6,              // Add a lease6_remote_id entry
        GET_RELAY_ID6,               // Get lease6_relay_id entries
        GET_REMOTE_ID6,              // Get lease6_remote_id entries
        GET_RELAY_ID6_LINK,          // Get lease6_relay_id entries by link
        GET_REMOTE_ID6_LINK,         // Get lease6_remote_id entries by link
        COUNT_RELAY_ID6,             // Count the lease6_relay_id number of entries
        COUNT_REMOTE_ID6,            // Count the lease6_remote_id number of entries
        NUM_STATEMENTS               // Number of statements
    };
 
private:
 
    bool addLeaseCommon(MySqlLeaseContextPtr& ctx,
                        StatementIndex stindex, std::vector<MYSQL_BIND>& bind);
 
    template <typename Exchange, typename LeaseCollection>
    void getLeaseCollection(MySqlLeaseContextPtr& ctx,
                            StatementIndex stindex,
                            MYSQL_BIND* bind,
                            Exchange& exchange, LeaseCollection& result,
                            bool single = false) const;
 
    void getLeaseCollection(MySqlLeaseContextPtr& ctx,
                            StatementIndex stindex,
                            MYSQL_BIND* bind,
                            Lease4Collection& result) const {
        getLeaseCollection(ctx, stindex, bind, ctx->exchange4_, result);
    }
 
    void getLeaseCollection(MySqlLeaseContextPtr& ctx,
                            StatementIndex stindex,
                            MYSQL_BIND* bind,
                            Lease6Collection& result) const {
        getLeaseCollection(ctx, stindex, bind, ctx->exchange6_, result);
    }
 
    void getLease(MySqlLeaseContextPtr& ctx,
                  StatementIndex stindex,
                  MYSQL_BIND* bind,
                  Lease4Ptr& result) const;
 
    void getLease(MySqlLeaseContextPtr& ctx,
                  StatementIndex stindex,
                  MYSQL_BIND* bind,
                  Lease6Ptr& result) const;
 
    template<typename LeaseCollection>
    void getExpiredLeasesCommon(LeaseCollection& expired_leases,
                                const size_t max_leases,
                                StatementIndex statement_index) const;
 
    template <typename LeasePtr>
    void updateLeaseCommon(MySqlLeaseContextPtr& ctx,
                           StatementIndex stindex,
                           MYSQL_BIND* bind,
                           const LeasePtr& lease);
 
    uint64_t deleteLeaseCommon(MySqlLeaseContextPtr& ctx,
                               StatementIndex stindex,
                               MYSQL_BIND* bind);
 
    uint64_t deleteExpiredReclaimedLeasesCommon(const uint32_t secs,
                                                StatementIndex statement_index);
 
    std::string
    checkLimits(isc::data::ConstElementPtr const& user_context, StatementIndex const stindex) const;
 
    virtual std::string
    checkLimits4(isc::data::ConstElementPtr const& user_context) const override;
 
    virtual std::string
    checkLimits6(isc::data::ConstElementPtr const& user_context) const override;
 
    virtual bool isJsonSupported() const override;
 
    virtual size_t getClassLeaseCount(const ClientClass& client_class,
                                      const Lease::Type& ltype = Lease::TYPE_V4) const override;
 
    virtual void recountClassLeases4() override;
 
    virtual void recountClassLeases6() override;
 
    virtual void clearClassLeaseCounts() override;
 
    virtual void writeLeases4(const std::string& /*filename*/) override;
 
    virtual void writeLeases6(const std::string& /*filename*/) override;
 
    void checkError(MySqlLeaseContextPtr& ctx,
                    int status, StatementIndex index,
                    const char* what) const;
 
public:
 
    virtual Lease4Collection
    getLeases4ByRelayId(const OptionBuffer& relay_id,
                        const asiolink::IOAddress& lower_bound_address,
                        const LeasePageSize& page_size,
                        const time_t& qry_start_time = 0,
                        const time_t& qry_end_time = 0) override;
 
    virtual Lease4Collection
    getLeases4ByRemoteId(const OptionBuffer& remote_id,
                         const asiolink::IOAddress& lower_bound_address,
                         const LeasePageSize& page_size,
                         const time_t& qry_start_time = 0,
                         const time_t& qry_end_time = 0) override;
 
    virtual Lease6Collection
    getLeases6ByRelayId(const DUID& relay_id,
                        const asiolink::IOAddress& link_addr,
                        uint8_t link_len,
                        const asiolink::IOAddress& lower_bound_address,
                        const LeasePageSize& page_size) override;
 
    virtual Lease6Collection
    getLeases6ByRemoteId(const OptionBuffer& remote_id,
                         const asiolink::IOAddress& link_addr,
                         uint8_t link_len,
                         const asiolink::IOAddress& lower_bound_address,
                         const LeasePageSize& page_size) override;
 
    virtual Lease6Collection
    getLeases6ByLink(const asiolink::IOAddress& link_addr,
                     uint8_t link_len,
                     const asiolink::IOAddress& lower_bound_address,
                     const LeasePageSize& page_size) override;
 
    virtual size_t upgradeExtendedInfo4(const LeasePageSize& page_size) override;
 
    virtual size_t upgradeExtendedInfo6(const LeasePageSize& page_size) override;
 
    virtual void wipeExtendedInfoTables6() override;
 
    virtual size_t byRelayId6size() const override;
 
    virtual size_t byRemoteId6size() const override;
 
private:
    class MySqlLeaseContextAlloc {
    public:
 
        MySqlLeaseContextAlloc(const MySqlLeaseMgr& mgr);
 
        ~MySqlLeaseContextAlloc();
 
        MySqlLeaseContextPtr ctx_;
 
    private:
 
        const MySqlLeaseMgr& mgr_;
    };
 
    class MySqlLeaseTrackingContextAlloc {
    public:
 
        MySqlLeaseTrackingContextAlloc(MySqlLeaseMgr& mgr, const LeasePtr& lease);
 
        ~MySqlLeaseTrackingContextAlloc();
 
        MySqlLeaseContextPtr ctx_;
 
    private:
 
        MySqlLeaseMgr& mgr_;
 
        LeasePtr lease_;
    };
 
protected:
 
 
    virtual void deleteExtendedInfo6(const isc::asiolink::IOAddress& addr) override;
 
    virtual void addRelayId6(const isc::asiolink::IOAddress& lease_addr,
                             const std::vector<uint8_t>& relay_id) override;
 
    virtual void addRemoteId6(const isc::asiolink::IOAddress& lease_addr,
                              const std::vector<uint8_t>& remote_id) override;
 
private:
    void deleteRelayId6(const isc::asiolink::IOAddress& addr);
 
    void deleteRemoteId6(const isc::asiolink::IOAddress& addr);
 
    // Members
 
    db::DatabaseConnection::ParameterMap parameters_;
 
    MySqlLeaseContextPoolPtr pool_;
 
    std::string timer_name_;
};
 
}  // namespace dhcp
}  // namespace isc
 
#endif // MYSQL_LEASE_MGR_H