RBL.h

#ifndef RBL_H
#define RBL_H

class RBL
{
public:
    bool check(const char* ip);
private:
    struct IP2TYPE
    {
        const char* type;
        const IP4_ADDRESS ip;
    };
    struct RBLINFO
    {
        const IP2TYPE* types;
        unsigned int numberOfTypes;
        const char* domain;
    };

    /*
      \brief Returns a RBL server to do the lookup on - for now only SpamHaus ZEN
    */
    void get_RBL_info(RBLINFO* info);

    /*
      \brief This function does the actual lookup.
      \param name The domain to lookup.
      \param result The resulting IP
      \return True if the domain could be resolved to a IP - in that case the result needs to be checked further.
        If it returns false the IP isn't blacklisted
    */
    bool lookup(const char* name, PIP4_ADDRESS result);
    /*
      \brief The RBL server expects the IP reversed. This function builds the lookup domain
      \param ip The IP which shall be looked up
      \param end What shall be appended to build the final lookup domain
      \param result Output param.
    */
    void build_request_domain(const std::string& ip, const std::string& end, std::string& result);
};
#endif // RBL_H