pkt_transform.h

Go to the documentation of this file.

// Copyright (C) 2012-2019 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 PKT_TRANSFORM_H
#define PKT_TRANSFORM_H
 
#include <perfdhcp/localized_option.h>
 
#include <dhcp/option.h>
 
namespace isc {
namespace perfdhcp {
 
class PktTransform {
public:
 
    static bool pack(const dhcp::Option::Universe universe,
                     const dhcp::OptionBuffer& in_buffer,
                     const dhcp::OptionCollection& options,
                     const size_t transid_offset,
                     const uint32_t transid,
                     util::OutputBuffer& out_buffer);
 
    static bool unpack(const dhcp::Option::Universe universe,
                       const dhcp::OptionBuffer& in_buffer,
                       const dhcp::OptionCollection& options,
                       const size_t transid_offset,
                       uint32_t& transid);
 
    static void writeAt(dhcp::OptionBuffer& in_buffer, size_t dest_pos,
                        std::vector<uint8_t>::iterator first,
                        std::vector<uint8_t>::iterator last);
 
    template<typename T>
    static void writeValueAt(dhcp::OptionBuffer& in_buffer, size_t dest_pos,
                        T val) {
        // @todo consider replacing the loop with switch statement
        // checking sizeof(T).
        for (int i = 0; i < sizeof(T); ++i) {
            in_buffer[dest_pos + i] = (val >> 8 * (sizeof(T) - i - 1)) & 0xFF;
        }
    }
 
private:
    static void packOptions(const dhcp::OptionBuffer& in_buffer,
                            const dhcp::OptionCollection& options,
                            util::OutputBuffer& out_buffer);
 
    static void unpackOptions(const dhcp::OptionBuffer& in_buffer,
                              const dhcp::OptionCollection& options);
 
};
 
} // namespace perfdhcp
} // namespace isc
 
#endif // PKT_TRANSFORM_H