packet_writer.h

/*
 * Copyright (c) 2017, Matias Fontanini
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following disclaimer
 *   in the documentation and/or other materials provided with the
 *   distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef TINS_PACKET_WRITER_H
#define TINS_PACKET_WRITER_H

#include <string>
#include <tins/macros.h>
#include <tins/cxxstd.h>
#include <tins/utils/pdu_utils.h>

#ifdef TINS_HAVE_PCAP
#include <pcap.h>
#include <tins/data_link_type.h>

struct timeval;

namespace Tins {
class PDU;
class Packet;

class TINS_API PacketWriter {
public:
    enum LinkType {
        RADIOTAP = DLT_IEEE802_11_RADIO,
        DOT11 = DLT_IEEE802_11,
        ETH2 = DLT_EN10MB,
        DOT3 = DLT_EN10MB,
        SLL = DLT_LINUX_SLL
    };

    template<typename T>
    PacketWriter(const std::string& file_name, const DataLinkType<T>& lt) {
        init(file_name, lt.get_type());
    }

    PacketWriter(const std::string& file_name, LinkType lt);
    
    #if TINS_IS_CXX11

        PacketWriter(PacketWriter &&rhs) TINS_NOEXCEPT {
            *this = std::move(rhs);
        }
        
        PacketWriter& operator=(PacketWriter &&rhs) TINS_NOEXCEPT {
            handle_ = 0;
            dumper_ = 0;
            std::swap(handle_, rhs.handle_);
            std::swap(dumper_, rhs.dumper_);
            return* this;
        }
    #endif
    
    ~PacketWriter();
    
    void write(PDU& pdu);

    void write(Packet& packet);
    
    template<typename T>
    void write(T& pdu) {
        write(Utils::dereference_until_pdu(pdu));
    }
    
    template<typename ForwardIterator>
    void write(ForwardIterator start, ForwardIterator end) {
        while (start != end) {
            write(Utils::dereference_until_pdu(*start++));
        }
    }
private:
    // You shall not copy
    PacketWriter(const PacketWriter&);
    PacketWriter& operator=(const PacketWriter&);

    void init(const std::string& file_name, int link_type);
    void write(PDU& pdu, const struct timeval& tv);

    pcap_t* handle_;
    pcap_dumper_t* dumper_; 
};

} // Tins

#endif // TINS_HAVE_PCAP

#endif // TINS_PACKET_WRITER_H