pkt_filter_bpf.h

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// Copyright (C) 2014-2017 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_FILTER_BPF_H
#define PKT_FILTER_BPF_H

#include <dhcp/pkt_filter.h>

#include <util/buffer.h>

namespace isc {
namespace dhcp {

class PktFilterBPF : public PktFilter {
public:

    virtual bool isDirectResponseSupported() const {
        return (true);
    }

    virtual SocketInfo openSocket(Iface& iface,
                                  const isc::asiolink::IOAddress& addr,
                                  const uint16_t port,
                                  const bool receive_bcast,
                                  const bool send_bcast);

    virtual Pkt4Ptr receive(Iface& iface, const SocketInfo& socket_info);

    virtual int send(const Iface& iface, uint16_t sockfd,
                     const Pkt4Ptr& pkt);

private:

    void writeAFPseudoHeader(const uint32_t address_family,
                             util::OutputBuffer& out_buf);

};

} // namespace isc::dhcp
} // namespace isc

#endif // PKT_FILTER_BPF_H