channel.h

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/*
 * SPDX-License-Identifier: GPL-2.0-only
 */
 
#ifndef NS3_CHANNEL_H
#define NS3_CHANNEL_H
 
#include "ns3/object.h"
#include "ns3/ptr.h"
 
#include <stdint.h>
#include <string>
 
namespace ns3
{
 
class NetDevice;
 
/**
 * \ingroup network
 * \defgroup channel Channel
 */
/**
 * \ingroup channel
 * \brief Abstract Channel Base Class.
 *
 * A channel is a logical path over which information flows.  The path can
 * be as simple as a short piece of wire, or as complicated as space-time.
 *
 * Subclasses must use Simulator::ScheduleWithContext to correctly update
 * event contexts when scheduling an event from one node to another one.
 */
class Channel : public Object
{
  public:
    /**
     * \brief Get the type ID.
     * \return the object TypeId
     */
    static TypeId GetTypeId();
 
    Channel();
    ~Channel() override;
 
    /**
     * \returns the unique id of this channel
     *
     * This unique id happens to be also the index of the Channel into
     * the ChannelList.
     */
    uint32_t GetId() const;
 
    /**
     * \returns the number of NetDevices connected to this Channel.
     *
     * This method must be implemented by subclasses.
     */
    virtual std::size_t GetNDevices() const = 0;
    /**
     * \param i index of NetDevice to retrieve
     * \returns one of the NetDevices connected to this channel.
     *
     * This method must be implemented by subclasses.
     */
    virtual Ptr<NetDevice> GetDevice(std::size_t i) const = 0;
 
  private:
    uint32_t m_id; //!< Channel id for this channel
};
 
} // namespace ns3
 
#endif /* NS3_CHANNEL_H */