221 lines
7.7 KiB
C
221 lines
7.7 KiB
C
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#ifndef SWITCH_NET_DEVICE_H
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#define SWITCH_NET_DEVICE_H
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#include "switch-channel.h"
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#include "ns3/net-device.h"
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#include "ns3/mac48-address.h"
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#include "ns3/net-device.h"
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#include "ns3/nstime.h"
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#include "ns3/simulator.h"
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#include <map>
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#include <stdint.h>
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#include <string>
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/**
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* \file
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* \ingroup ethernet
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* ns3::SwitchNetDevice declaration.
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*/
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namespace ns3
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{
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class Node;
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/**
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* \brief a virtual net device that bridges multiple LAN segments
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*
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* The SwitchNetDevice object is a "virtual" netdevice that aggregates
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* multiple "real" netdevices and implements the data plane forwarding
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* part of IEEE 802.1D. By adding a SwitchNetDevice to a Node, it
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* will act as a "switch" to multiple LAN segments.
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*
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* \attention The switch netdevice don't implement a "Learning bridge" algorithm
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* or Spanning Tree Protocol as described in 802.1D
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*
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* \attention Switching is designed to work only with Ethernet NetDevices
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* modelling IEEE 802-style technologies, such as EthernetNetDevice
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*/
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/**
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* \ingroup ethernet
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* \brief a virtual net device that bridges multiple LAN segments
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*/
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class SwitchNetDevice : public NetDevice
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{
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public:
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/**
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* \brief Get the type ID.
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* \return the object TypeId
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*/
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static TypeId GetTypeId();
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SwitchNetDevice();
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~SwitchNetDevice() override;
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// Delete copy constructor and assignment operator to avoid misuse
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SwitchNetDevice(const SwitchNetDevice&) = delete;
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SwitchNetDevice& operator=(const SwitchNetDevice&) = delete;
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/**
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* \brief Add a 'port' to a switch device
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* \param switchPort the NetDevice to add
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*
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* This method adds a new switch port to a SwitchNetDevice, so that
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* the new switch port NetDevice becomes part of the switch and L2
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* frames start being forwarded to/from this NetDevice.
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*
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* \attention The netdevice that is being added as switch port must
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* _not_ have an IP address. In order to add IP connectivity to a
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* bridging node you must enable IP on the SwitchNetDevice itself,
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* never on its port netdevices.
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*/
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void AddSwitchPort(Ptr<NetDevice> switchPort);
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/**
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* \brief Gets the number of switched 'ports', i.e., the NetDevices currently switched.
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*
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* \return the number of switched ports.
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*/
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uint32_t GetNSwitchPorts() const;
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/**
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* \brief Gets the n-th switched port.
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* \param n the port index
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* \return the n-th switched NetDevice
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*/
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Ptr<NetDevice> GetSwitchPort(uint32_t n) const;
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// inherited from NetDevice base class.
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void SetIfIndex(const uint32_t index) override;
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uint32_t GetIfIndex() const override;
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Ptr<Channel> GetChannel() const override;
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void SetAddress(Address address) override;
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Address GetAddress() const override;
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bool SetMtu(const uint16_t mtu) override;
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uint16_t GetMtu() const override;
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bool IsLinkUp() const override;
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void AddLinkChangeCallback(Callback<void> callback) override;
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bool IsBroadcast() const override;
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Address GetBroadcast() const override;
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bool IsMulticast() const override;
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Address GetMulticast(Ipv4Address multicastGroup) const override;
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bool IsPointToPoint() const override;
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bool IsBridge() const override;
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bool Send(Ptr<Packet> packet, const Address& dest, uint16_t protocolNumber) override;
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bool SendFrom(Ptr<Packet> packet,
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const Address& source,
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const Address& dest,
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uint16_t protocolNumber) override;
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Ptr<Node> GetNode() const override;
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void SetNode(Ptr<Node> node) override;
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bool NeedsArp() const override;
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void SetReceiveCallback(NetDevice::ReceiveCallback cb) override;
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void SetPromiscReceiveCallback(NetDevice::PromiscReceiveCallback cb) override;
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bool SupportsSendFrom() const override;
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Address GetMulticast(Ipv6Address addr) const override;
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/**
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* \brief Add a entry to the forwarding table
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* \param dest destination mac
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* \param vid Vlan ID
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* \param outPorts vector of output port
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*/
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void AddForwardingTableEntry(Mac48Address dest,
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uint16_t vid,
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std::vector<Ptr<NetDevice>> outPorts);
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protected:
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void DoDispose() override;
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/**
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* \brief Receives a packet from one switched port.
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* \param device the originating port
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* \param packet the received packet
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* \param protocol the packet protocol (e.g., Ethertype)
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* \param source the packet source
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* \param destination the packet destination
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* \param packetType the packet type (e.g., host, broadcast, etc.)
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*/
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void ReceiveFromDevice(Ptr<NetDevice> device,
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Ptr<const Packet> packet,
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uint16_t protocol,
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const Address& source,
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const Address& destination,
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PacketType packetType);
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/**
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* \brief Forwards a packet
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* \param incomingPort the packet incoming port
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* \param packet the packet
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* \param protocol the packet protocol (e.g., Ethertype)
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* \param src the packet source
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* \param dst the packet destination
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*/
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void Forward(Ptr<NetDevice> incomingPort,
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Ptr<const Packet> packet,
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uint16_t protocol,
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Mac48Address src,
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Mac48Address dst);
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/**
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* \brief Forwards a broadcast or a multicast packet
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* \param incomingPort the packet incoming port
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* \param packet the packet
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* \param protocol the packet protocol (e.g., Ethertype)
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* \param src the packet source
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* \param dst the packet destination
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*/
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void ForwardBroadcast(Ptr<NetDevice> incomingPort,
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Ptr<const Packet> packet,
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uint16_t protocol,
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Mac48Address src,
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Mac48Address dst);
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/**
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* \brief Get the output ports from the forwarding table
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* \param dest destination mac
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* \param vid Vlan ID
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* \return output ports
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*/
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std::vector<Ptr<NetDevice>> GetOutputPortsFromForwardingTable(Mac48Address dest,
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uint16_t vid);
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private:
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NetDevice::ReceiveCallback m_rxCallback; //!< receive callback
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NetDevice::PromiscReceiveCallback m_promiscRxCallback; //!< promiscuous receive callback
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Mac48Address m_address; //!< MAC address of the NetDevice
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/**
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* \ingroup ethernet
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* Structure holding the association between ports and vid for a mac destination address
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*/
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struct PortsToVidAssociation
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{
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Mac48Address dest;
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uint16_t vid;
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std::vector<Ptr<NetDevice>> associatedPorts;
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};
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std::vector<PortsToVidAssociation> m_forwardingTable; //!< Container for forwarding table
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Ptr<Node> m_node; //!< node owning this NetDevice
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Ptr<SwitchChannel> m_channel; //!< virtual bridged channel
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std::vector<Ptr<NetDevice>> m_ports; //!< switched ports
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uint32_t m_ifIndex; //!< Interface index
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uint16_t m_mtu; //!< MTU of the switched NetDevice
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Time m_minForwardingLatency;
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Time m_maxForwardingLatency;
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uint16_t m_maxPortNumber;
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uint16_t m_maxFdbEntryNumber;
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};
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} // namespace ns3
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#endif /* SWITCH_NET_DEVICE_H */
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