author | George Riley<riley@ece.gatech.edu> |
Fri, 24 Aug 2007 11:44:11 -0400 | |
changeset 1303 | 9856d1175cbb |
parent 1266 | 6b27f6b349ba |
child 1304 | 642d6798feaa |
permissions | -rw-r--r-- |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2005,2006 INRIA |
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* All rights reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
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* Modified by Emmanuelle Laprise to remove dependance on LLC headers |
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*/ |
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#ifndef NET_DEVICE_H |
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#define NET_DEVICE_H |
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#include <string> |
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#include <stdint.h> |
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#include "ns3/callback.h" |
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#include "ns3/packet.h" |
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#include "ns3/object.h" |
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#include "ns3/ptr.h" |
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#include "address.h" |
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namespace ns3 { |
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|
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class Node; |
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class TraceResolver; |
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class TraceContext; |
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class Channel; |
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/** |
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* \brief Network layer to device interface |
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* |
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* This interface defines the API which the IP and ARP |
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* layers need to access to manage an instance of a network device |
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* layer. It currently does not support MAC-level |
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* multicast but this should not be too hard to add by adding |
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* extra methods to register MAC multicast addresses to |
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* filter out unwanted packets before handing them to the |
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* higher layers. |
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* |
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* In Linux, this interface is analogous to the interface |
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* just above dev_queue_xmit() (i.e., IP packet is fully |
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* constructed with destination MAC address already selected). |
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* |
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* If you want to write a new MAC layer, you need to subclass |
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* this base class and implement your own version of the |
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* NetDevice::SendTo method. |
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*/ |
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class NetDevice : public Object |
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{ |
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public: |
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static const InterfaceId iid; |
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virtual ~NetDevice(); |
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|
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/** |
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* \param context the trace context to use to construct the |
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* TraceResolver to return |
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* \returns a TraceResolver which can resolve all traces |
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* performed in this object. The caller must |
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* delete the returned object. |
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*/ |
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TraceResolver *CreateTraceResolver (TraceContext const &context); |
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/** |
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* \return the channel this NetDevice is connected to. The value |
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* returned can be zero if the NetDevice is not yet connected |
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* to any channel. |
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*/ |
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Ptr<Channel> GetChannel (void) const; |
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/** |
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* \return the current Address of this interface. |
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*/ |
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Address GetAddress (void) const; |
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/** |
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* \param mtu MTU value, in bytes, to set for the device |
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* \return whether the MTU value was within legal bounds |
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* |
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* Override for default MTU defined on a per-type basis. |
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*/ |
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bool SetMtu (const uint16_t mtu); |
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/** |
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* \return the link-level MTU in bytes for this interface. |
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* |
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* This value is typically used by the IP layer to perform |
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* IP fragmentation when needed. |
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*/ |
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uint16_t GetMtu (void) const; |
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/** |
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* \param name name of the device (e.g. "eth0") |
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*/ |
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void SetName(const std::string name); |
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/** |
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* \return name name of the device (e.g. "eth0") |
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*/ |
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std::string GetName(void) const; |
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/** |
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* \param index ifIndex of the device |
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*/ |
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void SetIfIndex(const uint32_t index); |
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/** |
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* \return index ifIndex of the device |
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*/ |
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uint32_t GetIfIndex(void) const; |
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/** |
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* \return true if link is up; false otherwise |
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*/ |
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bool IsLinkUp (void) const; |
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/** |
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* \param callback the callback to invoke |
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* |
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* Register a callback invoked whenever the link |
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* status changes to UP. This callback is typically used |
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* by the IP/ARP layer to flush the ARP cache |
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* whenever the link goes up. |
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*/ |
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void SetLinkChangeCallback (Callback<void> callback); |
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/** |
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* \return true if this interface supports a broadcast address, |
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* false otherwise. |
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*/ |
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bool IsBroadcast (void) const; |
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/** |
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* \return the broadcast address supported by |
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* this netdevice. |
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* |
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* Calling this method is invalid if IsBroadcast returns |
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* not true. |
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*/ |
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Address const &GetBroadcast (void) const; |
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/** |
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* \return value of m_isMulticast flag |
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*/ |
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bool IsMulticast (void) const; |
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/** |
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* \return value of m_isPointToPoint flag |
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*/ |
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bool IsPointToPoint (void) const; |
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/** |
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* \param p packet sent from above down to Network Device |
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* \param dest mac address of the destination (already resolved) |
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* \param protocolNumber identifies the type of payload contained in |
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* this packet. Used to call the right L3Protocol when the packet |
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* is received. |
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* |
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* Called from higher layer to send packet into Network Device |
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* to the specified destination Address |
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* |
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* \return whether the Send operation succeeded |
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*/ |
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161 |
bool Send(Packet& p, const Address& dest, uint16_t protocolNumber); |
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162 |
/** |
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* \returns the node base class which contains this network |
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* interface. |
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* |
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* When a subclass needs to get access to the underlying node |
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* base class to print the nodeid for example, it can invoke |
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* this method. |
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169 |
*/ |
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Ptr<Node> GetNode (void) const; |
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|
597
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/** |
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* \returns true if ARP is needed, false otherwise. |
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* |
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* Called by higher-layers to check if this NetDevice requires |
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* ARP to be used. |
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177 |
*/ |
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178 |
bool NeedsArp (void) const; |
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|
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/** |
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* \param device a pointer to the net device which is calling this callback |
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* \param packet the packet received |
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* \param protocol the 16 bit protocol number associated with this packet. |
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184 |
* This protocol number is expected to be the same protocol number |
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* given to the Send method by the user on the sender side. |
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* \param address the address of the sender |
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187 |
* \returns true if the callback could handle the packet successfully, false |
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188 |
* otherwise. |
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189 |
*/ |
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190 |
typedef Callback<bool,Ptr<NetDevice>,Packet &,uint16_t,const Address &> ReceiveCallback; |
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191 |
|
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192 |
/** |
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193 |
* \param cb callback to invoke whenever a packet has been received and must |
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194 |
* be forwarded to the higher layers. |
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* |
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196 |
*/ |
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197 |
void SetReceiveCallback (ReceiveCallback cb); |
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198 |
|
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199 |
protected: |
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/** |
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201 |
* \param node base class node pointer of device's node |
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202 |
* \param addr MAC address of this device. |
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203 |
*/ |
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204 |
NetDevice(Ptr<Node> node, const Address& addr); |
597
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/** |
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206 |
* Enable broadcast support. This method should be |
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207 |
* called by subclasses from their constructor |
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208 |
*/ |
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209 |
void EnableBroadcast (Address broadcast); |
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/** |
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211 |
* Set m_isBroadcast flag to false |
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212 |
*/ |
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213 |
void DisableBroadcast (void); |
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214 |
/** |
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215 |
* Set m_isMulticast flag to true |
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216 |
*/ |
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217 |
void EnableMulticast (void); |
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218 |
/** |
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219 |
* Set m_isMulticast flag to false |
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220 |
*/ |
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221 |
void DisableMulticast (void); |
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222 |
/** |
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223 |
* Set m_isPointToPoint flag to true |
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224 |
*/ |
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225 |
void EnablePointToPoint (void); |
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226 |
/** |
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227 |
* Set m_isPointToPoint flag to false |
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228 |
*/ |
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229 |
void DisablePointToPoint (void); |
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230 |
/** |
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231 |
* When a subclass notices that the link status has changed to up, |
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232 |
* it notifies its parent class by calling this method. This method |
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233 |
* is responsible for notifying any LinkUp callbacks. |
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234 |
*/ |
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235 |
void NotifyLinkUp (void); |
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236 |
/** |
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237 |
* When a subclass notices that the link status has changed to |
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* down, it notifies its parent class by calling this method. |
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*/ |
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void NotifyLinkDown (void); |
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/** |
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* \param p packet sent from below up to Network Device |
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* \param param Extra parameter extracted from header and needed by |
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* some protocols |
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* \param address the address of the sender of this packet. |
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* \returns true if the packet was forwarded successfully, |
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* false otherwise. |
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* |
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* When a subclass gets a packet from the channel, it |
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* forwards it to the higher layers by calling this method |
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* which is responsible for passing it up to the Rx callback. |
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*/ |
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bool ForwardUp (Packet& p, uint32_t param, const Address &address); |
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|
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/** |
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* The dispose method for this NetDevice class. |
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* Subclasses are expected to override this method _and_ |
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* to chain up to it by calling NetDevice::DoDispose |
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* at the end of their own DoDispose method. |
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*/ |
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virtual void DoDispose (void); |
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|
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private: |
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/** |
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* \param p packet to send |
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* \param dest address of destination to which packet must be sent |
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* \param protocolNumber Number of the protocol (used with some protocols) |
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* \returns true if the packet could be sent successfully, false |
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* otherwise. |
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* |
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* This is the private virtual target function of the public Send() |
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* method. When the link is Up, this method is invoked to ask |
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* subclasses to forward packets. Subclasses MUST override this method. |
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*/ |
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virtual bool SendTo (Packet& p, const Address &dest, uint16_t protocolNumber) = 0; |
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/** |
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* \returns true if this NetDevice needs the higher-layers |
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* to perform ARP over it, false otherwise. |
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* |
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* Subclasses must implement this method. |
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*/ |
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virtual bool DoNeedsArp (void) const = 0; |
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/** |
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* \param context the trace context to associated to the |
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* trace resolver. |
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* \returns a trace resolver associated to the input context. |
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* the caller takes ownership of the pointer returned. |
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* |
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* Subclasses must implement this method. |
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*/ |
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virtual TraceResolver *DoCreateTraceResolver (TraceContext const &context) = 0; |
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/** |
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* \returns the channel associated to this NetDevice. |
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* |
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* Subclasses must implement this method. |
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*/ |
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virtual Ptr<Channel> DoGetChannel (void) const = 0; |
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|
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Ptr<Node> m_node; |
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std::string m_name; |
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uint16_t m_ifIndex; |
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Address m_address; |
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Address m_broadcast; |
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uint16_t m_mtu; |
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bool m_isUp; |
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bool m_isBroadcast; |
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bool m_isMulticast; |
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bool m_isPointToPoint; |
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Callback<void> m_linkChangeCallback; |
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ReceiveCallback m_receiveCallback; |
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}; |
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}; // namespace ns3 |
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#endif |