author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Mon, 03 Mar 2008 01:58:57 +0100 | |
changeset 2542 | a9b88fdc09d6 |
parent 2470 | 254581fb9e9c |
child 2600 | 6c389d0c717d |
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/object.h" |
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#include "ns3/ptr.h" |
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#include "address.h" |
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#include "ipv4-address.h" |
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namespace ns3 { |
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|
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class Node; |
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class TraceContext; |
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class Channel; |
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class Packet; |
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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 TypeId GetTypeId (void); |
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virtual ~NetDevice(); |
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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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virtual void SetName(const std::string name) = 0; |
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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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virtual std::string GetName(void) const = 0; |
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/** |
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* \param index ifIndex of the device |
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*/ |
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virtual void SetIfIndex(const uint32_t index) = 0; |
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/** |
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* \return index ifIndex of the device |
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*/ |
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virtual uint32_t GetIfIndex(void) const = 0; |
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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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virtual Ptr<Channel> GetChannel (void) const = 0; |
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/** |
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* \return the current Address of this interface. |
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*/ |
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virtual Address GetAddress (void) const = 0; |
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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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virtual bool SetMtu (const uint16_t mtu) = 0; |
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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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virtual uint16_t GetMtu (void) const = 0; |
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/** |
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* \return true if link is up; false otherwise |
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*/ |
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virtual bool IsLinkUp (void) const = 0; |
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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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116 |
* status changes to UP. This callback is typically used |
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117 |
* by the IP/ARP layer to flush the ARP cache |
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118 |
* whenever the link goes up. |
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119 |
*/ |
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virtual void SetLinkChangeCallback (Callback<void> callback) = 0; |
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121 |
/** |
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122 |
* \return true if this interface supports a broadcast address, |
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123 |
* false otherwise. |
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124 |
*/ |
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125 |
virtual bool IsBroadcast (void) const = 0; |
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126 |
/** |
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127 |
* \return the broadcast address supported by |
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128 |
* this netdevice. |
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129 |
* |
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130 |
* Calling this method is invalid if IsBroadcast returns |
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131 |
* not true. |
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132 |
*/ |
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virtual Address GetBroadcast (void) const = 0; |
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134 |
|
234
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135 |
/** |
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136 |
* \return value of m_isMulticast flag |
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137 |
*/ |
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138 |
virtual bool IsMulticast (void) const = 0; |
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139 |
|
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140 |
/** |
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141 |
* \brief Return the MAC multicast base address used when mapping multicast |
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142 |
* groups to MAC multicast addresses. |
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143 |
* |
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144 |
* Typically when one constructs a multicast MAC addresses, some bits from |
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145 |
* the IP multicast group are copied into a corresponding MAC multicast |
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146 |
* group. In EUI-48, for example, the low order 23 bits of the multicast |
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147 |
* group are copied to the MAC multicast group base address. |
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148 |
* |
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|
149 |
* This method allows access to the underlying MAC multicast group base |
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150 |
* address. It is expected that in most cases, a net device client will |
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|
151 |
* allow the net device to perform the actual construction of the multicast |
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|
152 |
* address. Use of this method is discouraged unless you have a good reason |
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|
153 |
* to perform a custom mapping. You should prefer |
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|
154 |
* NetDevice::MakeMulticastAddress which will do the RFC-specified mapping |
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|
155 |
* for the net device in question. |
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|
156 |
* |
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|
157 |
* \return The multicast address supported by this net device. |
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|
158 |
* |
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|
159 |
* \warning Calling this method is invalid if IsMulticast returns not true. |
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|
160 |
* The method NS_ASSERTs if the device is not a multicast device. |
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|
161 |
* \see NetDevice::MakeMulticastAddress |
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|
162 |
*/ |
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163 |
virtual Address GetMulticast (void) const = 0; |
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164 |
|
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|
165 |
/** |
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|
166 |
* \brief Make and return a MAC multicast address using the provided |
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|
167 |
* multicast group |
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|
168 |
* |
1443
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|
169 |
* RFC 1112 says that an Ipv4 host group address is mapped to an Ethernet |
580ed7a4dd1e
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|
170 |
* multicast address by placing the low-order 23-bits of the IP address into |
580ed7a4dd1e
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|
171 |
* the low-order 23 bits of the Ethernet multicast address |
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|
172 |
* 01-00-5E-00-00-00 (hex). Similar RFCs exist for Ipv6 and Eui64 mappings. |
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|
173 |
* This method performs the multicast address creation function appropriate |
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|
174 |
* to the underlying MAC address of the device. This MAC address is |
580ed7a4dd1e
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|
175 |
* encapsulated in an abstract Address to avoid dependencies on the exact |
580ed7a4dd1e
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|
176 |
* MAC address format. |
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|
177 |
* |
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|
178 |
* A default imlementation of MakeMulticastAddress is provided, but this |
580ed7a4dd1e
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|
179 |
* method simply NS_ASSERTS. In the case of net devices that do not support |
580ed7a4dd1e
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|
180 |
* multicast, clients are expected to test NetDevice::IsMulticast and avoid |
580ed7a4dd1e
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|
181 |
* attempting to map multicast packets. Subclasses of NetDevice that do |
580ed7a4dd1e
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|
182 |
* support multicasting are expected to override this method and provide an |
580ed7a4dd1e
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|
183 |
* implementation appropriate to the particular device. |
580ed7a4dd1e
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|
184 |
* |
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|
185 |
* \param multicastGroup The IP address for the multicast group destination |
580ed7a4dd1e
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|
186 |
* of the packet. |
580ed7a4dd1e
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|
187 |
* \return The MAC multicast Address used to send packets to the provided |
580ed7a4dd1e
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|
188 |
* multicast group. |
580ed7a4dd1e
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|
189 |
* |
580ed7a4dd1e
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|
190 |
* \warning Calling this method is invalid if IsMulticast returns not true. |
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|
191 |
* \see Ipv4Address |
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|
192 |
* \see Address |
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|
193 |
* \see NetDevice::IsMulticast |
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|
194 |
*/ |
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|
195 |
virtual Address MakeMulticastAddress (Ipv4Address multicastGroup) const = 0; |
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|
196 |
|
234
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|
197 |
/** |
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|
198 |
* \return value of m_isPointToPoint flag |
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|
199 |
*/ |
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|
200 |
virtual bool IsPointToPoint (void) const = 0; |
234
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|
201 |
/** |
2191 | 202 |
* \param packet packet sent from above down to Network Device |
234
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|
203 |
* \param dest mac address of the destination (already resolved) |
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|
204 |
* \param protocolNumber identifies the type of payload contained in |
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|
205 |
* this packet. Used to call the right L3Protocol when the packet |
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|
206 |
* is received. |
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|
207 |
* |
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|
208 |
* Called from higher layer to send packet into Network Device |
1161
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|
209 |
* to the specified destination Address |
234
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|
210 |
* |
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|
211 |
* \return whether the Send operation succeeded |
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|
212 |
*/ |
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|
213 |
virtual bool Send(Ptr<Packet> packet, const Address& dest, uint16_t protocolNumber) = 0; |
535
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|
214 |
/** |
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|
215 |
* \returns the node base class which contains this network |
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changeset
|
216 |
* interface. |
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changeset
|
217 |
* |
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changeset
|
218 |
* When a subclass needs to get access to the underlying node |
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|
219 |
* base class to print the nodeid for example, it can invoke |
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changeset
|
220 |
* this method. |
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Enable both ascii and pcap tracing
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|
221 |
*/ |
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|
222 |
virtual Ptr<Node> GetNode (void) const = 0; |
234
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|
223 |
|
597
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complete dox doc
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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diff
changeset
|
224 |
/** |
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changeset
|
225 |
* \returns true if ARP is needed, false otherwise. |
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changeset
|
226 |
* |
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|
227 |
* Called by higher-layers to check if this NetDevice requires |
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|
228 |
* ARP to be used. |
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|
229 |
*/ |
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|
230 |
virtual bool NeedsArp (void) const = 0; |
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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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* 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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* \returns true if the callback could handle the packet successfully, false |
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* otherwise. |
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*/ |
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typedef Callback<bool,Ptr<NetDevice>,Ptr<Packet>,uint16_t,const Address &> ReceiveCallback; |
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/** |
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* \param cb callback to invoke whenever a packet has been received and must |
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* be forwarded to the higher layers. |
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* |
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*/ |
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virtual void SetReceiveCallback (ReceiveCallback cb) = 0; |
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}; |
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} // namespace ns3 |
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#endif /* NET_DEVICE_H */ |