138 lines
3.4 KiB
C++
138 lines
3.4 KiB
C++
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#include "ethernet-channel.h"
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#include "ethernet-net-device.h"
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#include "ns3/log.h"
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#include "ns3/packet.h"
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#include "ns3/simulator.h"
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#include "ns3/trace-source-accessor.h"
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namespace ns3
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{
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NS_LOG_COMPONENT_DEFINE("EthernetChannel");
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NS_OBJECT_ENSURE_REGISTERED(EthernetChannel);
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TypeId
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EthernetChannel::GetTypeId()
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{
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static TypeId tid =
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TypeId("ns3::EthernetChannel")
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.SetParent<Channel>()
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.SetGroupName("Ethernet")
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.AddConstructor<EthernetChannel>()
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.AddAttribute("Delay",
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"Propagation delay through the channel",
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TimeValue(NanoSeconds(25)),
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MakeTimeAccessor(&EthernetChannel::m_delay),
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MakeTimeChecker())
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.AddTraceSource("TxRxEthernet",
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"Trace source indicating transmission of packet "
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"from the EthernetChannel, used by the Animation "
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"interface.",
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MakeTraceSourceAccessor(&EthernetChannel::m_txrxEthernet),
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"ns3::EthernetChannel::TxRxAnimationCallback");
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return tid;
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}
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EthernetChannel::EthernetChannel()
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: Channel(),
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m_nDevices(0)
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{
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NS_LOG_FUNCTION_NOARGS();
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}
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void
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EthernetChannel::Attach(Ptr<EthernetNetDevice> device)
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{
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NS_LOG_FUNCTION(this << device);
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NS_ASSERT_MSG(m_nDevices < N_DEVICES, "Only two devices permitted");
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NS_ASSERT(device);
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m_wire[m_nDevices++].m_src = device;
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//
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// If we have both devices connected to the channel, then finish introducing
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// the two halves and set the links to IDLE.
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//
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if (m_nDevices == N_DEVICES)
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{
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m_wire[0].m_dst = m_wire[1].m_src;
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m_wire[1].m_dst = m_wire[0].m_src;
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m_wire[0].m_state = IDLE;
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m_wire[1].m_state = IDLE;
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}
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}
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bool
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EthernetChannel::TransmitStart(Ptr<const Packet> p, Ptr<EthernetNetDevice> src, Time txTime)
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{
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NS_LOG_FUNCTION(this << p << src);
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NS_LOG_LOGIC("UID is " << p->GetUid() << ")");
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NS_ASSERT(m_wire[0].m_state != INITIALIZING);
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NS_ASSERT(m_wire[1].m_state != INITIALIZING);
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uint32_t wire = src == m_wire[0].m_src ? 0 : 1;
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Simulator::ScheduleWithContext(m_wire[wire].m_dst->GetNode()->GetId(),
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txTime + m_delay,
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&EthernetNetDevice::Receive,
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m_wire[wire].m_dst,
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p->Copy());
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// Call the tx anim callback on the net device
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m_txrxEthernet(p, src, m_wire[wire].m_dst, txTime, txTime + m_delay);
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return true;
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}
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std::size_t
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EthernetChannel::GetNDevices() const
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{
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NS_LOG_FUNCTION_NOARGS();
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return m_nDevices;
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}
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Ptr<EthernetNetDevice>
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EthernetChannel::GetEthernetDevice(std::size_t i) const
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{
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NS_LOG_FUNCTION_NOARGS();
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NS_ASSERT(i < 2);
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return m_wire[i].m_src;
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}
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Ptr<NetDevice>
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EthernetChannel::GetDevice(std::size_t i) const
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{
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NS_LOG_FUNCTION_NOARGS();
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return GetEthernetDevice(i);
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}
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Time
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EthernetChannel::GetDelay() const
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{
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return m_delay;
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}
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Ptr<EthernetNetDevice>
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EthernetChannel::GetSource(uint32_t i) const
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{
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return m_wire[i].m_src;
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}
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Ptr<EthernetNetDevice>
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EthernetChannel::GetDestination(uint32_t i) const
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{
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return m_wire[i].m_dst;
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}
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bool
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EthernetChannel::IsInitialized() const
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{
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NS_ASSERT(m_wire[0].m_state != INITIALIZING);
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NS_ASSERT(m_wire[1].m_state != INITIALIZING);
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return true;
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}
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}
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