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ns3::OpenFlowSwitchNetDevice Class Reference

A net device that switches multiple LAN segments via an OpenFlow-compatible flow table. More...

#include <openflow-switch-net-device.h>

+ Inheritance diagram for ns3::OpenFlowSwitchNetDevice:

Public Member Functions

int AddSwitchPort (Ptr< NetDevice > switchPort)
 Add a 'port' to a switch device. More...
 
int AddVPort (const ofp_vport_mod *ovpm)
 Add a virtual port to a switch device. More...
 
void DoOutput (uint32_t packet_uid, int in_port, size_t max_len, int out_port, bool ignore_no_fwd)
 Called from the OpenFlow Interface to output the Packet on either a Port or the Controller. More...
 
int ForwardControlInput (const void *msg, size_t length)
 The registered controller calls this method when sending a message to the switch. More...
 
sw_chain * GetChain ()
 
uint32_t GetNSwitchPorts (void) const
 
ofi::Port GetSwitchPort (uint32_t n) const
 
int GetSwitchPortIndex (ofi::Port p)
 
vport_table_t GetVPortTable ()
 
void SetController (Ptr< ofi::Controller > c)
 Set up the Switch's controller connection. More...
 
void StatsDone (ofi::StatsDumpCallback *cb_)
 Stats callback is done. More...
 
int StatsDump (ofi::StatsDumpCallback *cb_)
 Stats callback is ready for a dump. More...
 
From NetDevice
virtual void SetIfIndex (const uint32_t index)
 
virtual uint32_t GetIfIndex (void) const
 
virtual Ptr< ChannelGetChannel (void) const
 
virtual void SetAddress (Address address)
 
virtual Address GetAddress (void) const
 
virtual bool SetMtu (const uint16_t mtu)
 
virtual uint16_t GetMtu (void) const
 
virtual bool IsLinkUp (void) const
 
virtual void AddLinkChangeCallback (Callback< void > callback)
 
virtual bool IsBroadcast (void) const
 
virtual Address GetBroadcast (void) const
 
virtual bool IsMulticast (void) const
 
virtual Address GetMulticast (Ipv4Address multicastGroup) const
 Make and return a MAC multicast address using the provided multicast group. More...
 
virtual bool IsPointToPoint (void) const
 Return true if the net device is on a point-to-point link. More...
 
virtual bool IsBridge (void) const
 Return true if the net device is acting as a bridge. More...
 
virtual bool Send (Ptr< Packet > packet, const Address &dest, uint16_t protocolNumber)
 
virtual bool SendFrom (Ptr< Packet > packet, const Address &source, const Address &dest, uint16_t protocolNumber)
 
virtual Ptr< NodeGetNode (void) const
 
virtual void SetNode (Ptr< Node > node)
 
virtual bool NeedsArp (void) const
 
virtual void SetReceiveCallback (NetDevice::ReceiveCallback cb)
 
virtual void SetPromiscReceiveCallback (NetDevice::PromiscReceiveCallback cb)
 
virtual bool SupportsSendFrom () const
 
virtual Address GetMulticast (Ipv6Address addr) const
 Get the MAC multicast address corresponding to the IPv6 address provided. More...
 
- Public Member Functions inherited from ns3::Object
void AggregateObject (Ptr< Object > other)
 
void Dispose (void)
 
AggregateIterator GetAggregateIterator (void) const
 
virtual TypeId GetInstanceTypeId (void) const
 
template<typename T >
Ptr< T > GetObject (void) const
 
template<typename T >
Ptr< T > GetObject (TypeId tid) const
 
void Initialize (void)
 
- Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
 SimpleRefCount (const SimpleRefCount &o)
 
uint32_t GetReferenceCount (void) const
 
SimpleRefCountoperator= (const SimpleRefCount &o)
 
void Ref (void) const
 
void Unref (void) const
 
- Public Member Functions inherited from ns3::ObjectBase
void GetAttribute (std::string name, AttributeValue &value) const
 
bool GetAttributeFailSafe (std::string name, AttributeValue &attribute) const
 
void SetAttribute (std::string name, const AttributeValue &value)
 
bool SetAttributeFailSafe (std::string name, const AttributeValue &value)
 
bool TraceConnect (std::string name, std::string context, const CallbackBase &cb)
 
bool TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
 
bool TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
 
bool TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
 

Static Public Member Functions

static TypeId GetTypeId (void)
 
OpenFlowSwitchNetDevice Description Data

These four data describe the OpenFlowSwitchNetDevice as if it were a real OpenFlow switch.

There is a type of stats request that OpenFlow switches are supposed to handle that returns the description of the OpenFlow switch. Currently manufactured by "The ns-3 team", software description is "Simulated OpenFlow Switch", and the other two are "N/A".

static const char * GetManufacturerDescription ()
 
static const char * GetHardwareDescription ()
 
static const char * GetSoftwareDescription ()
 
static const char * GetSerialNumber ()
 
- Static Public Member Functions inherited from ns3::NetDevice
static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::Object
static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void Cleanup (void)
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 

Protected Member Functions

ofpbuf * BufferFromPacket (Ptr< Packet > packet, Address src, Address dst, int mtu, uint16_t protocol)
 
virtual void DoDispose (void)
 
void ReceiveFromDevice (Ptr< NetDevice > netdev, Ptr< const Packet > packet, uint16_t protocol, const Address &src, const Address &dst, PacketType packetType)
 
- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 
virtual void DoInitialize (void)
 
virtual void NotifyNewAggregate (void)
 
- Protected Member Functions inherited from ns3::ObjectBase
void ConstructSelf (const AttributeConstructionList &attributes)
 
virtual void NotifyConstructionCompleted (void)
 

Private Types

typedef std::map< uint32_t,
ofi::SwitchPacketMetadata
PacketData_t
 
typedef std::vector< ofi::PortPorts_t
 

Private Member Functions

int AddFlow (const ofp_flow_mod *ofm)
 
void FillPortDesc (ofi::Port p, ofp_phy_port *desc)
 
void FlowTableLookup (sw_flow_key key, ofpbuf *buffer, uint32_t packet_uid, int port, bool send_to_controller)
 
void * MakeOpenflowReply (size_t openflow_len, uint8_t type, ofpbuf **bufferp)
 
int ModFlow (const ofp_flow_mod *ofm)
 
int OutputAll (uint32_t packet_uid, int in_port, bool flood)
 
void OutputControl (uint32_t packet_uid, int in_port, size_t max_len, int reason)
 
void OutputPacket (uint32_t packet_uid, int out_port)
 
void OutputPort (uint32_t packet_uid, int in_port, int out_port, bool ignore_no_fwd)
 
void RunThroughFlowTable (uint32_t packet_uid, int port, bool send_to_controller=true)
 
int RunThroughVPortTable (uint32_t packet_uid, int port, uint32_t vport)
 
void SendErrorMsg (uint16_t type, uint16_t code, const void *data, size_t len)
 
void SendFeaturesReply ()
 
void SendFlowExpired (sw_flow *flow, enum ofp_flow_expired_reason reason)
 
int SendOpenflowBuffer (ofpbuf *buffer)
 
void SendPortStatus (ofi::Port p, uint8_t status)
 
void SendVPortTableFeatures ()
 
int UpdatePortStatus (ofi::Port &p)
 
Receive Methods

Actions to do when a specific OpenFlow message/packet is received

Parameters
msgThe OpenFlow message received.
Returns
0 if everything's ok, otherwise an error number.
int ReceiveFeaturesRequest (const void *msg)
 
int ReceiveGetConfigRequest (const void *msg)
 
int ReceiveSetConfig (const void *msg)
 
int ReceivePacketOut (const void *msg)
 
int ReceiveFlow (const void *msg)
 
int ReceivePortMod (const void *msg)
 
int ReceiveStatsRequest (const void *oh)
 
int ReceiveEchoRequest (const void *oh)
 
int ReceiveEchoReply (const void *oh)
 
int ReceiveVPortMod (const void *msg)
 
int ReceiveVPortTableFeaturesRequest (const void *msg)
 

Private Attributes

Mac48Address m_address
 Address of this device.
 
sw_chain * m_chain
 Flow Table; forwarding rules.
 
Ptr< BridgeChannelm_channel
 Collection of port channels into the Switch Channel.
 
Ptr< ofi::Controllerm_controller
 Connection to controller.
 
uint16_t m_flags
 Flags; configurable by the controller.
 
uint64_t m_id
 Unique identifier for this switch, needed for OpenFlow.
 
uint32_t m_ifIndex
 Interface Index.
 
Time m_lastExecute
 Last time the periodic execution occurred.
 
Time m_lookupDelay
 Flow Table Lookup Delay [overhead].
 
uint16_t m_missSendLen
 Flow Table Miss Send Length; configurable by the controller.
 
uint16_t m_mtu
 Maximum Transmission Unit.
 
Ptr< Nodem_node
 Node this device is installed on.
 
PacketData_t m_packetData
 Packet data.
 
Ports_t m_ports
 Switch's ports.
 
NetDevice::PromiscReceiveCallback m_promiscRxCallback
 
NetDevice::ReceiveCallback m_rxCallback
 Callbacks.
 
vport_table_t m_vportTable
 Virtual Port Table.
 

Additional Inherited Members

- Public Types inherited from ns3::NetDevice
enum  PacketType {
  PACKET_HOST = 1, NS3_PACKET_HOST = PACKET_HOST, PACKET_BROADCAST, NS3_PACKET_BROADCAST = PACKET_BROADCAST,
  PACKET_MULTICAST, NS3_PACKET_MULTICAST = PACKET_MULTICAST, PACKET_OTHERHOST, NS3_PACKET_OTHERHOST = PACKET_OTHERHOST
}
 
typedef Callback< bool, Ptr
< NetDevice >, Ptr< const
Packet >, uint16_t, const
Address &, const Address
&, enum PacketType
PromiscReceiveCallback
 
typedef Callback< bool, Ptr
< NetDevice >, Ptr< const
Packet >, uint16_t, const
Address & > 
ReceiveCallback
 

Detailed Description

A net device that switches multiple LAN segments via an OpenFlow-compatible flow table.

The OpenFlowSwitchNetDevice object aggregates multiple netdevices as ports and acts like a switch. It implements OpenFlow-compatibility, according to the OpenFlow Switch Specification v0.8.9 <www.openflowswitch.org/documents/openflow-spec-v0.8.9.pdf>. It implements a flow table that all received packets are run through. It implements a connection to a controller via a subclass of the Controller class, which can send messages to manipulate the flow table, thereby manipulating how the OpenFlow switch behaves.

There are two controllers available in the original package. DropController builds a flow for each received packet to drop all packets it matches (this demonstrates the flow table's basic implementation), and the LearningController implements a "learning switch" algorithm (see 802.1D), where incoming unicast frames from one port may occasionally be forwarded throughout all other ports, but usually they are forwarded only to a single correct output port.

Attention
The Spanning Tree Protocol part of 802.1D is not implemented. Therefore, you have to be careful not to create bridging loops, or else the network will collapse.
Each NetDevice used must only be assigned a Mac Address, adding it to an Ipv4 or Ipv6 layer will cause an error. It also must support a SendFrom call.

A net device that switches multiple LAN segments via an OpenFlow-compatible flow table

Definition at line 86 of file openflow-switch-net-device.h.

Member Function Documentation

int ns3::OpenFlowSwitchNetDevice::AddFlow ( const ofp_flow_mod *  ofm)
private

Add a flow.

See Also
#ENOMEM, #ENOBUFS, #ESRCH
Parameters
ofmThe flow data to add.
Returns
0 if everything's ok, otherwise an error number.
virtual void ns3::OpenFlowSwitchNetDevice::AddLinkChangeCallback ( Callback< void >  callback)
virtual
Parameters
callbackthe callback to invoke

Add a callback invoked whenever the link status changes to UP. This callback is typically used by the IP/ARP layer to flush the ARP cache and by IPv6 stack to flush NDISC cache whenever the link goes up.

Implements ns3::NetDevice.

int ns3::OpenFlowSwitchNetDevice::AddSwitchPort ( Ptr< NetDevice switchPort)

Add a 'port' to a switch device.

This method adds a new switch port to a OpenFlowSwitchNetDevice, so that the new switch port NetDevice becomes part of the switch and L2 frames start being forwarded to/from this NetDevice.

Attention
The netdevice that is being added as switch port must not have an IP address. In order to add IP connectivity to a bridging node you must enable IP on the OpenFlowSwitchNetDevice itself, never on its port netdevices.
Parameters
switchPortThe port to add.
Returns
0 if everything's ok, otherwise an error number.
See Also
#EXFULL
int ns3::OpenFlowSwitchNetDevice::AddVPort ( const ofp_vport_mod *  ovpm)

Add a virtual port to a switch device.

The Ericsson OFSID has the concept of virtual ports and virtual port tables. These are implemented in the OpenFlowSwitchNetDevice, but don't have an understood use [perhaps it may have to do with MPLS integration].

See Also
#EINVAL
Parameters
ovpmThe data for adding a virtual port.
Returns
0 if everything's ok, otherwise an error number.
ofpbuf* ns3::OpenFlowSwitchNetDevice::BufferFromPacket ( Ptr< Packet packet,
Address  src,
Address  dst,
int  mtu,
uint16_t  protocol 
)
protected

Takes a packet and generates an OpenFlow buffer from it, loading the packet data as well as its headers.

Parameters
packetThe packet.
srcThe source address.
dstThe destination address.
mtuThe Maximum Transmission Unit.
protocolThe protocol defining the packet.
Returns
The OpenFlow Buffer created from the packet.
virtual void ns3::OpenFlowSwitchNetDevice::DoDispose ( void  )
protectedvirtual

This method is called by Object::Dispose or by the object's destructor, whichever comes first.

Subclasses are expected to implement their real destruction code in an overriden version of this method and chain up to their parent's implementation once they are done. i.e., for simplicity, the destructor of every subclass should be empty and its content should be moved to the associated DoDispose method.

It is safe to call GetObject from within this method.

Reimplemented from ns3::Object.

void ns3::OpenFlowSwitchNetDevice::DoOutput ( uint32_t  packet_uid,
int  in_port,
size_t  max_len,
int  out_port,
bool  ignore_no_fwd 
)

Called from the OpenFlow Interface to output the Packet on either a Port or the Controller.

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
in_portThe index of the port the Packet was initially received on.
max_lenThe maximum number of bytes the caller wants to be sent; a value of 0 indicates the entire packet should be sent. Used when outputting to controller.
out_portThe port we want to output on.
ignore_no_fwdIf true, Ports that are set to not forward are forced to forward.
void ns3::OpenFlowSwitchNetDevice::FillPortDesc ( ofi::Port  p,
ofp_phy_port *  desc 
)
private

Fill out a description of the switch port.

Parameters
pThe port to get the description from.
descA pointer to the description message; used to fill the description message with the data from the port.
void ns3::OpenFlowSwitchNetDevice::FlowTableLookup ( sw_flow_key  key,
ofpbuf *  buffer,
uint32_t  packet_uid,
int  port,
bool  send_to_controller 
)
private

Called by RunThroughFlowTable on a scheduled delay to account for the flow table lookup overhead.

Parameters
keyMatching key to look up in the flow table.
bufferBuffer of the packet received.
packet_uidPacket UID; used to fetch the packet and its metadata.
portThe port the packet was received over.
send_to_controller
int ns3::OpenFlowSwitchNetDevice::ForwardControlInput ( const void *  msg,
size_t  length 
)

The registered controller calls this method when sending a message to the switch.

Parameters
msgThe message received from the controller.
lengthLength of the message.
Returns
0 if everything's ok, otherwise an error number.
virtual Address ns3::OpenFlowSwitchNetDevice::GetAddress ( void  ) const
virtual
Returns
the current Address of this interface.

Implements ns3::NetDevice.

virtual Address ns3::OpenFlowSwitchNetDevice::GetBroadcast ( void  ) const
virtual
Returns
the broadcast address supported by this netdevice.

Calling this method is invalid if IsBroadcast returns not true.

Implements ns3::NetDevice.

sw_chain* ns3::OpenFlowSwitchNetDevice::GetChain ( )
Returns
The flow table chain.
virtual Ptr<Channel> ns3::OpenFlowSwitchNetDevice::GetChannel ( void  ) const
virtual
Returns
the channel this NetDevice is connected to. The value returned can be zero if the NetDevice is not yet connected to any channel or if the underlying NetDevice has no concept of a channel. i.e., callers must check for zero and be ready to handle it.

Implements ns3::NetDevice.

virtual uint32_t ns3::OpenFlowSwitchNetDevice::GetIfIndex ( void  ) const
virtual
Returns
index ifIndex of the device

Implements ns3::NetDevice.

virtual uint16_t ns3::OpenFlowSwitchNetDevice::GetMtu ( void  ) const
virtual
Returns
the link-level MTU in bytes for this interface.

This value is typically used by the IP layer to perform IP fragmentation when needed.

Implements ns3::NetDevice.

virtual Address ns3::OpenFlowSwitchNetDevice::GetMulticast ( Ipv4Address  multicastGroup) const
virtual

Make and return a MAC multicast address using the provided multicast group.

RFC 1112 says that an Ipv4 host group address is mapped to an Ethernet multicast address by placing the low-order 23-bits of the IP address into the low-order 23 bits of the Ethernet multicast address 01-00-5E-00-00-00 (hex). Similar RFCs exist for Ipv6 and Eui64 mappings. This method performs the multicast address creation function appropriate to the underlying MAC address of the device. This MAC address is encapsulated in an abstract Address to avoid dependencies on the exact MAC address format.

In the case of net devices that do not support multicast, clients are expected to test NetDevice::IsMulticast and avoid attempting to map multicast packets. Subclasses of NetDevice that do support multicasting are expected to override this method and provide an implementation appropriate to the particular device.

Parameters
multicastGroupThe IP address for the multicast group destination of the packet.
Returns
The MAC multicast Address used to send packets to the provided multicast group.
Warning
Calling this method is invalid if IsMulticast returns not true.
See Also
Ipv4Address
Address
NetDevice::IsMulticast

Implements ns3::NetDevice.

virtual Address ns3::OpenFlowSwitchNetDevice::GetMulticast ( Ipv6Address  addr) const
virtual

Get the MAC multicast address corresponding to the IPv6 address provided.

Parameters
addrIPv6 address
Returns
the MAC multicast address
Warning
Calling this method is invalid if IsMulticast returns not true.

Implements ns3::NetDevice.

virtual Ptr<Node> ns3::OpenFlowSwitchNetDevice::GetNode ( void  ) const
virtual
Returns
the node base class which contains this network interface.

When a subclass needs to get access to the underlying node base class to print the nodeid for example, it can invoke this method.

Implements ns3::NetDevice.

uint32_t ns3::OpenFlowSwitchNetDevice::GetNSwitchPorts ( void  ) const
Returns
Number of switch ports attached to this switch.
ofi::Port ns3::OpenFlowSwitchNetDevice::GetSwitchPort ( uint32_t  n) const
Parameters
nindex of the Port.
Returns
The Port.
int ns3::OpenFlowSwitchNetDevice::GetSwitchPortIndex ( ofi::Port  p)
Parameters
pThe Port to get the index of.
Returns
The index of the provided Port.
vport_table_t ns3::OpenFlowSwitchNetDevice::GetVPortTable ( )
Returns
The virtual port table.
virtual bool ns3::OpenFlowSwitchNetDevice::IsBridge ( void  ) const
virtual

Return true if the net device is acting as a bridge.

Returns
value of m_isBridge flag

Implements ns3::NetDevice.

virtual bool ns3::OpenFlowSwitchNetDevice::IsBroadcast ( void  ) const
virtual
Returns
true if this interface supports a broadcast address, false otherwise.

Implements ns3::NetDevice.

virtual bool ns3::OpenFlowSwitchNetDevice::IsLinkUp ( void  ) const
virtual
Returns
true if link is up; false otherwise

Implements ns3::NetDevice.

virtual bool ns3::OpenFlowSwitchNetDevice::IsMulticast ( void  ) const
virtual
Returns
value of m_isMulticast flag

Implements ns3::NetDevice.

virtual bool ns3::OpenFlowSwitchNetDevice::IsPointToPoint ( void  ) const
virtual

Return true if the net device is on a point-to-point link.

Returns
value of m_isPointToPoint flag

Implements ns3::NetDevice.

void* ns3::OpenFlowSwitchNetDevice::MakeOpenflowReply ( size_t  openflow_len,
uint8_t  type,
ofpbuf **  bufferp 
)
private

Generates an OpenFlow reply message based on the type.

Parameters
openflow_lenLength of the reply to make.
typeType of reply message to make.
bufferpMessage buffer; used to make the reply.
Returns
The OpenFlow reply message.
int ns3::OpenFlowSwitchNetDevice::ModFlow ( const ofp_flow_mod *  ofm)
private

Modify a flow.

Parameters
ofmThe flow data to modify.
Returns
0 if everything's ok, otherwise an error number.
virtual bool ns3::OpenFlowSwitchNetDevice::NeedsArp ( void  ) const
virtual
Returns
true if ARP is needed, false otherwise.

Called by higher-layers to check if this NetDevice requires ARP to be used.

Implements ns3::NetDevice.

int ns3::OpenFlowSwitchNetDevice::OutputAll ( uint32_t  packet_uid,
int  in_port,
bool  flood 
)
private

Send packets out all the ports except the originating one

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
in_portThe index of the port the Packet was initially received on. This port doesn't forward when flooding.
floodIf true, don't send out on the ports with flooding disabled.
Returns
0 if everything's ok, otherwise an error number.
void ns3::OpenFlowSwitchNetDevice::OutputControl ( uint32_t  packet_uid,
int  in_port,
size_t  max_len,
int  reason 
)
private

Sends a copy of the Packet to the controller. If the packet can be saved in an OpenFlow buffer, then only the first 'max_len' bytes of the packet are sent; otherwise, all of the packet is sent.

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
in_portThe index of the port the Packet was initially received on.
max_lenThe maximum number of bytes that the caller wants to be sent; a value of 0 indicates the entire packet should be sent.
reasonWhy the packet is being sent.
void ns3::OpenFlowSwitchNetDevice::OutputPacket ( uint32_t  packet_uid,
int  out_port 
)
private

Sends a copy of the Packet over the provided output port

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
void ns3::OpenFlowSwitchNetDevice::OutputPort ( uint32_t  packet_uid,
int  in_port,
int  out_port,
bool  ignore_no_fwd 
)
private

Seeks to send out a Packet over the provided output port. This is called generically when we may or may not know the specific port we're outputting on. There are many pre-set types of port options besides a Port that's hooked to our OpenFlowSwitchNetDevice. For example, it could be outputting as a flood, or seeking to output to the controller.

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
in_portThe index of the port the Packet was initially received on.
out_portThe port we want to output on.
ignore_no_fwdIf true, Ports that are set to not forward are forced to forward.
void ns3::OpenFlowSwitchNetDevice::ReceiveFromDevice ( Ptr< NetDevice netdev,
Ptr< const Packet packet,
uint16_t  protocol,
const Address src,
const Address dst,
PacketType  packetType 
)
protected

Called when a packet is received on one of the switch's ports.

Parameters
netdevThe port the packet was received on.
packetThe Packet itself.
protocolThe protocol defining the Packet.
srcThe source address of the Packet.
dstThe destination address of the Packet.
PacketTypeType of the packet.
void ns3::OpenFlowSwitchNetDevice::RunThroughFlowTable ( uint32_t  packet_uid,
int  port,
bool  send_to_controller = true 
)
private

Run the packet through the flow table. Looks up in the flow table for a match. If it doesn't match, it forwards the packet to the registered controller, if the flag is set.

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
portThe port this packet was received over.
send_to_controllerIf set, sends to the controller if the packet isn't matched.
int ns3::OpenFlowSwitchNetDevice::RunThroughVPortTable ( uint32_t  packet_uid,
int  port,
uint32_t  vport 
)
private

Run the packet through the vport table. As with AddVPort, this doesn't have an understood use yet.

Parameters
packet_uidPacket UID; used to fetch the packet and its metadata.
portThe port this packet was received over.
vportThe virtual port this packet identifies itself by.
Returns
0 if everything's ok, otherwise an error number.
virtual bool ns3::OpenFlowSwitchNetDevice::Send ( Ptr< Packet packet,
const Address dest,
uint16_t  protocolNumber 
)
virtual
Parameters
packetpacket sent from above down to Network Device
destmac address of the destination (already resolved)
protocolNumberidentifies the type of payload contained in this packet. Used to call the right L3Protocol when the packet is received.

Called from higher layer to send packet into Network Device to the specified destination Address

Returns
whether the Send operation succeeded

Implements ns3::NetDevice.

void ns3::OpenFlowSwitchNetDevice::SendErrorMsg ( uint16_t  type,
uint16_t  code,
const void *  data,
size_t  len 
)
private

If an error message happened during the controller's request, send it to the controller.

Parameters
typeThe type of error.
codeThe error code.
dataThe faulty data that lead to the error.
lenThe length of the faulty data.
void ns3::OpenFlowSwitchNetDevice::SendFeaturesReply ( )
private

Send a reply about this OpenFlow switch's features to the controller.

List of capabilities and actions to support are found in the specification <www.openflowswitch.org/documents/openflow-spec-v0.8.9.pdf>.

Supported capabilities and actions are defined in the openflow interface. To recap, flow status, flow table status, port status, virtual port table status can all be requested. It can also transmit over multiple physical interfaces.

It supports every action: outputting over a port, and all of the flow table manipulation actions: setting the 802.1q VLAN ID, the 802.1q priority, stripping the 802.1 header, setting the Ethernet source address and destination, setting the IP source address and destination, setting the TCP/UDP source address and destination, and setting the MPLS label and EXP bits.

Attention
Capabilities STP (Spanning Tree Protocol) and IP packet reassembly are not currently supported.
void ns3::OpenFlowSwitchNetDevice::SendFlowExpired ( sw_flow *  flow,
enum ofp_flow_expired_reason  reason 
)
private

Send a reply to the controller that a specific flow has expired.

Parameters
flowThe flow that expired.
reasonThe reason for sending this expiration notification.
virtual bool ns3::OpenFlowSwitchNetDevice::SendFrom ( Ptr< Packet packet,
const Address source,
const Address dest,
uint16_t  protocolNumber 
)
virtual
Parameters
packetpacket sent from above down to Network Device
sourcesource mac address (so called "MAC spoofing")
destmac address of the destination (already resolved)
protocolNumberidentifies the type of payload contained in this packet. Used to call the right L3Protocol when the packet is received.

Called from higher layer to send packet into Network Device with the specified source and destination Addresses.

Returns
whether the Send operation succeeded

Implements ns3::NetDevice.

int ns3::OpenFlowSwitchNetDevice::SendOpenflowBuffer ( ofpbuf *  buffer)
private

Send a message to the controller. This method is the key to communicating with the controller, it does the actual sending. The other Send methods call this one when they are ready to send a message.

Parameters
bufferBuffer of the message to send out.
Returns
0 if successful, otherwise an error number.
void ns3::OpenFlowSwitchNetDevice::SendPortStatus ( ofi::Port  p,
uint8_t  status 
)
private

Send a reply about a Port's status to the controller.

Parameters
pThe port to get status from.
statusThe reason for sending this reply.
void ns3::OpenFlowSwitchNetDevice::SendVPortTableFeatures ( )
private

Send a reply about this OpenFlow switch's virtual port table features to the controller.

virtual void ns3::OpenFlowSwitchNetDevice::SetAddress ( Address  address)
virtual

Set the address of this interface

Parameters
addressaddress to set

Implements ns3::NetDevice.

void ns3::OpenFlowSwitchNetDevice::SetController ( Ptr< ofi::Controller c)

Set up the Switch's controller connection.

Parameters
cPointer to a Controller.
virtual void ns3::OpenFlowSwitchNetDevice::SetIfIndex ( const uint32_t  index)
virtual
Parameters
indexifIndex of the device

Implements ns3::NetDevice.

virtual bool ns3::OpenFlowSwitchNetDevice::SetMtu ( const uint16_t  mtu)
virtual
Parameters
mtuMTU value, in bytes, to set for the device
Returns
whether the MTU value was within legal bounds

Override for default MTU defined on a per-type basis.

Implements ns3::NetDevice.

virtual void ns3::OpenFlowSwitchNetDevice::SetNode ( Ptr< Node node)
virtual
Parameters
nodethe node associated to this netdevice.

This method is called from ns3::Node::AddDevice.

Implements ns3::NetDevice.

virtual void ns3::OpenFlowSwitchNetDevice::SetPromiscReceiveCallback ( NetDevice::PromiscReceiveCallback  cb)
virtual
Parameters
cbcallback to invoke whenever a packet has been received in promiscuous mode and must be forwarded to the higher layers.

Enables netdevice promiscuous mode and sets the callback that will handle promiscuous mode packets. Note, promiscuous mode packets means all packets, including those packets that can be sensed by the netdevice but which are intended to be received by other hosts.

Implements ns3::NetDevice.

virtual void ns3::OpenFlowSwitchNetDevice::SetReceiveCallback ( NetDevice::ReceiveCallback  cb)
virtual
Parameters
cbcallback to invoke whenever a packet has been received and must be forwarded to the higher layers.

Implements ns3::NetDevice.

void ns3::OpenFlowSwitchNetDevice::StatsDone ( ofi::StatsDumpCallback cb_)

Stats callback is done.

Controllers have a callback system for status requests which calls this function.

Parameters
cb_The callback data.
int ns3::OpenFlowSwitchNetDevice::StatsDump ( ofi::StatsDumpCallback cb_)

Stats callback is ready for a dump.

Controllers have a callback system for status requests which calls this function.

Parameters
cb_The callback data.
Returns
0 if everything's ok, otherwise an error number.
virtual bool ns3::OpenFlowSwitchNetDevice::SupportsSendFrom ( ) const
virtual
Returns
true if this interface supports a bridging mode, false otherwise.

Implements ns3::NetDevice.

int ns3::OpenFlowSwitchNetDevice::UpdatePortStatus ( ofi::Port p)
private

Update the port status field of the switch port. A non-zero return value indicates some field has changed.

Parameters
pA reference to a Port; used to change its config and flag fields.
Returns
true if the status of the Port is changed, false if unchanged (was already the right status).

The documentation for this class was generated from the following file: