Transport.RawTransport Class Reference

Class for interacting with raw sockets of the real network interface. More...

Collaboration diagram for Transport.RawTransport:

Public Member Functions
def	__init__ (self, dev, node_mac, topology_neighbors)
	Constructor. More...
def	recv_data (self)
	Receive and return source mac, dsr_header and upper layer data from the interface. More...
def	send_raw_frame (self, dst_mac, dsr_message, payload)
	Send raw frame to the network. More...
def	gen_eth_header (self, src_mac, dst_mac)
	Generate ethernet header. More...
def	recv_data_with_filter (self)
	Receive frames with filtering. More...
def	recv_data_no_filter (self)
	Receive all frames without filtering. More...
def	get_src_mac (self, eth_header)
	Get source MAC address from the given ethernet header. More...
def	close_raw_recv_socket (self)
	Stop reading from the receiving socket and close it. More...

Public Attributes
	send_socket
	Create a send raw socket. More...
	proto
	Custom protocol ID on L2 layer. More...
	node_mac
	The node's own MAC address. More...
	broadcast_mac
	Default value of the broadcast MAC address. More...
	topology_neighbors
	List of neighbors MAC addresses to be accepted if the filtering is On. More...
	running
	Thread running state bool() flag. More...
	recv_socket
	For receiving incoming raw frames. More...
	recv_data
	Define which RawTransport.recv_data method will be used, depending on the SET_TOPOLOGY_FLAG flag value. More...

Detailed Description

Class for interacting with raw sockets of the real network interface.

Constructor & Destructor Documentation

def Transport.RawTransport.__init__	(		self,
			dev,
			node_mac,
			topology_neighbors
	)

Constructor.

Parameters

self	The object pointer.
dev	Name of physical network interface.
node_mac	The node's own MAC address.
topology_neighbors	List of neighbors MAC addresses to be accepted if the filtering is On.

Returns

None

Member Function Documentation

def Transport.RawTransport.close_raw_recv_socket

(

self

)

Stop reading from the receiving socket and close it.

Parameters

self	The object pointer.

Returns

None

def Transport.RawTransport.gen_eth_header	(		self,
			src_mac,
			dst_mac
	)

Generate ethernet header.

Parameters

self	The object pointer.
src_mac	Source MAC address.
dst_mac	Destination MAC address.

Returns

Ethernet header in binary string representation.

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def Transport.RawTransport.get_src_mac	(		self,
			eth_header
	)

Get source MAC address from the given ethernet header.

Parameters

self	The object pointer.
eth_header	Ethernet header in binary representation.

Returns

MAC address in "xx:xx:xx:xx:xx:xx" format.

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def Transport.RawTransport.recv_data

(

self

)

Receive and return source mac, dsr_header and upper layer data from the interface.

This method listens for any incoming raw frames from the interface, and outputs the list containing a source mac, dsr_header and the upper_raw_data of the frame received.

Parameters

self	The object pointer.

Returns

[src_mac, dsr_header_obj, upper_raw_data].

def Transport.RawTransport.recv_data_no_filter

(

self

)

Receive all frames without filtering.

Receive and return source mac, dsr_header and upper layer data from the interface from ANY mac address without filtering.

Parameters

self	The object pointer.

Returns

[src_mac, dsr_header_obj, upper_raw_data].

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def Transport.RawTransport.recv_data_with_filter

(

self

)

Receive frames with filtering.

Receive and return source mac, dsr_header and upper layer data from the interface, filter out the mac addresses, which are not in the RawTransport.topology_neighbors list.

Parameters

self	The object pointer.

Returns

[src_mac, dsr_header_obj, upper_raw_data].

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def Transport.RawTransport.send_raw_frame	(		self,
			dst_mac,
			dsr_message,
			payload
	)

Send raw frame to the network.

Parameters

self	The object pointer.
dst_mac	Destination MAC address.
dsr_message	Message object from Messages module.
payload	User/Service payload after the protocol's header.

Returns

None

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Member Data Documentation

Transport.RawTransport.broadcast_mac

Default value of the broadcast MAC address.

Transport.RawTransport.node_mac

The node's own MAC address.

Transport.RawTransport.proto

Custom protocol ID on L2 layer.

Transport.RawTransport.recv_data

Define which RawTransport.recv_data method will be used, depending on the SET_TOPOLOGY_FLAG flag value.

Transport.RawTransport.recv_socket

For receiving incoming raw frames.

Transport.RawTransport.running

Thread running state bool() flag.

Transport.RawTransport.send_socket

Create a send raw socket.

Type 0x7777 corresponds to the chosen "protocol_type" in our custom ethernet frame. In this way, the socket can only receive packets with 0x7777 protocol type.

Transport.RawTransport.topology_neighbors

List of neighbors MAC addresses to be accepted if the filtering is On.

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

• Transport.py