Ethernet Methods

ethernet – Ethernet Helper Functions

moddy.lib.net.ethernet.eth_bcast_addr()

Returns

Ethernet Broadcast MAC Address “FF:FF:FF:FF:FF:FF”

moddy.lib.net.ethernet.eth_flight_time(net_speed, n_bytes)

Compute flight time of an Ethernet frame If nBytes are below the minimum Ethernet frame length, the flight time of the minimum frame length is returned.

Parameters

• netSpeed – physical link speed in bits/second

• nBytes – number of bytes to transmit

Returns

transmission time on wire in seconds

moddy.lib.net.ethernet.eth_hdr_len()

Returns

Ethernet header byte length

moddy.lib.net.ethernet.eth_pdu(src, dst, eth_type, payload)

Create an Ethernet Pdu

Parameters

• src (str) – Source MAC address

• dst (str) – Destination MAC address

• eht_type – Ethernet type

• payload (Pdu) – Ethernet payload

Returns

filled Pdu