Module ethernet 

Ethernet frame parsing and construction

Implements IEEE 802.3 Ethernet frame handling for the network stack. Supports parsing incoming frames and constructing outgoing frames with proper MAC addressing and EtherType identification.

Structs

EthernetFrame

Parsed Ethernet frame

Constants

ETHERNET_HEADER_SIZE

Ethernet frame header size: dst(6) + src(6) + ethertype(2) = 14 bytes

ETHERNET_MAX_PAYLOAD

Maximum Ethernet frame payload (standard MTU)

ETHERNET_MIN_PAYLOAD

Minimum Ethernet frame payload (excluding header)

ETHERTYPE_ARP

ETHERTYPE_IPV4

EtherType constants

ETHERTYPE_IPV6

Functions

construct_frame

Construct an Ethernet frame from components.

dispatch_frame

Dispatch a received Ethernet frame to the appropriate protocol handler.

is_broadcast

Check if a MAC address is a broadcast address (FF:FF:FF:FF:FF:FF)

is_for_us

Check if a MAC address matches or is broadcast or is IPv6 multicast

is_ipv6_multicast

Check if a MAC address is an IPv6 multicast address (33:33:xx:xx:xx:xx)

parse_frame

Parse an Ethernet frame from raw bytes.