Link-Layer socket descriptor.
unsigned char sll_addr[8]
Physical-layer address.
unsigned short sll_family
Always AF_PACKET.
unsigned char sll_pkttype
Packet type.
unsigned char sll_halen
Length of address.
unsigned short sll_hatype
ARP hardware type.
int sll_ifindex
Interface number.
unsigned short sll_protocol
Physical-layer protocol.