dhcpcd-discuss

In lpf.c, dhcpcd declares a variable named su.

union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_ll sll;
struct sockaddr_storage ss;
} su;

It only initialize the su.sll, but in the action of bind, the socket fd
bind to su.sa with the addr_len of sizeof(su).

I'm confusing why we need a sockunion and bind to su.sa with the length of
sizeof(su)?

Thank you.

Jayce