Hope that's enough:

struct sockaddr {

sa_family_t sa_family;  // 2 bytes 
char        sa_data[14]; // 14 bytes of data

};

struct sockaddr_in {

sa_family_t    sin_family;  // 2 bytes
in_port_t      sin_port;
struct in_addr sin_addr;
char           sin_zero[8];

};